How to Redact Sensitive Information in a PDF
Hide private details before sharing a document.
Before sharing, remove sensitive data like account numbers. Proper redaction covers the content so it cannot be recovered.
ChangeMyPDF runs entirely in your browser — your files never leave your device, there's nothing to install, and you can start without an account. Here's exactly how to do it.
Step-by-step
- Open the Edit PDF tool and add your file.
- Use a filled black rectangle (or whiteout) over the data.
- Flatten the PDF so the cover cannot be moved.
- Download and verify the data is gone.
Tips for the best result
- Flatten — a movable box is not real redaction.
- Double-check copied text no longer reveals the data.
Is it safe and free?
Yes. Most ChangeMyPDF tools process files locally in your browser, so documents are never uploaded to a server. Free accounts can run a few operations per hour; a Week Pass or Premium plan removes the limit and ads if you need to do more.
Frequently asked questions
Do my files get uploaded to a server?
For most tools, no — the work happens in your browser, so your documents stay on your device.
Is it really free?
Yes. Free users get a few runs per hour. For unlimited use and no ads, grab a $5 Week Pass or a Premium plan.
Which browsers are supported?
Any modern browser — Chrome, Edge, Firefox, and Safari on desktop and mobile.