Secure PDF redaction

After the preview appears, draw directly on the page image: click (or tap), drag, and release to place each black box over sensitive content. Export burns those rectangles into a new PDF—only in your browser.

Add a PDF to redact

local-only

Your file stays on your device; then draw boxes on the page preview to choose what to hide.

Drop files here•or click to browse

Export

Draw at least one rectangle on the preview for each page you want to redact, then Apply. Positions map from the preview into PDF points and are drawn with pdf-lib. Clear all removes every region on every page.

Opaque rectangles hide content visually. Underlying text may still exist in the PDF structure, so Ctrl+F could find words in some viewers until you use a dedicated certified-redaction workflow for legal hold.

no uploads

Upload a PDF — processing stays in your browser; no account or server upload is required.
When the page preview appears, click and drag on the preview image itself to draw rectangles over text or areas to black out—not beside it. Delete a mistake with the trash icon on that box; use Previous/Next for more pages.
Use Clear all to start over, or Apply to burn solid black rectangles into a new PDF with pdf-lib.
Open the downloaded file to verify coverage. For legal-grade removal of searchable text, follow your organization’s redaction policy.

FAQ

Is my PDF uploaded?: No. The file is read and written in your browser tab using pdf-lib; OmniPDF does not receive your document.
Can someone search hidden text after export?: Black rectangles cover content visually, but underlying text may still exist in the PDF. For regulated or legal workflows, use a certified redaction process.
Does it work on mobile?: Yes on modern mobile browsers, though precise dragging is easier with a mouse or stylus on larger screens.

Performance

Since OmniPDF processes files locally using your computer's power (WebAssembly), there is zero upload time. It is 5x faster than cloud-based converters for large files.