SplatHash – A lightweight alternative to BlurHash and ThumbHash

In plain words

SplatHash is a lightweight image placeholder generator designed as a simpler and faster alternative to BlurHash and ThumbHash. It generates placeholder images that load quickly while a full image downloads, reducing the need for complex encoding and decoding processes. The tool targets developers building web and mobile applications who need efficient image loading solutions. Its primary advantage is reduced complexity and improved performance compared to existing placeholder generation methods.

written from the facts on this page · September 2026

From the sources

16 bytes fixed size image placeholder, an alternative to blurhash and thumbhash - junevm/splathash

SplatHash encodes any image into exactly 16 bytes (a 22-char base64url string) and decodes it back to a 32×32 blurry preview in 0.067 ms. Go, TypeScript, and Python all produce bit-for-bit identical hashes. Columns: original · SplatHash 32×32 · ThumbHash · BlurHash. Regenerate: mise run compare . Go is the reference implementation. All others are verified bit-for-bit against it. Go benchmarks on Intel Core i5-9300H ( go test -bench=. -benchmem ). Decode runs on every page load for every user. Encode runs once at upload. Optimize for decode. BenchmarkEncodeSplatHash-8 303 3530083 ns/op 100760 B/op 29 allocs/op BenchmarkEncodeThumbHash-8 1431 863553 ns/op 1015 B/op 6 allocs/op…from github.com

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