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HTTP Link Header Builder and Parser
Build or inspect inert HTTP Link fields with absolute HTTP(S) targets and a finite parameter subset.
HTTP Link field value, Target and rel/type/title builder fields
link-header.txt, link-header-report.json
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
This tool needs JavaScript. If it does not load, refresh the page and try again.
How to use this tool
- Choose Build or Parse, then supply the selected field values.
- Select Build or inspect Link and review the inert targets and parameters.
- Download link-header.txt and link-header-report.json.
Examples
Target https://example.com/page/2 and rel next produce <https://example.com/page/2>; rel="next".
Limitations
- At most 65536 ASCII field units, 100 links and 20 parameters per link; 4096 units per raw parameter, 8192 per target, 1024 per relation field and 2000 each for type/title. At most 1 MiB combined output and 30 seconds.
- Only absolute ASCII HTTP(S) targets without credentials, controls, whitespace or backslashes are admitted. URL normalization is explicit. Only rel, type and title parameters are supported; case-insensitive duplicate parameter names refuse. Relation token order and duplicates remain.
- Type and title are inert printable ASCII strings, not MIME validation. Relative targets, extended parameters, anchor semantics, active navigation, preload behavior and complete RFC 8288 coverage are outside this subset.
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