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HTTP Structured Field Inspector
Parse and serialize supported RFC9651 HTTP structured-field declarations.
Structured field value, Field structure
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
- Enter the displayed example values,or choose the local input files requested by the controls. Optional source files take precedence where labelled.
- Choose Inspect field and inspect the complete result and any reported limitations.
- Use Download result and each companion download link to save complete outputs. Reset clears output and restores example controls.
Examples
Structured field value: priority=3, enabled, labels=("alpha" "beta");version=1
Field structure: dictionary
Limitations
- Parse a field value as an RFC9651 item,list or dictionary,including dates and UTF-8 display strings. Download its complete typed tree and canonical serialization. Numeric values remain exact decimal strings. Duplicate dictionary keys and parameters keep their last value at the first position. This checks generic syntax;the application defines which kind and values a particular header permits. ASCII source only,no field name or CR/LF. Up to100,000 characters,2,000 top-level members and20,000 cumulative item/parameter values;complete report4 MiB. All processing stays in your browser.
- Complete outputs only. Unsupported or oversized input is refused. Follow the displayed job-specific bounds and format policies.
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