# tus/tus-js-client

A pure JavaScript client for the tus resumable upload protocol

Repository: https://github.com/tus/tus-js-client
Canonical: https://ross.abutalabs.com/products/tus-js-client
Homepage: https://tus.io/
Language: JavaScript
License: MIT
License Family: permissive
Topics: tus, web, browser, reactnative, cordova, nodejs
Last push: 2026-08-11T16:49:27+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 97, release rhythm 40, longevity 100
- inputs: {"age_days": 4167, "days_push": 22, "days_rel": 594, "gap_med": 1, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2618, forks 339 (observed 2026-08-28T04:07:04.705279+00:00)

## What it is
tus-js-client is a pure JavaScript client library for the tus resumable upload protocol, an HTTP-based protocol for interruptible, resumable file uploads. It runs in browsers, Node.js, React Native, and Apache Cordova, handling retries, progress reporting, and resuming interrupted uploads.

## Use cases
- upload large files reliably from the browser
- resume interrupted file uploads after network failures
- add pause and resume to a file uploader
- upload files from a React Native or Cordova app
- show upload progress with retry on flaky mobile networks
- implement a client for a tus-compatible upload server

## When to choose
- your server (or a service like Vimeo) speaks the tus protocol
- users upload large files over unreliable networks and you need resumability
- you need one uploader that works across browser, Node.js, and mobile environments

## When to avoid
- your backend only accepts plain multipart/form-data uploads and you cannot deploy a tus server
- you only upload tiny files where resumability adds no value
- you need a full upload UI widget rather than a protocol client library

## Facets
- artifact type: library
- maturity: stable
- function: file-upload, http-client
- domain: web-development, files, apis
- platform: browser, cross-platform
- tags: resumable-uploads, tus-protocol, javascript, react-native, cordova, file-transfer, nodejs, web-server

## Member repositories
- tus/tus-js-client (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:04.705279+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 2026-08-30T02:20:23.289852+00:00, confidence not recorded.
  - readme: https://github.com/tus/tus-js-client (fetched 2026-08-28T04:07:04.705279+00:00, sha cc8aa5135a16)
  - homepage: https://tus.io/ (fetched 2026-08-29T10:03:33.407006+00:00, sha 61b6c0458b1b)
  - registry_npm: https://registry.npmjs.org/tus-js-client (fetched 2026-08-29T10:03:33.411631+00:00, sha 9db59b12e602)
  - site_page: https://tus.io/faq (fetched 2026-08-29T10:03:33.409579+00:00, sha 11a1bb9f2257)
- Data as of 2026-08-30T08:39:29.467469+00:00.