Large Test Files: 1 MB to 100 GB

Big dummy files from public speed-test servers, plus exact-size files to the byte.

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Help shape Large Test Files: 1 MB to 100 GB

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Frequently Asked Questions

From public speed-test servers run by Tele2, OVHcloud and Hetzner, which exist for exactly this purpose.

Yes, up to 99,999,999 bytes, using Make your own. Larger sizes use the fixed 100 MB to 100 GB files.

No. Large files are downloaded directly by the browser, not loaded into the page.

Copy the curl command and add -o /dev/null to measure speed without saving the file.

Large Test Files — 1 MB to 100 GB Downloads - Privacy-First, Offline Developer Tool

Global Architecture: This tool runs entirely in your browser using WebAssembly. Unlike server-side alternatives, your data (JWTs, Logs, SQL) never leaves this device. It works offline and handles massive files (1GB+) bounded only by your RAM.