ThumbCraftedTry Free Editor
Free · Private · No Upload

Pixelate or Blur Part of an Image

Hide a face, a number plate, a username or a screen you should not have shown.

Draw a box over each thing to hide and choose pixelate, blur or a solid bar for it. The rest of the picture is left exactly as it was, and the download is the full resolution you started with. Hiding text? Use the solid bar: it is the one that cannot be undone.

Drop or click to upload

Drag & drop or paste a screenshot

JPG, PNG, WebP, 25MB max

No upload Full resolution out No watermark

Made for screenshots and frames before they go in a thumbnail or a post: bystanders' faces, car plates, DMs, email addresses, notification banners, an unreleased product on a screen. To soften a whole background instead, use Blur Background.

Draw over what to hide

Drag on the picture to draw a box. Drag a box to move it, drag a corner dot to resize it.

Box settings

No boxes yet

Draw a box on the picture, or press Add box. Tap a box to change how it hides what is under it.

16 px

How it works in three steps

1

Upload or paste

Drop a photo, a video frame or a screenshot, or paste one straight from the clipboard. It is read into your browser and never sent anywhere.

2

Box what to hide

Drag a box over each face, plate or line of text. Pick pixelate, blur or solid bar for each one and set its strength; the preview updates as you go.

3

Download at full size

Save a PNG or JPG at the same width and height as your original, or open it in the editor to add your title.

Pixelate, blur or bar: which one

All three hide what is under the box. They differ in how they look and in how much of the original survives in the pixels.

ModeWhat it does to the pixelsUse it for
PixelateSplits the box into square blocks and paints each block the average colour of its pixels. Block size is in pixels of your original image.Faces and plates in photos, where the classic mosaic look is what viewers expect. Use big blocks: a block should be larger than the eye or the character it covers.
BlurAverages every pixel with its neighbours, three passes of a box blur at the radius you set. Pixels just outside the box feed the average, so the edge of the box blends in.Backgrounds, screens and crowds where a mosaic would look loud. Softer on the eye in a thumbnail.
Solid barReplaces every pixel in the box with one flat colour. Nothing of the original is left inside it.Text of any kind: names, handles, emails, phone numbers, addresses, card numbers, passwords, chat messages.

Why the solid bar is the safe choice for text

Blur and pixelate do not delete information, they mix it. Each output pixel is still an average of the pixels that were there. For a face that is usually enough, because there are millions of possible faces. Text is different: a screenshot uses a known font at a known size, and the set of possible words is small. Someone who wants to read it can draw candidate words in the same font, blur or pixelate them the same way, and see which one matches. That has been done to pixelated passwords and blurred document numbers in public, with free software. Small blocks and small radii make it easier.

A solid bar has nothing to match against. Every pixel in the box becomes the same colour, so the download carries no trace of what was under it. If what you are hiding is text that matters, use the bar. If you want the look of a mosaic for style, put a bar over the text first and pixelate around it.

What ends up in the file

The download is a new, flat image drawn from a canvas: there are no layers, no undo history and no hidden copy of the original pixels under your boxes. Camera metadata such as GPS position is not carried over either. The original file you started with is untouched on your device, so share the new one, and remember that anything you posted before the edit is still out there in its first form.

The work happens in your browser. The line under the upload box counts the bytes of request body that leave the page while you work, which is the right thing to check when the picture is something you are trying to keep private in the first place.

Censoring for a thumbnail or a clip

For a thumbnail, a blurred box behind your title often looks better than a mosaic and draws less attention. For a screenshot in a video, the bar is the honest choice for anything personal. If the same frame needs more work, send it on to the editor; to pull the frame out of a video first, use Video to JPG.

Censoring Questions

Is my image uploaded?
No. The image is decoded into a canvas in your browser, the boxes are applied there and the download is built there. The line under the upload box counts the bytes of request body that leave the page while you work, and you can check it in your browser's network panel.
Can blurred or pixelated text be read again?
Sometimes, yes. Blur and pixelate mix the pixels rather than remove them, and text in a known font can be matched by blurring or pixelating candidate words the same way and comparing. Short text such as a name, a number or a password, under small blocks or a small blur, is the easiest to recover. The solid bar replaces every pixel with one colour and leaves nothing to match, so use it for any text you need to hide.
Which mode should I use for a face?
Pixelate with blocks bigger than the eyes, or a strong blur, covers a face for most purposes. If the person must not be identifiable at all, for example a child or someone at risk, use a solid bar, or crop them out.
Is the original still hidden under the box in the file?
No. The download is a single flat image with no layers. Inside a solid bar every pixel is the bar colour; inside a pixelated or blurred box the pixels are the mixed values you see. Your original file is not changed, so do not share that one.
Can I hide several things at once?
Yes. Draw as many boxes as you need, up to 50, and give each its own mode and strength. Use these settings on every box copies the selected box's mode, strength and colour to all of them.
Does it work on a phone?
Yes. Drag with one finger on the picture to draw a box, drag the box to move it and drag a corner dot to resize it; each dot has a 44 by 44 pixel touch area. The picture does not scroll while your finger is on it, so scroll from the page around it.
What are the limits?
25 MB per image, in any image your browser can open (JPG, PNG, WebP, GIF, BMP and others). The download has the same width and height as your original. Up to 50 boxes. Pixelate block size and blur radius each go from 2 to 120 pixels of the original image; the preview is drawn at up to 1,600 pixels on the long side, and the download is computed again at full size. Save a PNG, which keeps every pixel outside the boxes exactly as it was, or a JPG at 92% quality. There is no daily limit.
Is there a watermark?
No. Nothing is drawn on your image except your boxes. The only mark is the file name, which starts with ThumbCrafted- and can be renamed.

Continue crafting

Keep going: your result carries over to the next tool with no re-upload.

  1. 1EditAdd text, effects, or a fresh background
  2. 2EXIFCheck and strip hidden metadata