Your files stay on your device

# ThumbHash encoder and decoder

Turn an image into a tiny placeholder code of about 25 bytes, and preview it back.

A 25-byte placeholder for any image

or click to browse from your device
Select Files

Supports: PNG, JPG, JPEG, WEBP, AVIF, GIF, BMP, TIFF
encodedecodeHow it worksThumbHash (MIT) hashes RGBA, alpha included. Into roughly 20-25 bytes. This tool box-filters the input to 100 px on the long edge first (the codec ceiling); the hash is the same for a 4000 px original and its 100 px sample.Clear

## More image tools

- [BlurHash](/images/blurhash)
- [LQIP placeholder](/images/placeholder)
[All image tools](/images)

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Canonical HTML: https://nutter.tools/images/thumbhash/
Markdown version: https://nutter.tools/images/thumbhash/index.md
Plain-text version: https://nutter.tools/images/thumbhash/index.txt
Agent index: https://nutter.tools/llms.txt