SEO

robots.txt Validator

Check robots.txt — User-agent group structure, directives, and a path tester for allow/block decisions.

If you enter just a domain, /robots.txt is appended. This won't work for every site — some block cross-origin requests (CORS); if fetching fails, open robots.txt in a new tab and paste the contents manually.

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Encode and decode JWT tokens — header, payload, HMAC signing, and standard claims.

Email Header Analyzer

Parse raw email headers (View Source / Show Original) — key fields, the Received chain with hop timings, SPF/DKIM/DMARC, From/Reply-To spoofing indicators.