A list of all our privacy-preserving, lightweight browser-based tools. All tools run directly in your browser without uploading any data to our servers.
| Tool Name | Description | Category | Link |
|---|---|---|---|
| ⭐ Add Text to Image | Add text to any image. Your image never leaves your device. | Image Tools | Launch |
| ⭐ Meme Generator | Add top & bottom captions, drag to position, and export a PNG — all in your browser. | Image Tools | Launch |
| ⭐ QR Code Generator | Turn any text into a QR code instantly. | Image Tools | Launch |
| ⭐ Barcode Generator | Create Code-128 or EAN-13 barcodes and export as SVG/PNG. | Image Tools | Launch |
| ⭐ Image Resizer & Converter | Resize and convert images between various formats while preserving aspect ratio. | Image Tools | Launch |
| ⭐ Batch Image Resizer & Converter | Process multiple images (up to 10) in batch with global resizing and ZIP download. | Image Tools | Launch |
| ⭐ Wallpaper Generator | Crop once, then export wallpapers in multiple ratios & resolutions for PC, mobile, and ultrawide — all client-side with ZIP download. | Image Tools | Launch |
| ⭐ Crop Image | Crop any image with precision directly in your browser. No upload needed. | Image Tools | Launch |
| ⭐ Compress Image Quality | Compress images with adjustable quality and format. Instant preview. Fully offline. | Image Tools | Launch |
| ⭐ Online Whiteboard Drawing Board | A simple, client-side canvas for quick sketches, diagrams, and image export. | Image Tools | Launch |
| ⭐ Image Placeholder Generator | Generate custom image placeholders with dimensions and text overlay. | Image Tools | Launch |
| ⭐ Image Watermark Tool | Add text or logo watermarks with opacity, position, rotation, and tiling. | Image Tools | Launch |
| ⭐ PDF Redaction (Burn-in) | Draw boxes to permanently remove sensitive content. Burn-in redactions—private, in-browser. | Document Tools | Launch |
| ⭐ PDF Reorder & Rotate | Drag pages to reorder, rotate 90°/180°, delete unwanted pages, then export. Private, runs in-browser. | Document Tools | Launch |
| ⭐ Markdown to PDF | Convert Markdown to printable PDFs with GitHub-style rendering and syntax highlighting. All client-side, private, in-browser. | Document Tools | Launch |
| ⭐ PDF to Image splitter | Split a PDF file into individual images and save selected images or all of them in one click. | Document Tools | Launch |
| ⭐ PDF Merger | Combine multiple PDF files into one single document. No server upload. | Document Tools | Launch |
| ⭐ PDF Compressor | Shrink PDF files instantly in your browser—no uploads required. | Document Tools | Launch |
| ⭐ PDF Text Extractor | Extract all selectable text from your PDF files directly in the browser. | Document Text Tools | Launch |
| ⭐ Word Counter | Count words, characters, numbers, and more in your text. | PDF, Document & Text Tools | Launch |
| ⭐ Text Case Converter | Convert text to CAPITAL, lowercase, capitalized, sentence case, and alternating case. | PDF, Document & Text Tools | Launch |
| ⭐ Alphabetic Numeric Sorter | Alphabetically or numerically sort lines of text. | PDF, Document & Text Tools | Launch |
| ⭐ Line Break & Whitespace Cleaner | Remove all or reduce multiple line breaks and excess whitespace from your text. | PDF, Document & Text Tools | Launch |
| ⭐ Duplicate Line Remover | Remove identical lines from your text with options for case and whitespace. | PDF, Document & Text Tools | Launch |
| ⭐ Text Diff Viewer | Compare two texts and highlight differences. | PDF, Document & Text Tools | Launch |
| ⭐ CSV Viewer with Filters & Sort | Upload, view, sort, and filter CSV data instantly in your browser for quick analysis. | PDF, Document & Text Tools | Launch |
| ⭐ Readability Score Calculator | Analyze text for its readability level using Flesch-Kincaid and other metrics. | Text Tools | Launch |
| ⭐ Keyword Density Checker | Analyze the frequency of keywords and phrases in your text for SEO. | Text Tools | Launch |
| ⭐ Text Replacement Tool | Find and replace text instantly and privately in your browser. | Text Tools | Launch |
| ⭐ Zalgo Glitch Text Generator | Transform your text into unsettling, glitched Zalgo text. | Text Tools | Launch |
| ⭐ Levenshtein Distance (Edit Distance) | Compare two strings and highlight insertions, deletions, and substitutions. | Text Tools | Launch |
