Black out parts of an image
Cover parts of an image with solid black boxes — ideal for documents and screenshots. The blackout is permanent in the exported file and runs entirely in your browser.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
Black boxes that keep the document readable
Blacking out parts of an image hides exactly the sensitive fields while preserving the document’s structure — recipients still see what kind of paper it is, which sections exist, and that nothing else was altered. That is why contracts, invoices, IDs and statements are blacked out rather than cropped to fragments.
As many boxes as the page needs
Draw as many rectangles as there are fields to hide; each stays adjustable until export, then all are permanently baked into the pixels. Ctrl+Z undoes a misplaced box. The document — usually the most sensitive kind of image there is — never leaves your browser.
Frequently asked questions
- Is my image uploaded to blur it?
- No. The blurring happens entirely in your browser. The original, unredacted image never leaves your device — which is the whole point of a privacy tool.
- Can the blur be reversed?
- No. Blur, pixelation and redaction are baked into the exported image’s pixels. The hidden information cannot be recovered from the downloaded file.
- What is the difference between blur, pixelate and redact?
- Blur softens the area, pixelate replaces it with coarse blocks, and redact covers it with solid black. For maximum certainty on text (like account numbers), redaction is the safest choice.
- Can I adjust a region after drawing it?
- Yes. Click any region to select it, then drag to move it, use the handles to resize, or press Delete to remove it. Ctrl+Z undoes your last change.
- Which formats can I download?
- PNG (lossless), JPG and WebP.