PDkef
On-device

Free PDF tools that run on your device

Merge, sign, split, redact, and compress PDFs without signing up, installing anything, or uploading a single file. Everything runs in your browser, on your phone or computer, so your files never leave your device.

Star us on GitHubMIT licensedWorks offline
Sign & Fill PDF
Add text, check marks, and your signature to a PDF on your phone or computer. Free, no signup, no upload.
Blur & Redact
Blur PDF areas, black out private details, or delete selectable text and images. Your file stays on your device.
Merge PDF
Combine multiple PDFs into one document, in any order, with no page limit or watermark.
PDF to Image
Convert PDF pages into high-quality JPG or PNG images at full resolution, with no watermark.
Image to PDF
Combine JPG or PNG images into one PDF at their original quality, with no watermark.
Split PDF
Extract specific pages or split a PDF into multiple files, with no page limit or watermark.
Compress PDF
Shrink a PDF toward a size limit like 100KB, with quality controls and no daily cap.
Protect & Unlock
Add a password to secure your PDF or remove a known password.
Edit PDF Pages
Remove, rotate, and reorder pages, and add page numbers, all in a single pass.

The form arrives in your chat. Finish it there and send it back.

Your document stays on your phone.

A field trip permission slip arrives as a file in a chat message. Tapping it opens the form right there in the chat. The form's printed heading, its sentence naming the trip's destination, date and times, and the checkbox labels are all there from the start, with blank spaces left for the student's name, the parent's name, an emergency contact number, and any allergies or medical notes. As the page scrolls, those four blanks fill in, both permission checkboxes get checked, and a signature draws itself on the line. A share sheet then slides up carrying the signed file, and back in the chat, the signed form goes out and reads as sent.

Fill it in, sign it, and send it straight back.

An email asks for a copy of a utility bill. Opening it shows several lines of billing details. As the page scrolls, the customer ID blurs until it can't be read, the account number is blacked out, one line is erased to blank paper, and an unrelated row is deleted so the rows below close up. The cleaned-up document is then attached to a reply and sent.

Some of it is nobody's business. Blur it out before you reply.

Turn on airplane mode and give it a try. It still works.

Why I made this

The tools I wanted, shared with everyone

It started with a couple of ordinary errands. Someone close to me needed to combine a stack of course slides into one PDF before an exam, and to sign a summer-camp form that had arrived over WhatsApp. Simple things. But every tool we tried either capped the pages, wanted a subscription and a Windows install, or looked like the last place you would want to send a personal document.

So I built the PDF tools I wanted for myself. Then I realised I wanted to share them. I believe simple, everyday tools like these should just be free and available to everyone, with no account, no paywall, and nothing uploaded to anyone's server.

That is why PDkef runs entirely in your browser. There is no server to send your files to, which is what keeps it private and cheap enough to stay free for good. And it is open source, so you never have to take my word for any of it.

Shlomi

Free ForeverNo limits, no catch
PrivateFiles never leave your device
Open SourceAudit the code yourself
Privacy & Convenience

Work survives restarts and crashes

PDkef auto-saves your in-progress work locally to your browser's secure database. If you close the tab, restart your computer, or experience a crash, your PDF and edits are restored exactly where you left off.

Because it runs 100% on your device, we get "pick up where you left off" without sending a single byte of your file to a server. Available now in Sign & Fill and Redact & Blur.

Run PDkef offline as an app

Because PDkef runs entirely in your web browser with zero server uploads, you can install it on your device and use it just like a native desktop or mobile application, even when you don't have internet access.

Got Questions?

Frequently asked questions

Are the tools really free?

Yes, completely and permanently - no paywalls, no premium tier, no limits, and no watermark on your exported PDFs.

Do I need to sign up or create an account?

No. There is no account, no email, and no trial period. Open a tool and use it immediately.

Are my files uploaded to a server?

No. The tools run 100% locally in your browser, on desktop or mobile. Your PDF files are never sent over the network - they stay on your device the entire time.

Is PDkef open source?

Yes. The entire codebase is open source under the MIT license, so you can inspect exactly what runs on your device.

Transparent & Secure

Open source & privacy

Privacy

Every tool runs 100% locally in your browser. Your files are never uploaded - PDkef has no server to send them to.

Open source

This project is open source under the MIT license. You can view the source code on GitHub. PDkef is built on other open source projects too - see the open source licenses page for the full list.

MIT Licensed