| ⭐ GPA Calculator | Calculate your GPA for high school or college, including cumulative and "what do I need" options. | Utility Tools | Launch |
| ⭐ BMI Calculator | Calculate your Body Mass Index (BMI) using imperial or metric units. | Utility Tools | Launch |
| ⭐ BMI vs Body Fat % | Compare BMI with estimated body fat % (US Navy & Deurenberg), metric/imperial, plus a mini chart. | Utility Tools | Launch |
| ⭐ BMR Calculator | Estimate your Basal Metabolic Rate (BMR) with multiple formulas and quick TDEE multipliers. | Utility Tools | Launch |
| ⭐ Calorie (TDEE) Calculator | Estimate your Total Daily Energy Expenditure (TDEE) with activity multipliers and calorie goals. | Utility Tools | Launch |
| ⭐ Age Calculator | Calculate age in years, months, and days, and find time until next birthday. | Utility Tools | Launch |
| ⭐ Age in Weeks & Months Calculator | See age in whole weeks + days, calendar months + days, and decimal months — baby-friendly and private. | Utility Tools | Launch |
| ⭐ Browser Info Tool | Show IP address, browser type, screen size, and user agent for tech support and debugging. | Web Tools | Launch |
| ⭐ HTML Colour Picker | Pick a colour from a palette and get its Hex, RGB, and HSL codes. | Web Tools | Launch |
| ⭐ Markdown to HTML Converter | Convert Markdown text to HTML instantly. | Web Tools | Launch |
| ⭐ Base64 Encoder / Decoder | Encode and decode text to and from Base64. | Web Tools | Launch |
| ⭐ Image to Base64 Converter | Convert any image to a Base64 string in your browser. Copy or download instantly. | Web Tools | Launch |
| ⭐ Timestamp Converter | Convert UNIX timestamps to human-readable dates and vice versa. | Web Tools | Launch |
| ⭐ LDAP / FILETIME Converter | Convert 18-digit LDAP/Windows FILETIME ↔ Date. Decimal & hex, UTC/local display, AD “Never” handled. | Time & Date | Launch |
| ⭐ Apple Cocoa/Core Foundation Time | Convert CFAbsoluteTime/NSTimeInterval (seconds since 2001-01-01 UTC) to dates and back — fractional seconds preserved. | Time & Date | Launch |
| ⭐ Unix Hex Timestamp Converter | Convert Unix timestamps in hex or decimal (seconds or milliseconds) to dates and back — auto-detect with override. | Time & Date | Launch |
| ⭐ Mac HFS+ Timestamp Converter | Convert HFS+ timestamps (seconds since 1904-01-01 UTC) to dates and back — hex/decimal input, optional byte-swap. | Time & Date | Launch |
| ⭐ SAS Timestamp Converter | Convert SAS datetime (seconds since 1960) or SAS date (days since 1960) ↔ human dates. Hex/decimal, fractional seconds. | Time & Date | Launch |
| ⭐ JSON Formatter & Validator | Pretty-print, minify, and validate JSON data instantly in your browser. | Web Tools | Launch |
| ⭐ URL Encoder/Decoder | Encode or decode special characters in URLs. | Web Tools | Launch |
| ⭐ Hash Generator (MD5, SHA1, SHA256) | Generate MD5, SHA1, and SHA256 cryptographic hashes of text strings. | Web Tools | Launch |
| ⭐ Password Strength Checker | Estimate strength, entropy & crack time with optional PBKDF2 timing — all client-side. | Security Tools | Launch |
| ⭐ Blank Markdown Table Generator | Visually create blank Markdown tables by selecting your desired rows and columns. | Web Tools | Launch |
| ⭐ Regex Tester | Test and build regular expressions against sample text with live highlighting. | Web Tools | Launch |
| ⭐ Time Since/Until Calculator | Calculate the duration (years, months, weeks, days, hours, minutes, seconds) since or until a specific date and time. | Web Tools | Launch |
| ⭐ Time Zone Converter | Convert a date & time across 2–3 time zones — DST-safe with 12/24-hour format, overlap suggestions, and a copyable link. | Web Tools | Launch |
| ⭐ Printable Monthly Calendar | Generate clean A4/Letter calendars with Monday/Sunday start, ISO week numbers, notes & mini-months. Print or save as PDF — 100% client-side. | Time & Date | Launch |
| ⭐ ISO Week Number Converter | Convert date ↔ ISO week/year and weekday (Mon–Sun), with full week range and 52/53-week validation. Fast, accurate, and 100% client-side for privacy. | Time & Date | Launch |
| ⭐ Day-of-Year ⇄ Date & Weekday Converter | Convert day-of-year (1–365/366) ↔ calendar date and instantly see the weekday. Leap-year aware, UTC-safe, and 100% client-side for privacy. | Time & Date | Launch |
