# satazor/js-spark-md5

Lightning fast normal and incremental md5 for javascript

Repository: https://github.com/satazor/js-spark-md5
Canonical: https://ross.abutalabs.com/products/js-spark-md5
Language: JavaScript
License: WTFPL
License Family: permissive
Last push: 2023-11-14T03:33:40+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5343, "days_push": 1023, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2606, forks 459 (observed 2026-08-28T04:07:04.041700+00:00)

## What it is
SparkMD5 is a fast JavaScript implementation of the MD5 hash algorithm, supporting both one-shot and incremental hashing. It works in browsers and Node.js, supports ArrayBuffer/typed arrays, and enables low-memory hashing of large files by appending chunks.

## Use cases
- compute md5 hash of a string in the browser
- hash large files in chunks without loading them fully into memory
- incrementally build an md5 hash from streamed data
- hash ArrayBuffer or typed array data
- compute file checksums client-side before upload

## When to choose
- you need fast md5 hashing in the browser
- you need incremental/chunked hashing of large files with low memory usage
- you need a library usable in both Node.js and browsers

## When to avoid
- you need a cryptographically secure hash (md5 is broken for security purposes)
- you are in Node.js only and the built-in crypto module suffices
- you need modern algorithms like SHA-256

## Facets
- artifact type: library
- maturity: maintenance
- function: cryptography, serialization
- domain: developer-tools, web-development, files
- platform: browser
- tags: md5, hashing, incremental-hashing, file-hashing, utf8, nodejs, javascript

## Member repositories
- satazor/js-spark-md5 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:04.041700+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:21:00.897686+00:00, confidence not recorded.
  - readme: https://github.com/satazor/js-spark-md5 (fetched 2026-08-28T04:07:04.041700+00:00, sha 62645bad0ce8)
- Data as of 2026-08-30T08:39:29.467469+00:00.