# TTLabs/EvaporateJS

Javascript library for browser to S3 multipart resumable uploads

Repository: https://github.com/TTLabs/EvaporateJS
Canonical: https://ross.abutalabs.com/products/evaporatejs
Language: JavaScript
License Family: other
Last push: 2024-01-12T02:57:24+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": 5004, "days_push": 964, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1825, forks 205 (observed 2026-08-28T04:05:41.264135+00:00)

## What it is
EvaporateJS is a JavaScript library for uploading files directly from the browser to AWS S3 using parallel multipart uploads. It supports MD5 checksums, pause/resume of uploads, and resilient recovery of interrupted transfers.

## Use cases
- upload large files from the browser to S3
- resumable file uploads that survive network interruptions
- parallel multipart uploads to AWS S3
- verify uploaded parts with MD5 checksums
- pause and resume uploads in a web app
- upload files to S3 with Transfer Acceleration

## When to choose
- you need browser-to-S3 uploads without a backend proxy
- you upload large files that may be interrupted and need resumability
- you want parallel multipart uploads with progress monitoring

## When to avoid
- you upload to storage providers other than AWS S3
- you need a maintained solution with an active release cadence and clear license
- you need server-side uploads rather than browser-based ones

## Facets
- artifact type: library
- maturity: maintenance
- function: file-upload, http-client
- domain: web-development, frontend, cloud-computing
- platform: browser
- tags: aws-s3, multipart-upload, resumable-upload, browser, javascript

## Member repositories
- TTLabs/EvaporateJS (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:41.264135+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 2026-08-30T03:19:40.723780+00:00, confidence not recorded.
  - readme: https://github.com/TTLabs/EvaporateJS (fetched 2026-08-28T04:05:41.264135+00:00, sha f5308570fe7b)
- Data as of 2026-08-30T08:39:29.467469+00:00.