Tamperlens
Check if a PDF redaction actually removed the text
What it does
Black-boxed a name in a PDF and hit save? The text is usually still there. Tamperlens reads the file's paint order and tells you whether a redaction removed the text or just covered it — free, no signup, and the file is parsed in memory, never stored. Behind it: an API that reports structural fraud signals on PDFs, with evidence and the benign explanation for each. Signals, never verdicts.
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Hey everyone, I recently built a free and open-source tool that lets you manually redact PDFs and images right in your browser—no sign-ups, no watermarks. I also added an AI-powered auto-redaction feature to detect and remove sensitive info. Since this part uses external processing (OCR + AI), there are usage limits: you can auto-redact up to 3 single-page PDFs or images for free each day. Higher usage and multi-page support require a paid account. Right now, it works great for removing sensitive details like names, addresses, and emails, but I’d love to get your thoughts: • What redaction…

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