Compress PDF: Reduce PDF File Size
Updated · Free · No sign-up · Runs in your browser
Make a PDF smaller so it fits email or upload limits. The photos and scanned images inside are recompressed; text and vector graphics stay untouched.
Everything runs in your browser.
Your files are never uploaded. They are processed only in this browser on your device and are not stored anywhere. Built with open-source pdf-lib and PDF.js (licenses).
One file · up to 50 MB
How to compress a PDF
- Choose a PDF file.
- Pick Light, Medium (recommended) or Strong.
- Click "Compress PDF" and download the smaller file if it shrank.
What gets smaller — and what does not
- Scanned documents and photo-heavy PDFs usually shrink the most.
- PDFs that are mostly text (saved from Word, for example) barely change.
- If the result is not smaller, keep your original file.
Why a no-upload PDF tool is safer
Most online PDF sites upload your file to their servers, process it there and send it back. This tool runs open-source PDF libraries (pdf-lib and PDF.js) directly in your browser, so your documents never leave your device.
Because the work happens on your device, very large files are faster on a computer than on a phone.
Frequently asked questions
Are my files uploaded to a server?
No. Files are opened and processed inside your browser on your own device. Nothing is uploaded, stored or shared, so it is safe for contracts, IDs and bank statements.
How much smaller will my PDF get?
It depends on the images inside. Scans and photo-heavy PDFs often shrink a lot; text-only PDFs hardly change.
Will the text become blurry?
No. Only embedded images are recompressed. Text stays as text, so it remains sharp, searchable and copyable.
Which level should I choose?
Medium works for most files. Use Strong when you need the smallest size, but small text in scans may blur.
What is the size limit?
PDFs up to 50 MB.
Why did nothing change?
The PDF may contain no images, or its images are already well compressed. Try the Strong level or keep the original.