Extreme compression to 3KB for tiny thumbnails
A 3KB budget is signature-and-thumbnail territory, not photograph territory. The tool re-encodes your image on a canvas and, because quality alone cannot get there, also reduces the dimensions — a photo typically lands near 170x130 pixels. Expect visible softening on text and fine detail. Everything happens on your device; the file is never sent anywhere.
A browser-based compressor that re-encodes an image until it falls under 3KB, a budget that holds roughly 170x130 pixels of photographic detail.
Related terms
At 3KB there is room for roughly 22k pixels of photographic detail, so the image must shrink to around 170x130. A signature or logo survives this well; a group photo does not.
3KB is about 1365x smaller than a typical 4MB phone photo. Something has to go, and the encoder sacrifices fine texture first.
PNG is lossless and cannot approach this size for photographic content. It only makes sense for flat graphics with few colours.
Compression runs on your own device using the Canvas API. There is no upload step and no server involved.
Compress Image to 3KB targets one of the smallest budgets a form ever asks for. At this size a photograph cannot keep its resolution, so the tool trades pixels as well as quality, typically landing near 170x130.
The image is decoded, drawn to an offscreen canvas and re-encoded. Quality is stepped down and measured against the 3KB ceiling on each pass; dimensions are reduced as well, because quality alone cannot reach this target on photographic content.
Scanned signatures, tiny avatars and legacy systems with per-field caps measured in single kilobytes. Anything with large flat areas reaches 3KB far better than a photograph does.
Reaching 3KB means discarding roughly 1365x the data in a typical 4MB phone photograph, and nothing restores it. At this budget text within an image becomes hard to read and fine texture disappears; compress from the highest-quality original you have, never from an already-compressed copy.
The image is decoded and re-encoded by your own browser using the Canvas API. There is no upload endpoint, so the file cannot reach a server; closing the tab discards everything.
