All tools

Blur or pixelate part of an image

Drag a box over anything private (an email address, a customer name, an access token) and choose blur, pixelate or a solid redaction box. The effect is baked into the exported pixels.

How it works

  1. 1

    Load the screenshot

    Paste it, drop it, or choose the file. The image stays in your browser tab.

  2. 2

    Pick blur, pixelate or redact

    Blur (B) softens, Pixelate (X) makes mosaic blocks, and Redact (D) covers with solid black. Drag over the area.

  3. 3

    Export the safe copy

    Download a new PNG or JPG. The original pixels under the box are not in the exported file.

Hiding information safely

  • For passwords, tokens and card numbers, use Redact. Blurred or pixelated text can sometimes be reconstructed (see the explainer below).
  • Cover the whole field plus a margin, so text length and shape don’t give the value away.
  • Use a larger size for pixelation. Bigger blocks carry less information than small ones.
  • Check the URL bar, browser tabs, notification toasts and avatars: they leak names and internal URLs more often than the page itself.
  • Crop instead of blurring when the sensitive part is at the edge. Removed pixels can’t leak.

Why pixelated text isn’t safe: try it

The canvas below hides a 4-digit PIN. The list checks six guesses by pixelating each one the same way and comparing the blocks, the idea behind the open-source tool Depix and Bishop Fox’s Unredacter.

Move the slider to see how well each guess matches.

Background: in 2020 Sipke Mellema published Depix, which reconstructs pixelated text by matching blocks against a rendered search image; in 2022 Bishop Fox released Unredacter, showing the same for pixelation in documents. The lesson both teach: a solid box is the only redaction that leaks nothing.

Questions people ask

How do I blur part of an image online?
Load the image in the editor above, choose Blur (B), and drag a box over the area. Download the result. Only the area inside the box is blurred.
Is pixelating or blurring enough to hide a password?
Not reliably. Tools such as Depix and Bishop Fox’s Unredacter have shown that pixelated text can be recovered when the font and block size are known. Use Redact (a solid box) for secrets.
Can someone remove the blur from the downloaded image?
The exported file contains only the blurred pixels, not the original, so there is no layer to “undo”. The risk is reconstruction by guessing, which Redact prevents.
Can I blur faces in a photo?
Yes. Drag a Blur or Pixelate box over each face. For identification-proof results use a large size or Redact.
Does it upload my image?
No. Blurring happens on a canvas in your browser. Nothing is sent to a server.