Test files that tell you what they break.

A deterministic corpus for QA and test engineers — stable URLs, published SHA-256 digests, and a note on the exact bug each file is built to catch. Nothing tracked, nothing to sign up for.

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Generate on demand

Files above a few hundred megabytes are never stored — a Worker streams them, so any size is available for free. The generator also covers HTTP behaviour a static file can't.

Response behaviour

/slow?size=10mb&bps=50000Throttled download, for timeout testing
/truncate?size=10mbDeclares a length, then closes at half
/no-content-length?size=5mbChunked, no Content-Length header
/delay?ms=5000Stalls before the first byte
/status/503Any HTTP status code
/redirect/5An N-hop redirect chain

Request inspection & auth httpbin-style

/anythingEchoes your method, headers, query & body
/headersThe request headers you sent
/ipYour IP address
/uuidA random UUIDv4
/basic-auth/user/pass401 unless correct Basic auth is sent
/cors?origin=echoConfigurable CORS headers & preflight

Full list at /endpoints — everything is stateless and free.