| ⭐ Add/Subtract Business Days (+ Custom Holidays) | Add or subtract business days with weekend toggles and custom holiday upload. Leap-year aware, UTC-safe, and 100% client-side for privacy. | Time & Date | Launch |
| ⭐ Meta Tag Generator | Create SEO, Open Graph, and Twitter meta tags with live preview. Copy or download a ready-to-use head block. | Web Tools | Launch |
| ⭐ Robots.txt Builder | Build robots.txt with user-agent groups, Allow/Disallow rules, Sitemap URLs, and optional crawl-delay/Host. Copy or download. | Web Tools | Launch |
| ⭐ CSS Gradient Generator | Create linear or radial gradients with multiple color stops, live preview, and one-click CSS copy. | Web Tools | Launch |
| ⭐ Scientific Figure & Page Extractor | Extract high-quality images of figures and pages from research PDFs. | Scientific Tools | Launch |
| ⭐ Research Abstract Formatter | Format abstracts with IMRC headings, clean whitespace, and convert to HTML, Plain Text, or LaTeX. | Scientific Tools | Launch |
| ⭐ BioStats Quick Calculator v0.9 | Quickly calculate t-test, chi-square, or ANOVA for your biological data. | Scientific Tools | Launch |
| ⭐ DNA/Protein Sequence Cleaner + Validator | Clean and validate DNA/protein sequences, remove invalid characters, and ensure proper formatting. | Scientific Tools | Launch |
| ⭐ Blot Image Cleaner | Upload blot/gel images for auto-inversion, contrast enhancement, and noise removal. | Scientific Tools | Launch |
| ⭐ Molarity Calculator | Calculate mass, molecular weight, volume, or concentration for chemical solutions. | Scientific Tools | Launch |
| ⭐ Molecular Weight Calculator | Calculate molecular weight from chemical formulas or protein/DNA/RNA sequences. | Scientific Tools | Launch |
| ⭐ Moles ↔ Mass ↔ Volume (Gas at STP) | Convert between moles, grams, and gas volume using STP/IUPAC STP/SATP molar volume; can infer MW from mass + volume. | Scientific Tools | Launch |
| ⭐ Beer–Lambert Law (A = εlc) | Solve absorbance, molar absorptivity (ε), path length (l), or concentration (c). Includes %T ↔ A conversion and unit-aware inputs. 100% client-side. | Scientific Tools | Launch |
| ⭐ Henderson–Hasselbalch — Buffer pH | Compute pH from pKa and [A⁻]/[HA], or design a buffer recipe from target pH, total concentration, and volume. Unit-aware, with optional grams via molar masses. 100% client-side. | Scientific Tools | Launch |
| ⭐ Dilution Calculator (C1V1=C2V2) v1.1 | Calculate unknown concentrations or volumes using the C1V1=C2V2 formula. | Scientific Tools | Launch |
| ⭐ Sample Size Calculator | Determine the minimum sample size for comparative studies and A/B tests. | Scientific Tools | Launch |
| ⭐ Triangle Calculator | Solve any triangle by entering the three values that you know. | Mathematics Tools | Launch |
| ⭐ Quadratic Equation Calculator | Solve quadratic equations (ax² + bx + c = 0) and see the step-by-step solution. | Mathematics Tools | Launch |
| ⭐ Ratio Calculator | Solve for a missing ratio value and visualize the relationship. | Mathematics Tools | Launch |
| ⭐ Fraction Calculator | Add, subtract, multiply, and divide fractions & mixed numbers with step-by-step simplification. | Mathematics Tools | Launch |
| ⭐ Proportion Calculator | Solve proportions step by step — find the missing value in “a is to b as c is to ?”. | Mathematics Tools | Launch |
| ⭐ Percentage Calculator | Find the percentage of a number, determine percentages, and more. | Calculator Tools | Launch |
| ⭐ Percentage Change Calculator | Quantify the increase or decrease between two values. | Calculator Tools | Launch |
| ⭐ Mean, Median, Mode Calculator | Calculate the mean, median, mode, range, and other key statistics for a set of numbers. | Calculator Tools | Launch |
| ⭐ Average (Mean) Calculator | Quickly compute the arithmetic mean of numbers with support for spaces, commas, and new lines. | Calculator Tools | Launch |
| ⭐ Standard Deviation & Z-Score Calculator | Paste numbers to get mean, variance, standard deviation (population/sample), and per-value z-scores — all client-side. | Calculator Tools | Launch |
| ⭐ Binomial & Poisson Calculator | Enter n,p,k (or λ,k) to compute PMF, CDF, expected value, variance, and view a probability bar chart — all client-side. | Calculator Tools | Launch |
