Redact PDFs. Strip photo metadata. Compress images.
Nothing leaves
your device.
Most tools for this upload your file to a server and ask you to trust what happens next. blakstrip does the work in your browser. Open the network panel before you start, and watch it stay empty.
Fully private · free · works offline
The tools
Redact a PDF
Remove text and hidden data for good, instead of covering it with a box
quarterly-report.pdf · 8 found
- Medium severity: Title metadataQuarterly Report
- Medium severity: Author metadataJane Author
- Medium severity: Subject metadataConfidential
- Medium severity: Keywords metadataconfidential internal
- Medium severity: Producer metadatablakstrip-fixture
and 3 more
Remove image metadata
See what a picture is carrying about you, then remove it without touching the image
holiday.jpg · 4 found
- High severity: Location where this photo was taken51.50897, -0.12879
- Medium severity: Camera or phone usedACME Pixelbird 9
- Medium severity: When this photo was taken2024:06:11 14:02:37
- Medium severity: Software that last wrote this filePixelbird Camera 4.2
Compress an image
Make a picture smaller in your browser, and judge the result at full size before you keep it
holiday.jpg · 1200 × 900 · 506.6 KB
- Smallest53.1 KB WEBP · 90% smaller
- Balanced116.8 KB JPEG · 77% smaller
- Best quality386.2 KB JPEG · 24% smaller
Those are real results. The findings come from these tools reading sample files while this page was built, and the sizes from the same encoders the compressor ships, run in a browser and checked in with the tests. Not a screenshot.
Verify it yourself
The panel stays empty because the page is served under a Content-Security-Policy that forbids the request outright, so it is not a promise the code has to keep. Then turn off your wifi and put a file through again.
Every tool also re-reads the file it just produced and reports what is still in it, including anything it could not remove. A tool that says "done" and expects to be believed is worth less than one that shows its work.