Try it with your wifi off — seriously
PDF tools that never upload your files
Merge, split, compress, redact and sign PDFs entirely in your browser. No uploads, no account, no tracking — your documents stay on your device, provably.
All tools
Every one runs 100% locally. Free, no sign-up.
Merge PDF files
Combine multiple PDFs into one — in order, in seconds, offline.
Split PDF
Split a PDF into separate files — every page, or the ranges you choose.
Extract PDF pages
Pull specific pages out of a PDF into a new document.
Delete PDF pages
Remove pages from a PDF and download the cleaned-up file.
Rotate PDF
Rotate all pages or specific pages by 90°, 180°, or 270°.
Compress PDF
Shrink scanned PDFs dramatically — everything stays on your device.
Redact PDFFlagship
True redaction — text is destroyed, not hidden. With a verification report.
Redaction checker
Find text hiding under black boxes, redaction marks that were never applied, and leftover metadata.
Sign PDF
Draw your signature and place it on any page. Nothing is uploaded.
Unlock PDF
Remove a password you know — the password never leaves your device.
Protect PDF
Add AES-256 password protection — without the file going anywhere.
Images to PDF
Turn JPG and PNG images into a single PDF, in the order you choose.
PDF to images
Export every page of a PDF as a high-quality JPG image.
Watermark PDF
Stamp CONFIDENTIAL, DRAFT, or any text across every page.
Add page numbers
Number every page of your PDF, centered at the bottom.
Guides
Step by step, with the checks that prove nothing was uploaded.
We tested 14 online PDF tools. Which ones actually upload your file?
Every PDF site says your files are safe. We measured what they send: the same two synthetic PDFs, every request body counted, then the same job with the wifi off. The results, per site, with the method to reproduce them.
How to edit a PDF without uploading it
Most 'edit a PDF' jobs are one of seven things, and all seven can be done in your browser without the file leaving your machine. Which tool for which job, and the honest answer on editing the text itself.
How to merge PDFs without uploading them
Merging is the most common reason people upload confidential paperwork to a stranger's server. It doesn't need one. Step by step, with the checks that prove it.
How to redact a PDF without uploading it
Uploading a document to redact it is backwards: the whole point is that the contents are sensitive. How to do it locally, and why a black rectangle is not a redaction.
How to sign a PDF without uploading it
A signature page shouldn't cost you an account and a copy of the contract on someone's server. The local way, and the honest line between a drawn signature and a digital certificate.
Why “private” actually means something here
Every popular PDF site works by uploading your document to their server. Their privacy is a policy — a promise that could change or be breached. Ours is an architecture: this site is static files plus your browser. There is no endpoint that can receive a document, and our security policy blocks the site from talking to any other server. If you handle contracts, medical records, HR files or client data, that difference is the whole point.
PDFAirlock vs. the upload-everything sites
| PDFAirlock | Typical PDF site | |
|---|---|---|
| Files uploaded to a server? | Never | Yes, every file |
| Works offline / on a plane? | Yes | No |
| Account required? | No | For most features |
| Pricing | Free — never a subscription | $7–20 every month |
| Verifiable privacy? | Check the network tab | Trust their policy |
See the detailed comparison vs iLovePDF, Smallpdf, Adobe, PDF24 and more →