| ⭐ Exponent / Power Calculator (xy) | Calculate powers like 25 or 10-3 in a kid-friendly xy layout. Supports negatives, zero exponents, and scientific notation. | Calculator Tools | Launch |
| ⭐ Prime Factorization Calculator | Check if a number is prime and get its full prime factorization with exponents — instant, private, and student-friendly. | Calculator Tools | Launch |
| ⭐ Scientific Notation Converter | Convert standard ↔ scientific (a × 10n) & engineering notation. Handles E-notation and significant figures — 100% client-side. | Calculator Tools | Launch |
| ⭐ Logarithm Calculator | Compute ln, log10, log2, and log base b; includes change-of-base and antilog — 100% client-side. | Calculator Tools | Launch |
| ⭐ Permutation & Combination Calculator | Compute permutations (nPr) and combinations (nCr) — with or without repetition, exact BigInt results plus approximation. | Calculator Tools | Launch |
| ⭐ LCM & GCF Calculator | Find least common multiple (LCM) and greatest common factor (GCF/HCF) of any integers — supports negatives, zero, and BigInt for large values. | Calculator Tools | Launch |
| ⭐ APR ↔ APY Converter & CAGR | Convert APR⇄APY with custom, daily (360/365), and continuous compounding, plus calculate CAGR instantly. | Calculator Tools | Launch |
| ⭐ NPV & IRR Calculator | Compute NPV & IRR from a cash-flow table; switch between equal periods or exact dates (XNPV/XIRR), with CSV import/export — 100% client-side. | Calculator Tools | Launch |
| ⭐ Perpetuity Calculator | Compute present value (PV) for level, due, or growing perpetuities — or solve for cash flow (C), discount rate (r), or growth (g). 100% client-side. | Calculator Tools | Launch |
| ⭐ Mortgage Repayment Calculator | Estimate loan payments, total interest, and view a full amortization schedule. | Calculator Tools | Launch |
| ⭐ Mortgage vs Renting Calculator | Compare buying vs renting over time—monthly costs, equity, and cumulative net cost with a simple chart. | Calculator Tools | Launch |
| ⭐ Loan Calculator | Calculate monthly payments and view a full repayment schedule. | Calculator Tools | Launch |
| ⭐ Loan Comparison | Compare two loans side by side, add extra payments, and see early payoff savings. | Calculator Tools | Launch |
| ⭐ Auto Loan Calculator | Estimate car payments with down payment, trade-in, taxes, fees, APR, and term. Includes amortization schedule. | Calculator Tools | Launch |
| ⭐ New vs Old Car Cost Calculator | Compare total cost of ownership: purchase/financing, fuel or electricity, maintenance, insurance, fees, and resale. Shows NPV, EAC, and cost per mile. | Calculator Tools | Launch |
| ⭐ Car Insurance Cost Estimator | Estimate an illustrative annual premium with a clear factor breakdown. Currency & tax settings, CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Life Insurance Calculator | Educational level-term premium estimator using survival probabilities & present-value math. Shows net & illustrative gross premiums, death-in-term probability, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Health Insurance Cost Estimator | Educational tool that estimates your total annual cost: premiums + out-of-pocket under deductible, copays, coinsurance, and OOP maximum. Clear line-by-line breakdown, flow-through visualization, scenario presets, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Dental Insurance Cost Estimator | Educational tool that estimates your annual dental cost: premiums + your share after deductible and class coinsurance, with plan-side caps (annual max) and orthodontic lifetime max. Shows Preventive/Basic/Major/Ortho breakdown, waiting-period toggles, clear table outputs, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Travel Insurance Cost Estimator | Educational single-trip premium estimator with transparent factors: duration, destination region, age, medical limit, excess, sports/activities, baggage, and cancellation. Shows clear breakdown, risk multiplier, presets, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Business Insurance Calculator | Transparent, educational estimator for GL, Property, Workers’ Comp, and Professional/Cyber. Exposure × base rate with clear factor breakdown (limits, deductibles, territory, experience), minimum premium/fees, taxes, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| 🏠 House Insurance Cost Estimator | Transparent, educational