Add a screenshot, drag a box over anything that shouldn't be seen, and download a flattened PNG. Everything happens on this page in your browser, and the image is not uploaded anywhere. I set the tool to Black box by default because it's the only one of the three covers that leaves nothing of the original behind.
Drag across the image to cover an area. Each drag adds one cover.
How to use it
- Add the image. Choose a file, drop one on the panel, or paste a copied screenshot with Ctrl+V (Cmd+V on a Mac).
- Pick a cover and drag. Each drag adds one covered area, and Undo (or Ctrl+Z / Cmd+Z) removes the last one.
- Download or copy. Download PNG saves a new file. Copy image puts it on the clipboard for a chat, email or support ticket, in browsers that allow it.
- Check the result. Open the downloaded file in a different viewer and look at every covered edge at full size before you send it.
Which cover to use
| Cover | Use it for | Avoid it for |
|---|---|---|
| Black box | Passwords, one-time codes, card and account numbers, email addresses, names, anything you'd regret leaking | Nothing; it's the safe default |
| Pixelate | Faces, avatars, thumbnails, background windows | Text that must stay unreadable |
| Blur | Softening clutter so the important part stands out | Any secret |
Blur and pixelation keep part of what they hide. A 2016 study of blurred and pixelated text recovered obscured content in its tests, which is why a higher Strength setting is no substitute for a black box. The full redaction checklist covers what else tends to slip through, from notification previews to open browser tabs.
What the downloaded file contains
Only pixels. The PNG is drawn fresh from the edited image, so a covered area is replaced in the file itself instead of sitting on top as a movable layer, and camera, location and date fields from your original don't carry over. The screenshot metadata guide shows how to read a file's fields with ExifTool if you want to confirm that on your own export.
Very large captures, above 16 megapixels, are scaled down first so phone browsers can handle them, and the tool tells you the new size when that happens.
Redacting screenshots every day?
A browser tool is fine for the odd screenshot. If covering details is part of your routine, I'd rather do it where the capture already lands: Snagit's Blur tool has a solid black option, and the Snagit blur and redact guide walks through exporting a flattened copy. Without Snagit, the built-in ways to blur a screenshot on Windows, Mac, iPhone and Android do the job too.