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
Redact email addresses from screenshots
Load a screenshot and click Find sensitive info: email addresses are detected on your device and covered with a solid block. You can also cover anything by hand.
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 redact an email address from a screenshot, open BlurTool, paste the screenshot and click Find sensitive info to detect every address automatically (or draw a solid Cover box over each one by hand), check signatures, headers and quoted replies, then download. A solid cover fully replaces the text so the address cannot be read or recovered. The screenshot is processed locally and never uploaded.
How to hide an email address in a screenshot
Paste the screenshot
Press Ctrl/Cmd+V or drop the file. Solid Cover is already selected.
Find every address
Check the From, To and CC lines, signatures, quoted replies and any avatars that show initials.
Detect or cover each one
Click Find sensitive info to detect addresses automatically, approve them, and add a box by hand for anything it missed. Keep opacity at 100%.
Download
Export a flattened PNG or JPG and share it.
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
- Email threads often repeat addresses in headers, signatures and quoted replies; each copy needs to be covered.
- BlurTool detects email addresses automatically with on-device text recognition (OCR); the screenshot is never uploaded.
- Automatic detection can miss addresses in tiny, blurry or stylized text, so review the image before sharing.
- 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
Why hide email addresses in screenshots?
Visible addresses get scraped for spam and phishing, and sharing another person's address can break their privacy. Covering them takes seconds.
Is blurring an email address enough?
Not reliably. Blurred or lightly pixelated email addresses can often be guessed from their shape and length. Use a solid cover.
Can BlurTool find email addresses automatically?
Yes. Click Find sensitive info and BlurTool reads the text in your screenshot on your device, finds email addresses and phone numbers, and covers the ones you approve. It is part of Pro, and new accounts get a 30-day free trial with no credit card.
Does this work on mobile screenshots?
Yes. BlurTool runs in mobile browsers, and you can add a screenshot from your photo library.
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.
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Free · manual editor
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$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.