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)

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