Which method is most secure?

Black Bar is the most secure because it completely overwrites pixels with solid color — there's nothing to recover. Pixelation and low-radius blur can sometimes be partially reversed by image processing or AI. For maximum privacy, use Black Bar.

Can pixelated faces be recovered?

Studies have shown that low-quality pixelation (under 15 px blocks) can be partially reversed by neural networks. For genuine anonymization, use 25+ px pixels — or better, use Black Bar.

Is my image uploaded anywhere?

No — and this is critical for redaction tools. Everything happens in your browser via the Canvas API. We never see, store, or transmit your image.

Can I draw multiple regions?

Yes, unlimited regions per image. Each can use a different style. Use 'Remove Last' to backtrack or 'Clear All' to start over.

Will the censored areas look good in print?

Yes. We export at full original resolution, so censored regions stay sharp at any print size. Black Bar prints crisp, pixelation prints as defined squares, and blur is rendered smoothly.

Can I move or resize a region after drawing?

Not in this version — for changes, use 'Remove Last' and redraw. For complex edits, use the full Photo Editor.

Does it preserve EXIF data?

Currently no — exporting via Canvas strips metadata. This is actually beneficial for redaction (EXIF can leak GPS, timestamps, and camera info). For metadata work, use our EXIF Viewer.

Is this tool legally sufficient for compliance?

Black Bar redaction at full resolution is widely accepted for legal documents, FOIA submissions, and journalistic use. Always verify with your specific jurisdiction or organization's requirements.

Free Online Censor & Redact Tool — Black Bars, Pixelate, or Blur

Whether you're sharing a screenshot, publishing an article, submitting court documents, or just protecting a friend's identity in a photo before posting it, you need a redaction tool you can trust. This censor tool gives you three professional methods — solid black bars, pixelation, or blur — applied to any rectangular regions you draw. Crucially, everything happens inside your browser. Your sensitive image never touches a server, never gets logged, never gets analyzed for ads. Draw rectangles, pick a style, and download. That's it.

What is the Censor & Redact Tool — Black Bar, Pixelate, Blur?

A region-based censorship tool that lets you draw any number of rectangles over an image and censor each region with one of three styles: black bar, pixelation, or blur — all processed locally in your browser.

Key features

Three censorship modes: Black Bar, Pixelate, Blur
Unlimited rectangular regions per image
Adjustable pixel size or blur radius (4–80 px)
Live preview while drawing each region
Per-region style — mix and match in the same image
Remove last region or clear all with one click
Full-resolution export — sharp at any size
100% private — no upload, no tracking, no metadata leak

How it works

Each region you draw is stored as coordinates plus a style. On every render, the tool starts from the original image and re-applies all regions on top — meaning regions are non-destructive in your editing session. On download, regions are scaled to the full-resolution original and applied: black bars are filled with solid color, pixelation downsamples the region then upscales with nearest-neighbor, and blur uses canvas filter blur for a smooth Gaussian effect.

Why use this tool

Cloud-based redaction tools require you to upload your most sensitive content to a server you don't control. That defeats the purpose. This tool runs entirely in your browser — your private photos stay private. It's also free, has no signup, no watermark, and produces output suitable for legal and professional use.

Common use cases

Hiding faces of bystanders in photos before social posting
Redacting names, addresses, or phone numbers in screenshots
Censoring license plates in vehicle photos
Blacking out sensitive info in legal or medical documents
Pixelating screen content in product demos or tutorials
Anonymizing chat logs or private messages
Redacting source material for journalism or whistleblowing

How to use this tool

Upload an Image — Pick any JPG, PNG, or WEBP that contains sensitive information — faces, names, addresses, license plates, screen content, or anything you don't want shared.
Choose Censor Style — Black Bar gives strong, deliberate redaction. Pixelate creates a chunky obscured look. Blur softens — but use higher radius for true privacy.
Adjust Strength — For Pixelate, larger pixel size = stronger obscuring. For Blur, larger radius = stronger anonymization. Black Bar has no strength control.
Draw Regions — Click and drag to draw a rectangle over each area to censor. Add as many regions as you need — there's no limit.
Refine & Download — Use 'Remove Last' or 'Clear All' to refine. When done, Download exports the censored image at full original resolution.

