Is Redaction checker free?

Yes. Redaction checker is completely free, with no sign-up, no watermark and no daily limits.

Are my files uploaded when I use Redaction checker?

No. Redaction checker 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 Redaction checker 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.

Redaction checker

Finds text still hiding under black boxes and highlights it.

No uploadNo sign-upNo watermark

1Add files
2Adjust
3Download

Drop your PDF here

or choose a file from your device · PDF

Files open in this tab and are never uploaded.

How do I use Redaction checker without uploading?

Open LocalPDF Redaction checker, add your PDF and click Check redactions. 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 PDF
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
Check redactions
Processing runs on your device in seconds. Download the result or continue with another tool.