Compress a PDF — without uploading it
Make a PDF small enough to email or upload to a portal. Fizzdoc recompresses oversized photos and scans and leaves text and vector graphics untouched.
Free forever · Runs on your device · 0 bytes uploaded
Speed depends on your device; big files on phones take longer. Slow or not working? Report it on GitHub
How to compress PDF
- Add one PDF file.
- Choose Balanced or Strong compression.
- Click “Compress PDF” and download the smaller file.
Also good for
- reduce PDF file size
- compress PDF without losing quality
- make PDF smaller for email
- compress PDF to upload on a portal
- shrink scanned PDF size
Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
Are my files uploaded anywhere?
No. Fizzdoc does the work inside your browser tab, using open-source engines compiled to WebAssembly and JavaScript. Your file is read from your device, processed locally, and the result is saved straight back to your device. You can check this yourself: open your browser’s developer tools, go to the Network tab, and run a job — no request carries your file.
How much smaller will my PDF get?
PDFs made from scans and photos often shrink by 40–80%. Text-only PDFs are usually already compact; if Fizzdoc cannot make a file smaller, it tells you and keeps the original.
Will text become blurry?
No. Only embedded pictures are recompressed. Text, fonts and vector drawings are copied exactly, so text stays sharp and selectable.
Is Fizzdoc free?
Yes, and it stays free: no sign-up, no watermark, no daily limit and no premium tier. Fizzdoc is open source under the Apache-2.0 license, so anyone can run their own copy.
More private tools
- Merge PDFCombine several PDFs into one, in the order you choose.
- Split PDFExtract the pages you need into a new PDF.
- Rotate PDFTurn sideways pages the right way, permanently.
- Delete PDF PagesRemove pages you don’t want to share.
- Unlock PDFSave a copy without the password you know.
- Unlock Aadhaar PDFRemove the password from your e-Aadhaar PDF, on your device.
- Unlock e-PAN PDFRemove the password from your e-PAN card PDF.
- Unlock Bank Statement PDFRemove the password from a bank or credit card statement PDF.