estimator for Buildings & Contents with clear multipliers (rebuild cost, contents, construction, roof age, security, flood/wind/crime, occupancy, claims), optional endorsements, excess/deductible effects, taxes, and CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| 🏢 Apartment / Flat Insurance Estimator | Estimate an illustrative annual premium with a transparent factor breakdown (contents, floor level, sprinklers, security, location, excess). Currency & tax settings, CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| 🧳 Renters Insurance Cost Estimator | Educational HO-4/tenant tool estimating an illustrative annual premium with a transparent factor breakdown (contents limit, building type, floor level, security & crime, deductible, liability, endorsements/discounts). Currency & tax settings, CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| 🐾 Pet Insurance Cost Estimator | Estimate an illustrative monthly & annual premium with a transparent factor breakdown (species, breed risk, age, weight, vet-cost index, limit, reimbursement, deductible). CSV export. Private, client-side (not a quote). | Calculator Tools | Launch |
| ⭐ Amortization Calculator | Calculate fixed loan payments, total interest, and generate an amortization schedule. Supports multiple currencies and flexible terms (days, months, years). | Calculator Tools | Launch |
| ⭐ Payback Time Calculator | Measure how long it takes to recover an investment with simple and discounted payback. Supports annual/monthly periods, constant or custom cash flows, CSV export, and a cumulative chart. | Calculator Tools | Launch |
| ⭐ VAT & Sales Tax Calculator | Add or remove VAT (UK/EU) or sales tax (US). Choose standard, reduced, or zero rates—or override with your own value. Fully client-side for privacy. | Calculator Tools | Launch |
| ⭐ Annuity PV/FV & Break-Even | Compute PV/FV for ordinary/due and growing annuities, plus break-even units & revenue, margin, and markup — with annual→per-period rate conversion. 100% client-side. | Calculator Tools | Launch |
| ⭐ Discrete Compounding Calculator | PV/FV for lump sums & ordinary/due annuities, solve for rate or periods, plus APR↔EAR and periodic-rate helpers — 100% client-side. | Calculator Tools | Launch |
| ⭐ Simple Interest Calculator | Calculate simple interest and the total amount instantly. | Calculators | Launch |
| ⭐ Simple vs Compound Interest | Compare simple vs compound interest side-by-side — totals, EAR, and a clean growth chart. | Calculators | Launch |
| ⭐ ROI Calculator | Calculate Return on Investment (ROI) and annualized returns. | Calculators | Launch |
| ⭐ Tip Calculator | Quickly calculate tips, split bills, include/exclude tax, and apply rounding. | Calculators | Launch |
| ⭐ Restaurant Bill Splitter & Tip Calculator | Enter meals, prices, and quantities to split a restaurant check evenly. Add a tip by percent or fixed amount—mobile-friendly and private. | Calculators | Launch |
| ⭐ Shipping Cost Calculator — FOB vs CFR | Compute CIF, duty, VAT, insurance (110% uplift), destination fees, FX conversion, and per-unit landed cost—simple, client-side. | Calculators | Launch |
| ⭐ SIP Calculator | Estimate total invested, wealth gained, and maturity value for systematic investments. | Calculators | Launch |
| ⭐ CD Calculator | Calculate maturity value and interest earned from fixed-term deposits with APY/APR and compounding. | Calculators | Launch |
| ⭐ Discount Rates Calculator | Compare single vs. stacked discounts, compute the equivalent rate, and reverse-calc a target price — with optional sales tax. | Calculators | Launch |
| ⭐ Markup & Margin Calculator | Convert markup ↔ margin, price from cost, profit per unit, and compare scenarios — optional tax display. | Calculators | Launch |
| ⭐ ARR Calculator | Compute Accounting Rate of Return from average profit using initial or average investment, with simple or detailed mode (depreciation & tax). | Calculators | Launch |
| ⭐ One Rep Max Calculator | Estimate your one-repetition max using Epley, Brzycki, and Lombardi formulas. | Calculators | Launch |
| ⭐ Race Split Planner | Plan even or negative splits for 5K/10K/Half/Marathon with per-km/mi targets and CSV export. | Calculators | Launch |
