Compress PDF — without uploading it anywhere
Your file never leaves this device. No upload, no account, no size games.
Your file never leaves this device. No upload, no account, no size games.
Most "compress PDF" sites send your document to a server, shrink it there, and hand back a download link. PDFfit does the whole job inside the browser tab: it runs Ghostscript — the same engine behind many desktop PDF tools — compiled to WebAssembly. Your PDF is read into memory, rewritten locally, and offered back as a download. Nothing is transmitted, queued, or stored, so there is nothing to delete afterwards.
A practical way to prove it: load the page, disconnect from the network, then compress a file. It still works.
How much you save depends on what is inside the file. Scanned and image-heavy PDFs typically shrink by 60–90%, because the images are downsampled. A PDF that is mostly text is often already close to its floor — if PDFfit cannot make yours smaller, it keeps your original rather than handing back a degraded file.
Contracts, medical records, bank statements, passports, and signed agreements are the documents people most often need to shrink, and the ones they should be most reluctant to upload to an unfamiliar server. Local processing removes that trade-off: privacy is a property of where the code runs, not a promise in a policy document.
Yes. Compressing one file at a time is free, with no daily limits and no account. A one-time purchase unlocks batch compression and the Max preset; the license key is verified offline, so there is no subscription and no phone-home.
No. There is no server component. The PDF is processed in memory on your own device and never leaves it.
The free tier caps the size of a single input file; larger documents are part of Pro. The real ceiling is your device's available memory, since the whole file is held locally while it is rewritten.
Yes — the same tool, one click from your toolbar, still running entirely offline. It is available for Chrome, Edge and Firefox.
Yes, under the AGPL-3.0 license.
Step-by-step instructions · Privacy policy
Every tool in the suite runs entirely on your own device — same approach, different job. Each is also available as a browser extension.