HTTP Accept Header Tester

Accept header value text/*;q=0.3, text/plain;q=0.7, text/plain;format=flowed, text/plain;format=fixed;q=0.4, */*;q=0.5

Comma-separated media ranges. An optional “Accept:” prefix is accepted; q defaults to 1.

Offered media types text/plain;format=flowed text/plain text/html image/jpeg text/plain;format=fixed text/html;level=3

One concrete type per line, with optional media parameters. Leave blank to parse the header without testing offers.

Test Accept header Reset example

Choose Test Accept header to evaluate the RFC 9110 example.

The most specific matching media range determines each offer’s quality; q=0 means not acceptable. Highest-quality ties keep the offer order shown here. A server may apply other dimensions or ignore Accept when no offer matches. All parsing stays in your browser.