| ⭐ Pace / Speed / Time | Enter any two (pace, speed, time, or distance) and compute the third — km/mi aware with instant conversions and CSV export. | Calculators | Launch |
| ⭐ AOE Calculator | Convert between your local time and AOE (UTC−12). Shows offset difference & day shift. DST-safe and fully client-side. | Time & Date | Launch |
| ⭐ Date Calculator | Find days between dates (incl. business days) or add/subtract days, weeks, months, or years. | Calculators | Launch |
| ⭐ Workdays Calculator | Count workdays between two dates or add/subtract business days — optional holidays supported. | Time & Date | Launch |
| ⭐ All-in-One Unit Converter | Convert length, mass, temperature, area, volume, speed, time, and digital storage — fully client-side for privacy. | Calculators | Launch |
| ⭐ Binary/Hex/Octal Converter | Convert between binary, octal, decimal, and hex — supports negatives, BigInt, prefixes, and 4-bit grouping. 100% client-side for privacy. | Calculators | Launch |
| ⭐ HTML Minifier & Beautifier | Minify HTML for smaller size or beautify for readability — all processed locally in your browser for privacy. | Web Development Tools | Launch |
| ⭐ JavaScript Minifier & Beautifier | Minify JavaScript for faster load times or beautify for readability — fully client-side for privacy. | Web Development Tools | Launch |
| ⭐ YAML to JSON Converter | Convert YAML to JSON instantly in your browser — 100% client-side for privacy and speed. | Web Development Tools | Launch |
| ⭐ Lorem Ipsum Generator | Generate Lorem Ipsum filler text by words, sentences, or paragraphs. Copy as plain, HTML, or Markdown — all client-side. | Web Development Tools | Launch |
| ⭐ Stopwatch | Accurate stopwatch with laps, keyboard shortcuts, and CSV export — 100% client-side for privacy. | Time & Date Tools | Launch |
| ⭐ Sleep Calculator | Find the best bedtimes or wake-up times using 90-minute sleep cycles and a fall-asleep buffer — all client-side for privacy. | Time & Date Tools | Launch |
| ⭐ Countdown Timer | Set hours, minutes, and seconds, then run a smooth countdown with live milliseconds. Presets, Start/Pause/Reset, optional chime — all client-side. | Time & Date Tools | Launch |
| ⭐ Beam Load Calculator | Compute support reactions, shear force, and bending moment diagrams for simply supported beams with point loads and UDLs. | Science & Engineering | Launch |
| ⭐ Fluid Flow Calculator | Calculate Reynolds number, velocity, and pipe diameter. Classify flow regime as laminar, transitional, or turbulent. | Science & Engineering | Launch |
| ⭐ Star Field Planetarium (In Development) | Explore a realistic 3D starry night sky with interactive controls. | Cosmology | Launch |
| ⭐ Redshift to Distance Calculator | Calculate Luminosity, Angular Diameter, and Comoving Distances from Redshift. | Cosmology | Launch |
| ⭐ Space Unit Converter | Instantly convert between Astronomical Units (AU), Light-Years (ly), Parsecs (pc), and Kilometers (km). | Cosmology | Launch |
| ⭐ Cosmology Calculator (Age & Distance) | Calculate the age of the universe and cosmic distances for a given redshift. | Cosmology | Launch |
| ⭐ Rocket Delta-V Calculator | Compute rocket Δv with up to 4 stages using the Tsiolkovsky equation — per-stage and total results with chart. | Science | Launch |
| ⭐ Satellite Orbit Period Calculator | Enter altitude to calculate orbital period, orbital velocity, and revolutions per day using Kepler’s Third Law. | Science | Launch |
| ⭐ Hohmann Transfer Calculator | Compute Δv₁, Δv₂, total Δv, and transfer time between circular orbits. Optional plane-change combination. | Science | Launch |
| ⭐ Conway’s Game of Life | Interactive pixel-grid simulator of Conway’s Game of Life — draw, run, pause, and explore emergent patterns. | Science | Launch |
| ⭐ Ant Colony Simulator | Interactive simulation of ant foraging behavior — watch pheromone trails emerge and tweak evaporation, diffusion, and agent count. | Science | Launch |
| ⭐ Compound Interest Calculator | Project your financial growth with contributions and inflation adjustment. | Calculators | Launch |
| ⭐ Compound Interest Table Generator | Generate tables across rates (0.25%–100%) with custom step, EAR/APR conversion, CSV export, and an interactive graph. | Calculators | Launch |
| ⭐ Salary to Hourly Converter | Convert annual salaries to hourly wages and vice versa, with after-tax estimation. | Calculators | Launch |
