Redact PDFs without uploading them anywhere.
Black boxes, then a clean PDF. Done in your browser. Your file never touches a server — not ours, not anyone's.
nothing uploaded · no account · no email · text under redactions is unselectable in the output
Adobe, ilovepdf, and smallpdf all upload your file.
Every mainstream redaction tool sends your PDF to a server to process it. That means your file — with the sensitive information you're trying to black out — is transmitted over the internet to a machine you don't control, processed by software you can't audit, and potentially retained by a company whose privacy policy you haven't read.
This tool renders your PDF using PDF.js (Mozilla's open-source renderer, loaded from jsDelivr CDN), lets you draw boxes on a canvas overlay in your own browser, then uses pdf-lib to rebuild each page as a flattened bitmap with the black boxes burned in. The output file is assembled in your browser's memory and handed to you as a download. No bytes leave your machine.
The burned-in guarantee: in the output PDF, each page is a rasterized image. There is no text layer. The redacted content cannot be selected, copied, extracted, or recovered by any PDF viewer — because it doesn't exist in the file as text anymore.
After downloading the redacted PDF, open it in any PDF reader and try to select text under the black boxes. You will get nothing — the text was replaced by pixels, not hidden behind a black overlay. Open DevTools before you drop a file and watch the Network tab: zero uploads fire at any point during this tool's operation.
Most teams redacting PDFs are also storing API keys, passwords, recovery phrases, and access tokens in plain-text Notion docs or shared Slack channels. Septim Vault is an offline-first, AES-256-GCM-encrypted secrets manager that runs entirely in your browser. No server. No login. Export your encrypted file to any cloud backup. $29 once.
Septim Vault — $29 →