Photo 1 - A person's face
Pixelate: just the face itself - the hair, ears, and background stay exactly as they are.
No sign-up · Runs 100% in your browser
Hide sensitive info. Share with confidence.
Blur, pixelate, or cover private details in screenshots and images in seconds.
See it in action
Drag the slider
Email, phone number and order number covered. All names are fictional.
Drag & drop an image here
or paste from your clipboard (Ctrl/Cmd + V) anywhere on this page
PNG, JPG, or WebP · max 20 MB · max 8000 × 8000 px · 40 megapixels · no account needed
Try an example first
Real photos and documents, each shown as actual images: Before is the original, After is the same image with the effect really applied. Open one and try it yourself.
Photos - faces, people & animals
A face close-up, a full person, and an animal. Only the subject itself is pixelated in each “After” image - everything else in the photo stays visible and unchanged, and every photo is shown in full, never cropped.
Photo 2 - A full person
Pixelate: the whole figure, head to toe, so the person cannot be recognised.
Photo 3 - An animal (dog)
Pixelate: only the dog's head - its body and the sunny field around it stay exactly as they are.
Documents & screenshots
A chat, an invoice, and an email thread, all with made-up names and numbers, with solid covers over the private details.
Example 1 - Support chat
Hide: the customer's email, phone number, and order number.
Preparing the before / after images…
Example 2 - Invoice
Hide: the billing email, account number, and total due.
Preparing the before / after images…
Example 3 - Email thread
Hide: both email addresses and the one-time sign-in code.
Preparing the before / after images…
Prefer the numbers dashboard? - revenue figures, a fictional email, phone, and API key to cover.
Quick answer
To hide sensitive information in a screenshot, open BlurTool, drop in the image, draw a box over each private detail, choose Cover, Blur or Pixelate, then download. Everything runs in your browser, so the image is never uploaded. For passwords, API keys and account numbers, use the solid Cover effect at 100% opacity, because blur and pixelation can sometimes be reversed.
How to redact a screenshot in BlurTool
Add the image
Drop, paste (Ctrl/Cmd+V) or choose a PNG, JPG or WebP file. It opens locally in your browser.
Draw over private details
Drag a box over each email, name, number, key or face. Move and resize boxes until they fully cover the content.
Pick the effect
Cover (solid block) for secrets, Blur for soft background details, Pixelate for faces and figures. Keep opacity at 100% to fully hide.
Check and download
Hold to compare with the original, then download a flattened PNG or JPG at full resolution.
Cover vs blur vs pixelate
| Effect | What it does | Best for | Safe for secrets? |
|---|---|---|---|
| Cover | Replaces the area with a solid opaque block | Passwords, API keys, card and account numbers, emails | Yes, at 100% opacity |
| Pixelate | Replaces the area with large single-color blocks | Faces, people, license plates in photos | Not for short text; use large blocks |
| Blur | Smooths the area with a Gaussian blur | Backgrounds and non-critical details | No, light blur can be reversed |
Key facts
- BlurTool processes images locally in the browser; the image file is never uploaded to a server.
- Exports are flattened PNG or JPG files at the original resolution, with no layers and no copied EXIF metadata.
- BlurTool accepts PNG, JPG or WebP images up to 20 MB, 8000 px per side and 40 megapixels.
- The manual editor is free and needs no account or sign-up.
Frequently asked questions
Is BlurTool free?
Yes. The manual editor (cover, blur, pixelate, full-resolution export) is free with no account. Pro ($9/month) adds automatic detection of emails and phone numbers, batch processing and saved presets, and every new account gets a 30-day Pro trial with no credit card.
Are my images uploaded?
No. BlurTool edits and exports images entirely in your browser. The server only keeps anonymous counters such as how many regions an export had, never image content or file names.
Which effect should I use for sensitive text?
Use the solid Cover effect at 100% opacity. Blur and pixelation reduce detail but can sometimes be partially reversed, especially on short strings like codes or card numbers.
Does the downloaded file keep the original underneath?
No. The export is a single flattened image re-encoded from the edited pixels, so there is no hidden layer and no original metadata to recover.
More answers on the Help and FAQ page.
Everything you need to share safely
The manual editor is free forever. Advanced automation is coming with Pro.
Manual redaction editor
FREEDraw, move, and resize boxes over anything private. Zoom, pan, undo/redo, and hold-to-compare included.
Cover · Blur · Pixelate
FREEThree effects per region, with strength and an opacity slider - 100%, 75%, 50%, or 25% - baked into the export.
Private by design
FREEEditing and export run locally in your browser. No image upload, no original layers or metadata in downloads.
Auto detection
PROUNDER CONSTRUCTIONFinds emails, phone numbers and your own watch-words on your device, then covers the ones you approve.
Included in the 30-day free trial.
Bulk / Batch processing
PROUNDER CONSTRUCTIONRedact many screenshots at once with the same settings, review each one, and export the set as a ZIP.
Included in the 30-day free trial.
Saved presets
PROUNDER CONSTRUCTIONSave your effect, opacity, color, and export settings once - then reuse them on every new image.
Included in the 30-day free trial.
Free for manual editing. Pro for automation.
Start free with the full manual editor - no account, no card. Pro adds auto detection, batch processing and saved presets. Every new account gets 30 days of Pro free, with no credit card.
$0
Free · manual editor
available now
$9/mo
Pro · 30-day free trial
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For the screenshots you share every day
Revenue dashboards, sale threads and buyer chats, support tickets, invoices, and email threads all hit the same problem: one visible email, API key, or phone number can undo the whole post. The default here is a solid cover - the only effect that guarantees nothing shows through - with blur and pixelate available for softer details. New to it? Open one of the photo or document examples above and practise first.
Your next screenshot is one cover away from safe.
Open the free editor, drop in an image, and download a clean copy at full resolution - no account, no upload, no watermark.