| ⭐ Hourly → Annual Salary Calculator | Convert hourly wages into weekly, monthly, and annual salaries with optional after-tax estimate. | Calculators | Launch |
| ⭐ Net Income Calculator | Compute Net Income and NOPAT from EBIT/EBT or a full operating layout; shows EBITDA, EBT, taxes, and margins — 100% client-side. | Calculators | Launch |
| ⭐ Savings Goal / Sinking Fund | Set a target and plan by date or monthly budget — includes progress bar, live chart, and CSV schedule. | Calculators | Launch |
| ⭐ Retirement Planner | Plan for retirement with sliders for savings, age, returns, and inflation — includes live growth chart. | Calculators | Launch |
| ⭐ Salary to Hourly Converter | Convert annual salaries to hourly wages and vice versa, with after-tax estimation. | Calculators | Launch |
| ⭐ Inflation Calculator | Adjust money across years using CPI, compute Fisher inflation and forward rates — all client-side. | Calculators | Launch |
| ⭐ Bond Calculator v1.1 | A simple financial tool to calculate a bond's price, yield, coupon, or maturity. | Calculators | Launch |
| ⭐ Temperature Converter | Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur. | Calculators | Launch |
| ⭐ 2D Distance Calculator | Calculate the distance between two points (x1, y1) and (x2, y2) on a 2D plane. | Calculators | Launch |
| ⭐ 3D Distance Calculator | Calculate the distance between two points (x1, y1, z1) and (x2, y2, z2). | Calculators | Launch |
| ⭐ Tire Size Calculator | Compare two tire sizes by sidewall, diameter, circumference, revs per mile/km, ride height, and speedometer error. | Calculators | Launch |
| ⭐ IP Subnet Calculator | Enter IPv4 or IPv6 CIDR to instantly see network address, range, usable hosts, and total addresses — all calculated client-side. | Calculators | Launch |
| ⭐ Ohm’s Law Calculator | Enter any two values (Voltage, Current, Resistance, Power) to instantly calculate the other two — with unit scaling and step-by-step formulas. 100% client-side. | Science & Engineering | Launch |
| ⭐ AC Power Calculator | Calculate real (P), apparent (S), and reactive (Q) power from voltage, current, and power factor or angle — supports single-phase and three-phase. 100% client-side. | Science & Engineering | Launch |
| ⭐ DC Power Calculator | Compute direct current power with P = V × I — enter any two values (Voltage, Current, Resistance, Power) to instantly find the others. 100% client-side. | Science & Engineering | Launch |
| ⭐ dB / dBm / Watt Converter | Convert between dB, dBm, dBW, and Watts — with optional Vrms/Vpp/Irms from a chosen impedance (e.g., 50 Ω). Enter one value, get the rest. 100% client-side. | Science & Engineering | Launch |
| ⭐ Wavelength ↔ Frequency Calculator | Convert between wavelength (λ) and frequency (f) using λ = c/(n·f) with medium presets (vacuum, air, water, glass) or custom refractive index. Also shows period, wavenumber, and photon energy. 100% client-side. | Science & Engineering | Launch |
| ⭐ Voltage Divider Calculator | Enter any three of Vin, Vout, R1, and R2 to solve the fourth. Includes optional load (RL) simulation, divider current, and resistor power — 100% client-side. | Science & Engineering | Launch |
| ⭐ UPS Runtime & Sizing Calculator | Estimate UPS runtime from load and battery specs, or size a UPS for your equipment — includes VA ↔ W conversion and efficiency. 100% client-side. | Science & Engineering | Launch |
| ⭐ RAID Calculator | Estimate usable capacity, redundancy overhead, efficiency, and fault tolerance for RAID 0, 1, 5, 6, 10, 50 & 60 — 100% client-side. | Science & Engineering | Launch |
| ⭐ Random Number Generator | Generate a random number within a custom range and with a specific number of decimal points. | Random Tools | Launch |
| ⭐ Number Set Generator | Generate integer or decimal sets — unique or with repeats, optional step/grid, sorting, and export. | Random Tools | Launch |
| ⭐ Random Choice Generator | Randomly pick a choice from a list of options. | Random Tools | Launch |
| ⭐ Random letter Generator | Generate a single random letter from the alphabet. | Random Tools | Launch |
| ⭐ Random date Generator | Generate one or more random dates within a specified range. | Random Tools | Launch |
