Chance.js vs Testing Files Generator: licensing, GitHub activity, and what each is actually for. Neutral comparison, no paid rankings.
Chance.js: Open source. 6,532 GitHub stars. Random generator helper for JavaScript. Generate random numbers, strings, names, addresses, and more.
Testing Files Generator: Open source. Generates real files at an exact byte size for testing upload forms, parsers and size limits — ask for a 10 MB PDF and get a PDF a reader opens, 10 MB to the byte, across 30 formats. Each run writes a manifest stating what your system should do with each file. CLI for CI plus a desktop GUI; runs offline, GPL-3.0.