# HTTP

HTTP Developer Tools

Free browser-based http developer tools. 21 tools — no installs, no sign-ups, open and use instantly.

21 tools available
🌐
Content-Type Negotiator
Simulate HTTP content negotiation
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Cookie String Parser
Parse raw cookie header strings
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HAR File Analyzer
Analyze HAR network trace files
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Query Parameter Inspector
Inspect and edit query parameters
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Domain Extractor
Extract root domains and subdomains
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URL Canonicalizer
Normalize messy URLs
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Robots.txt Tester
Test robots.txt match rules
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CORS Header Validator
Check if cors headers are correctly configured
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🌐
HTTP Header Analyzer
Paste headers → detect misconfigs in one click
🔧
HTTP Mock Response Builder
Generate mock HTTP responses
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Set-Cookie Parser
Parse Set-Cookie headers
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ETag Generator
Generate ETag values from content
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Redirect Rule Builder
Generate redirect rules quickly
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Nginx Redirect Generator
Generate Nginx redirect config
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🌐
Apache Redirect Generator
Generate Apache redirect config
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Security Header Checker
Check common security headers
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Webhook Signature Verifier
Verify webhook signatures locally
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CIDR Range Expander
Expand small CIDR ranges
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🌐
IPv6 Compression / Expansion Tool
Compress and expand IPv6 addresses
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MIME Header Parser
Parse MIME and Content-Type headers
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Basic Auth Header Generator
Generate HTTP Basic Authorization headers