Free · runs in your browser · never uploaded
Check and remove hidden text from PDF
Short answer
Hidden text (white ink, tiny fonts, off-page text) and fake “black box” redactions can still be searched and copied. Use the privacy checker below for a 0–100 score, then fix with Redact / Deep Clean. Everything runs in your browser.
How it works
- 1
Drop your PDF into the privacy checker above.
- 2
Read the score and any hidden-text or covered-text findings.
- 3
Open Redact or Auto-redact to permanently remove sensitive regions.
- 4
Run Deep Clean to strip metadata and common residue.
- 5
Re-check until the report looks clean, then download your fixed file.
Who needs this
- People who blacked out text in a viewer and need real redaction
- Anyone sharing scanned forms that may still have a text layer
- Legal / HR reviewers checking exports before email
Files never leave your device
The checker and fix tools run locally. Files never leave your device. A high score is guidance — always proofread before sharing.
Limits worth knowing
- Best-effort detection — always proofread before sharing.
- Scanned pages without OCR will not surface text-layer PII.
- Fix tools are separate steps after the report.
Frequently asked questions
What counts as hidden text?
Text that is hard to see but still in the file — white-on-white, tiny fonts, clipped off-page, or sitting under black boxes.Is a black box enough to redact?
No. Drawing a box often leaves the text underneath. Use Redact so pages are rebuilt and the text is destroyed.Does this upload my PDF?
No. Checking and fixing stay in your browser.How do I verify removal?
Re-run the privacy checker, try Find in a PDF reader, and visually review every page.
Written by Sumit · Last updated 23 Oct 2026