Redact PDF Online Without Uploading
"Online PDF redaction" usually means uploading your confidential document to a third-party server that processes it and returns the result. This tool is different: everything runs locally in your browser using PDF.js for rendering and pdf-lib for writing redactions. Your file is never transmitted anywhere.
This distinction matters enormously when the document contains privileged information — attorney-client communications, protected health information under HIPAA, financial data subject to privacy regulations, or national security material. Uploading such documents, even to a well-intentioned service, may create compliance and liability issues.
The tool supports any standard PDF. Load the file, mark the sensitive areas on each page by dragging to draw black boxes, and download the redacted version. Everything happens in your browser tab, with no network requests related to your document.
Works in Chrome, Firefox, Safari, and Edge on Windows, macOS, iOS, and Android. No account, no tracking, no file storage.
Click and drag on the page to mark areas to redact. Marked areas become solid black in the final PDF.
常见问题
- Does my PDF get uploaded?
- No. All redaction happens locally in your browser using pdf-lib. Your file never leaves your device.
- Is the hidden content truly removed?
- The tool overlays solid black rectangles on the PDF content. Standard PDF readers cannot see through them. For legally critical documents, verify the output and consult your legal team.
- Does this work on iPhone and Android?
- Yes. Touch-drag works on the canvas to draw redaction areas. The tool runs in Safari and Chrome on mobile.