Sensitive info mosaic
Draw boxes over sensitive parts of an image to pixelate them before sharing.
The sensitive info mosaic tool lets you drag directly over any part of an uploaded image to pixelate that area, so you can hide an ID number, address, face, or other sensitive detail before sharing a screenshot or photo — entirely in your browser.
Click to choose an image, or drag one in here
One image at a time
Drag on the image to pixelate an area.
How to use
- Upload an image, then drag over any area you want to hide (an ID number, address, etc.).
- Adjust pixelation strength if you want it stronger or lighter.
- Click "Download" to save the result.
Common use scenarios
- Hiding a personal ID number or account number in a screenshot before posting it for help.
- Blurring out a home address or license plate before sharing a photo publicly.
- Redacting a face or other identifying detail from an image.
- Covering up sensitive text in a document photo before sending it to someone.
✓Content & verification reviewed: 2026-08-27
How we verify Sensitive info mosaic
How to confirm the redaction is thorough before sharing the result.
Pixelation is applied directly to the image, not as an overlay
Once you drag over an area, that region's actual pixels are replaced with a blocky, low-resolution version — it isn't a separate layer sitting on top that could be removed, so the original detail is gone from the exported file.
Undo removes only the most recent box, in order
Each pixelation action is tracked separately, so "undo" steps back through your redactions one at a time in reverse order — it won't jump back further than the single most recent change.
Stronger pixelation blocks more of the underlying detail
A higher pixelation strength uses larger blocks, making the hidden content harder to make out even under zoom — for genuinely sensitive information, err toward a stronger setting rather than a lighter one.
Before you rely on the result
- You've zoomed in on your redacted areas to confirm no readable detail remains, especially for small text.
- You've covered every sensitive area in the image, not just the most obvious one.
- You've used a strong enough pixelation setting that the hidden content isn't guessable even zoomed in.
- You've downloaded and reviewed the final result before deleting your original working copy, in case you need to redo a redaction.
Who this is for
- Anyone hiding a personal ID or account number in a screenshot before posting it publicly.
- People blurring a home address or license plate before sharing a photo.
- Anyone redacting a face or identifying detail from an image.
- People covering sensitive text in a document photo before sending it.
Real-world examples
Redacting a screenshot before posting for help
Someone about to post a screenshot in a public forum pixelates their account number or email address before sharing it.
Sharing a photo with a visible address or plate
A person about to post a photo publicly pixelates a visible house number, street sign, or license plate first.
Sending a partial document photo
Someone sending a photo of a document to a third party pixelates the fields that aren't relevant to what they're actually sharing it for.
Limitations
- Pixelation is a one-way, destructive blur — once downloaded, the original pixels in that area aren't recoverable from the output file, so double check placement before sharing.
Frequently asked questions
Is the pixelation reversible by whoever receives the image?
No — the pixelated pixels replace the original detail directly in the exported file; there's no way to recover the hidden content from the output image alone.
How do I know if my pixelation is strong enough?
Zoom into the redacted area yourself after applying it — if you genuinely can't make out the original content even zoomed in, it's likely strong enough; if you can still guess it, increase the strength and redo it.
Can I undo more than one redaction at a time?
Undo removes one redaction at a time, in reverse order — click it multiple times to step back through several redactions.
Does this upload my image anywhere?
No — the entire process, from loading the image to pixelating and downloading, happens locally in your browser.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-27
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