Tech Stack Detector
Inspect public markup and response-header signatures for technology clues. Include matched evidence and label the inference heuristic. Hidden stacks and removed signatures remain undetected.
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Raw data
The server requests the public URL you provide. Provider tools send the requested URL or question to the named data service. Do not submit secrets.
Method & interpretation
Inspect public markup and response-header signatures for technology clues. Include matched evidence and label the inference heuristic. Hidden stacks and removed signatures remain undetected.
Read the method, limits and verification steps below before changing a production site.
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JSON Formatter
Parse strict JSON and produce formatted and minified output. Reject numeric values outside safe integer precision. Use strings for exact long identifiers and verify values after formatting.
Input processingURL inspector
Parse a public URL without visiting the destination. Preserve repeated query parameters and the fragment in the output. Parsing alone does not establish safety or availability.
Input processingHeading outline
Extract h1 through h6 from pasted source and flag downward level skips. Review the structure in context; it is not a search ranking rule or complete accessibility audit.
Input processing