One click. No rectangle drag.
Missed something? Click the word. Done.
Drop your PDFs in Cover first. Be assured your private info is removed (redacted) before exposing it to ChatGPT or Claude.
Below are all great questions to ask your favorite Ai. But why expose you, or your client's identity to Ai when you don't have to?
Missed something? Click the word. Done.
Ai can answer the same question whether or not your address is in the document.
Redact your bank account number on page 1; we cover every other instance automatically.
Cover's intuitive redaction editor saves you minutes compared to Adobe Acrobat or Apple's Preview app. Watch below:
Real recording, to be produced. Both halves loop independently so the right side feels long.
The best local Ai LLMs have some big problems: they make a mess of your document by adding too many over-redactions. How are you going to clean them all up? Re-prompt the Ai 78 times for each word that needs correcting?
Adobe Acrobat and Preview are cumbersome to use. They make sure you're wasting your time drawing rectangles.
| Engine | Personal info caught | Wrongly hidden | Avg time / PDF |
|---|---|---|---|
| Cover | 94% | 27 | 17s |
| qwen3 | 82% | 138 | 7.6m |
| Phi-4 Microsoft | 69% | 99 | 1.4m |
| Qwen 2.5 Alibaba | 65% | 167 | 51s |
| Llama 3.1 Meta | 60% | 271 | 47s |
| openmed-privacy-filter-nemotron | 57% | 1221 | 15s |
| openai-privacy-filter | 43% | 687 | 36s |
| Gemma 4 12B Google | 3% | 1 | 23.2m |
| Gemma 3 Google | 3% | 0 | 0s |
| Cover | Preview | Acrobat | |
|---|---|---|---|
| Finds personal info on its own | ✓ | ✗ | Partial |
| Zero setup, no checkboxes | ✓ | N/A | ✗ |
| Works without the internet | ✓ | ✓ | Partial |
| Click a word to redact it | ✓ | ✗ | ✗ |
| Click a redaction to remove it | ✓ | ✗ | ✗ |
| Remove a whole group of redactions at once | ✓ | ✗ | ✗ |
| Un-redact whole pages at once | ✓ | ✗ | ✗ |
| Works on scans and photos | ✓ | ✗ | ✓ |
| Handles a whole folder | ✓ | ✗ | ✓ |
| Output still usable when shared | ✓ | ✓ | ✓ |
| Price | From $$ | Free | $23.99/mo |
Acrobat can technically do it, but it's all manual, $23.99 a month, and you still have to find every private detail yourself.
See the complete bake-off data: every model, every document, every page side by side →
While Cover is in beta, feel free to download it and redact as many PDFs as you'd like. Any feedback you have is much appreciated.
Beta
Free
The current development build. Free to use while we build toward release.
Consumer
$$ one-time
For individuals redacting PDFs, without the redaction list and compliance tools.
Enterprise
$$$ / year
For legal, compliance, and teams that have to prove what they redacted, and why.
Sent setup tips to your inbox too.