Is File fingerprint free?

Yes. File fingerprint is completely free, with no sign-up, no watermark and no daily limits.

Are my files uploaded when I use File fingerprint?

No. File fingerprint runs entirely in your browser. Your files are processed on your device and are never sent to a server, so we can't see or keep them.

Does File fingerprint work on my phone?

Yes. It works in modern browsers on Android, iPhone, iPad, Windows, Mac and Linux — no app to install.

Does it work offline?

Yes. After the page has loaded once, the tool keeps working even if you turn off your internet connection.

Is there a file size limit?

There's no fixed limit. Because processing happens on your device, the practical limit is your device's memory — most handle large files comfortably.

File fingerprint

Generate SHA-256, SHA-384 and SHA-1 hashes to prove a file hasn’t changed.

No uploadNo sign-upNo watermark

1Add files
2Adjust
3Download

Drop your PDFs here

or choose files from your device · PDF

Files open in this tab and are never uploaded.

How do I use File fingerprint without uploading?

Open LocalPDF File fingerprint, add your PDFs and click Generate hashes. Everything runs in your browser, so your file is processed on your own device and never uploaded. It's free, needs no account and adds no watermark.

1
Add your PDFs
Drag it onto the page or choose it from your device. It opens in this tab — nothing is uploaded.
2
Check the preview
No settings needed — sensible defaults are applied for you.
3
Generate hashes
Processing runs on your device in seconds. Download the result or continue with another tool.