| ⭐ Random IP Address Generator | Generate random IPv4 addresses with options to exclude private and broadcast ranges. | Random Tools | Launch |
| ⭐ Random MAC Address Generator | Generate random MAC (EUI-48) addresses with format & case options, unicast/multicast and U/L bit control, plus optional vendor OUI seeding. | Random Tools | Launch |
| ⭐ List Randomizer | Shuffle a list of items, names, or any text into a random order. | Random Tools | Launch |
| ⭐ Strong Password Generator | Generate a secure, random password with customizable length and character sets. | Random Tools | Launch |
| ⭐ UUID v4 Generator | Generate one or many RFC 4122 compliant UUIDv4 identifiers with color-coded parts. | Random Tools | Launch |
| ⭐ Dice Roller | Rolls a customizable number of d6 dice with a visual display and total sum. | Random Tools | Launch |
| ⭐ Coin Flipper | A simple tool to flip a coin for a heads or tails decision. | Random Tools | Launch |
| ⭐ Bingo Card Generator | Create and print unique, random 5x5 bingo cards with a free space. | Random Tools | Launch |
| 🧩 Printable Sudoku Generator | Generate printable 9×9 Sudoku puzzles (Easy/Medium/Hard). Save as PNG/PDF or print — fully client-side. | Random Tools | Launch |
| 🌀 Random Maze Generator | Generate printable mazes with custom size & cell width, entrance/exit options, solution overlay, and braid (loops). Save as PNG/PDF or print — fully client-side. | Random Tools | Launch |
| ✨ Kaleidoscope Pattern | Soothing, seedable kaleidoscope with gentle rotation. Choose slices, palette, speed & breathing; switch to Draw mode for mirrored strokes with per-stroke colours. Mobile-friendly and 100% client-side. | Random Tools | Launch |
| ⭐ Random Color Palette Generator | Generate harmonizing color palettes for your designs and lock in colors you like. | Random Tools | Launch |
| 🎮 Tic Tac Toe | Classic 3×3 Tic Tac Toe game — play vs friend or computer (Easy, Normal, Unbeatable), choose X/O, track scores. | Games | Launch |
| 🎲 2048 Game | Play the classic 4×4 2048 puzzle — slide tiles, merge numbers, use Undo, and aim for 2048. Smooth, mobile-friendly, ad-light. | Games | Launch |
| 🧩 Sudoku | Play Sudoku — Easy/Medium/Hard with notes, hints, undo, timer, and error highlighting. Mobile-first and privacy-friendly. | Games | Launch |
| 🧠 Mental Math Trainer | Practice percentages, fractions, and squares — play Practice or 60/120s speed rounds with gentle feedback, skip, and local bests. Keyboard-friendly and private. | Games | Launch |
| 🍕 Fraction Pizza | Visualize fractions—choose slices, click to fill, and see fraction/decimal/percent update instantly. Kid-friendly, Challenge mode, privacy-first. | Games | Launch |
| ⌨️ Typing Test | 1-minute typing test with live WPM & accuracy graph, gentle feedback, restart, and a printable certificate. Privacy-first, runs client-side. | Games | Launch |
| 🔎 Word Search | Play or build custom word searches — your word list, grid 8–20, diagonals/backwards options, highlights, and printable PDF/PNG (Classroom pack). Privacy-first, all client-side. | Games | Launch |
| 💣 Minesweeper | Classic Minesweeper with a gentle layout, Flag Mode for touch, right-click flags on desktop, timer, remaining mines, and first-click safety. Runs fully client-side for privacy. | Games | Launch |
| 😀 Emoji Catcher | Gentle typing game for kids: type the word on each falling emoji to catch it. One emoji at a time, slower pace for longer words, lives, and scoring by word length. Fully client-side and private. | Games | Launch |
| 🎯 Pachinko Probability (Galton Board) | Interactive Pachinko/Galton board: drop balls through pegs to see a live distribution. Adjustable rows, bias (p), speed, and spawn rate; pseudo-physics arcs with histogram + binomial overlay, mean/SD stats. 100% client-side. | Games | Launch |
| 🧩 Towers of Hanoi | Calm, privacy-first Hanoi puzzle: manual tap/tap moves or auto-solver. Adjustable disks (3–8), speed control, move counter & optimal target (2^n−1), keyboard & screen-reader friendly. 100% client-side. | Games | Launch |
| 🌀 Maze (Playable) | Calm, privacy-first maze game: swipe or use the D-pad/arrow keys. Seeded generator, sizes (15×15–31×31), timer & steps, crumb trail, and brief hint overlay. Keyboard & screen-reader friendly. 100% client-side. | Games | Launch |
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