Build clean Accept-Encoding headers, tune q-values, simulate how a server will choose between Brotli, gzip, zstd, identity, and wildcard fallbacks, and copy deployment snippets without hunting through RFC notes.
Choose the encodings your client advertises. Lower q-values mean lower preference. A q-value of 0 explicitly rejects that encoding.
Simulate a server choosing an encoding based on your advertised preferences, the server's available codecs, and whether compression is worthwhile for the response size.
Quick directional guidance. Actual support depends on the client, transport stack, and server implementation.
Rule of thumb: Brotli usually wins for web text assets, gzip remains the broad compatibility baseline, zstd is promising but not universal in browser request headers yet, and identity is the no-compression fallback.