Your files never
leave this device.
Merge, convert, compress, sign and encrypt your PDFs and images without sending them anywhere. Everything happens right in your browser, so there is nothing to install and no account to make.
Drop a PDF to begin
handled in your browser, nothing sent
Most PDF tools upload your files.
KuroPDF doesn't.
We started KuroPDF because your contracts, bank statements and medical records have no business sitting on someone else's server. Here is how we do things differently, and what the usual tools quietly cost you.
Nothing leaves your device
Your files are processed in the browser with WebAssembly. If you want proof, open DevTools, switch to the Network tab, and watch nothing get sent.
Big files are fine, and so is doing it all day
Run a 500 page PDF through it or convert 200 photos in one go. There is no throttle and no upgrade wall, so the only real limit is your own computer.
It keeps working with no internet
Install it as an app and every tool still runs when you are offline, whether you are on a flight or somewhere with no signal.
Encryption that actually means something
Password protection uses AES-256 through a WebAssembly build of qpdf, and your password stays on your machine the whole time.
Free to use, no account needed
There is no login wall, no email to hand over and no "continue with Google" popup. Open the site, do what you came to do, close the tab.
Thirty tools, one promise.
All the everyday jobs you keep needing, without the upload bar, the watermark or the daily limit.
Merge PDF
Combine files into one, in whatever order you like.
Compress PDF
Shrink the size, with an option to hit a target.
Image to PDF
Turn JPG, PNG, WebP and more into one PDF.
PDF to Image
Save your pages out as PNG, JPG or WebP.
Sign & Stamp
Draw or drop a signature wherever you need it.
Encrypt
Lock a file with AES-256, powered by qpdf.
Split & Extract
Pull out the pages or ranges you want.
OCR Text
Make a scan searchable, right on your device.
Plus 22 more, including rotate, watermark, redact, organize and HEIC or AVIF conversion.
What the other tools
quietly cost you.
| 黒 KuroPDF | Smallpdf | iLovePDF | Adobe | |
|---|---|---|---|---|
| Files stay on device | ✓ | ✕ | ✕ | ✕ |
| Works offline | ✓ | ✕ | ✕ | ✕ |
| Daily task limit | None | 2 a day | Limited | Limited |
| File size cap | None | Limited | 100 MB | Limited |
| Account required | No | Yes | Yes | Yes |
| Yearly price | $0 | $108 | $84 | $239 |
You do not have to take our word for it. Open your Network tab and watch.
Go on, ask away.
Is KuroPDF really free? +
Are my files uploaded to a server? +
What file formats can I use? +
Does it work offline? +
Is the encryption actually secure? +
Can I process a batch of files at once? +
Privacy is the
whole point here.
Open the studio and run your first tool in a few seconds, with nothing to upload and nobody to sign up with.
Open the Studio ↗