Tool under construction. Launching March 20, 2026. Code will be open sourced under AGPL license. Current version is for testing purposes only.
Modufile
PDF ToolsRedact PDF

Redact PDF

Redact sensitive text and images permanently from your PDF. Works by deleting underlying text and graphics in the chosen area at the PDF content-stream level, not just covering them visually.

Drag and drop your files here

or click to browse. Supports PDFs, PNG, JPG, DOCX, and more.

Private.

Redaction

Click and drag over areas you want to redact. Redactions are professionally applied, permanently removing underlying text and images.

🔒 Professional Redaction. Content under the redaction bars is permanently removed from the file. Text and images are scrubbed from the internal data stream and cannot be recovered.

About Redact PDF

Modufile's Redact PDF tool performs true, permanent redaction — it physically removes the underlying text and image data from the PDF content stream using the MuPDF engine compiled to WebAssembly. Unlike simple black-box overlays that can be removed, Modufile's redaction makes the content unrecoverable by any tool. You can draw redaction boxes manually on any page or use the Find & Redact feature to search for specific text and redact all occurrences at once. The entire process runs locally in your browser, so sensitive documents are never uploaded to a server. This makes it a strong alternative to paid tools like Adobe Acrobat's redaction tool, offering a free, privacy-focused PDF redaction tool for anyone who needs to black out text, remove personal information, or permanently redact sensitive data in a PDF.

Tech Stack

mupdf (WASM)Performs true content-stream redaction, permanently removing text and image data from the PDF
pdfjs-distRenders page previews on canvas and extracts text positions for search-based redaction
pdf-libAssists with coordinate transformation between display and PDF space

Frequently Asked Questions