Who should use this

Journalists protecting sources, lawyers redacting exhibits, doctors anonymizing case studies, parents protecting children's privacy online, software demoers hiding test data, anyone screenshotting bank statements or invoices, and anyone who values their privacy.

How to get started

Upload your image. Choose Black Bar mode (the most secure). Click and drag a rectangle over each piece of sensitive content. Repeat for every area. Hit Download.

Best practices

Always use Black Bar for legally-sensitive or highly private info
When using Pixelate, set pixel size to 25+ px for true anonymization
When using Blur, set radius to 25+ px to prevent reversal
Cover slightly more area than needed — partial coverage can leak info
Preview at 100% zoom before downloading to verify coverage
Re-export EXIF stripped (which we do automatically) before sharing

Pro tips

Black Bar is the most secure — pixelation can sometimes be reversed.
For genuine privacy via blur, use radius 25+ px.
For pixelation privacy, use pixel size 25+ px.
Drag from corner to corner — release to commit the region.
You can mix styles: black bar over names, pixelate over faces.
Always preview before downloading — censorship is hard to undo on a published image.

Expert insights

⚡ Maximum Privacy

Black Bar is mathematically irreversible — solid black means zero recoverable data. For any genuinely sensitive content, choose Black Bar over Pixelate or Blur.

🎯 Why Pixelation Can Fail

AI tools can sometimes infer faces from pixelation under 15px because high-frequency hints leak. With 25px+ blocks, that risk drops dramatically.

✓ Journalism Tip

Major newsrooms standardize on Black Bar for legal protection. Pixelation and blur are visually softer but legally riskier for source protection.

⭐ Cover Generously

Always extend your redaction rectangle 5-10px beyond the visible sensitive content. Edges of identifiable info often leak through tight crops.

Limitations to be aware of

Only rectangular regions (no freeform or polygon shapes yet)
Cannot move/resize a region after drawing — must remove and redraw
EXIF metadata is stripped on export (usually a benefit for redaction)
Browser canvas blur is fast but not Photoshop-quality at very large radii
No per-stroke undo beyond 'Remove Last'

Frequently asked questions

Which method is most secure?: Black Bar is the most secure because it completely overwrites pixels with solid color — there's nothing to recover. Pixelation and low-radius blur can sometimes be partially reversed by image processing or AI. For maximum privacy, use Black Bar.
Can pixelated faces be recovered?: Studies have shown that low-quality pixelation (under 15 px blocks) can be partially reversed by neural networks. For genuine anonymization, use 25+ px pixels — or better, use Black Bar.
Is my image uploaded anywhere?: No — and this is critical for redaction tools. Everything happens in your browser via the Canvas API. We never see, store, or transmit your image.
Can I draw multiple regions?: Yes, unlimited regions per image. Each can use a different style. Use 'Remove Last' to backtrack or 'Clear All' to start over.
Will the censored areas look good in print?: Yes. We export at full original resolution, so censored regions stay sharp at any print size. Black Bar prints crisp, pixelation prints as defined squares, and blur is rendered smoothly.
Can I move or resize a region after drawing?: Not in this version — for changes, use 'Remove Last' and redraw. For complex edits, use the full Photo Editor.
Does it preserve EXIF data?: Currently no — exporting via Canvas strips metadata. This is actually beneficial for redaction (EXIF can leak GPS, timestamps, and camera info). For metadata work, use our EXIF Viewer.
Is this tool legally sufficient for compliance?: Black Bar redaction at full resolution is widely accepted for legal documents, FOIA submissions, and journalistic use. Always verify with your specific jurisdiction or organization's requirements.

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