Resumable.js Review

Resumable.js splits each file into smaller chunks, this way if the upload of a chunk fails, uploading is retried until the procedure completes. This allows uploads to continue even after a network failure either locally or to the server. It also allows users to pause, resume and even recover uploads without even losing state.

The backend can be found in many languages and for many frameworks.

Resumable is completely free and distributed under the MIT license.