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About HushPDF

Private by design

  • Files are processed in your browser — never uploaded, tracked, or stored.
  • Free & open source (MIT) — audit, self-host, or fork it.

Limitations

  • Password-protected PDFs aren’t supported.
  • Up to 50 MB per file (150 MB total when merging).
  • It edits the finished PDF, not the Word or design file it was made from.
  • Forms, annotations, or signatures may not carry over when pages are copied.
  • Signatures are images (e-signatures), not certificate-based digital signatures.
  • Typed text supports Latin, Greek, Cyrillic, Bengali, Devanagari and Arabic.
  • Compression helps most with scanned or image-heavy PDFs.
  • OCR (beta) downloads a language model on first use; your pages stay on your device.
Esc

Redact a PDF

Permanently black out content

How it works

Black out names, numbers and other sensitive details — permanently, not just covered up.

  1. Add one PDF file.
  2. Search for text to mark every match, or drag boxes over areas.
  3. Review the marks on each page.
  4. Choose “Redact & save” — marked pages are flattened so the content is removed.

Questions

Is the redaction permanent?

Yes. Pages with marks are rebuilt as flat images with the areas blacked out, so the underlying text and images no longer exist in the file.

Why isn’t text selectable afterwards?

Redacted pages become images to guarantee removal. Other pages are unchanged. You can run OCR afterwards if you need searchable text.

Does search find scanned text?

No — scanned pages have no text layer. Draw boxes over those areas instead.

Are my files uploaded to a server?

No. Every operation runs locally in your browser using JavaScript (pdf-lib, with page previews from PDF.js). Your documents are never transmitted to us or to any third party, and there are no accounts, watermarks, or file-retention tricks. You can even disconnect from the internet after the page loads and the tools still work.