Pixelate & Mosaic
Applies a mosaic or blur over selected regions of an image and flattens it into the output.
Most “redaction” in an image editor is a black rectangle drawn on a layer above the picture, and the picture is still underneath. This rewrites the pixel buffer and encodes the file from that, so there is nothing beneath the mosaic — and it is honest about which of its three modes actually achieve that.
Drop a screenshot or photo
Nothing is uploaded. The redaction happens in this tab and the file is rebuilt from the redacted pixels.
How to use it
Drag over what has to go
Each drag adds a region; the list beside the image lets you remove one you got wrong.
Use solid fill over text
Pixelated text has been recovered by brute-forcing the rendering — try every candidate string, pixelate it the same way, compare. A flat rectangle has nothing to brute-force.
Make the block big enough
The block has to be a decent fraction of the thing being hidden, not of the photo. Eight blocks across a face is still a recognisable face.
Common questions
Is blur good enough?
No. Blur is a reversible linear operation, and small text has been read back out of blurred screenshots. It is offered here for the cases where you want something to look softened, not for hiding anything.
Does the metadata go too?
Yes, and that matters more than it sounds: a JPEG carries a thumbnail of itself in its EXIF, that thumbnail is not updated when the image is edited, and it is how a redacted photo hands the original straight back. Decoding and re-encoding leaves no metadata to carry one.
Can I undo a redaction later?
Not from the exported file — that is the point. Keep the original somewhere separate if you need it; the output is a one-way result.
Feed it from
Screenshot Annotator
Draws arrows, boxes, numbered steps and blur patches on a screenshot and exports a flat image.
Face Blur
Proposes face boxes from a skin-colour heuristic — no model, so it also finds hands and misses shaded faces — for you to confirm or draw over, then mosaics them by rewriting the pixels.
Image to ASCII
Converts a picture into ASCII or ANSI-coloured characters at a chosen width and character set.
Block Character Art
Converts an image into half blocks, quadrants or sextants with an ANSI truecolor foreground and background in every cell, and exports ANSI, HTML, SVG and PNG.
Next
These accept what this tool produces, so the result can go straight in.
EXIF Remover
Strips camera, GPS and editing metadata from photos while leaving the pixels untouched.
Face Blur
Proposes face boxes from a skin-colour heuristic — no model, so it also finds hands and misses shaded faces — for you to confirm or draw over, then mosaics them by rewriting the pixels.
PNG Compressor
Quantises the palette and rewrites the deflate stream to shrink a PNG without changing its dimensions.
Screenshot Annotator
Draws arrows, boxes, numbered steps and blur patches on a screenshot and exports a flat image.
Background Remover
Keys out a flat or single-colour background in OKLab and returns a transparent PNG, with a brush for fixing the edges.
Favicon Generator
Produces the whole favicon set — ICO, PNGs, Apple touch icon, web manifest — plus the HTML to paste.