Compress PDF Online — Free, No Upload Needed

About the PDF Compressor

Large PDF files can be hard to email, upload, or store. This PDF compressor helps you reduce file size quickly so your documents fit within common limits without giving up readability. It is useful for everything from sharing resumes and invoices to submitting forms and reports. Best of all, the compression runs locally in your browser, so your file stays on your device.

In simple terms, PDF compression works by making the file more efficient. A PDF can include images, fonts, and layout data. When you compress it, the tool looks for ways to reduce the space those elements take up. Images can be optimized, redundant data can be removed, and the internal structure can be streamlined. The goal is to keep the document looking the same while shrinking the overall size.

Here is how to use the tool step by step:

1. Drop your PDF into the upload area or click to select a file.
2. Preview pages to confirm you picked the right document.
3. Choose a compression level that balances size and quality.
4. Adjust image quality if your PDF is photo-heavy.
5. Click download to save the compressed PDF to your device.

This is handy when an email attachment limit is around 25 MB or when online portals only accept 5 to 10 MB. It also helps when you want faster sharing over messaging apps or need to store many PDFs in a small space. For scanned documents, higher compression with lower image quality can make a big difference. For text-heavy documents, a lighter compression level often preserves crisp text while still trimming the file size.

Because everything happens locally, you get privacy and speed. Your PDF is not uploaded to a server, which is important for sensitive documents like contracts, medical forms, or financial statements. Keep in mind that compression results vary. Files that already have optimized images may not shrink dramatically, while large scans often compress well.

Note: Compression is most effective when images can be reduced or re-encoded. If your PDF is already optimized, the size drop may be smaller even at higher settings.