HttpFixer → About

About HttpFixer

HttpFixer is a free, browser-based suite of HTTP developer tools built by MetricLogic. Each tool fetches live data from your URL, detects your stack, and outputs stack-specific configuration — rather than generic recommendations.

15+Active tools

5Generators

0Signups required

MITOpen source

How it works

Each tool follows the same pattern: fetch live data from your URL, read the response headers to identify your stack (Nginx, Cloudflare, Vercel, Express, and others), then output configuration specific to that stack. The output is always meant to be a starting point — always test in a staging environment before deploying to production.

Processing happens entirely in your browser. Your URLs, headers, and configs are not sent to any server beyond the target you specify.

Principles

Stack-specific output — configuration is generated based on your detected stack, not generic templates.

Client-side only — your URLs, configs, and data are not stored or logged.

No signup, no backend, no tracking.

Live data — tools fetch real responses from your URL rather than relying on cached or estimated data.

MIT licensed, open source — all code public at github.com/metriclogic26/httpfixer.

The tools

Tool	What it does
HeadersFixer	Scans HTTP security headers and generates stack-specific config for missing or misconfigured headers
CORSFixer	Sends a live OPTIONS preflight to your API and generates middleware fixes for common CORS errors
OAuthFixer	Diagnoses OAuth 2.0 / OIDC errors and generates provider-specific fixes for Auth0, Okta, Cognito, and others
CSPFixer	Scans your live page resources and generates a working Content Security Policy
EdgeFix	Audits Cache-Control and CDN caching headers and identifies misconfigurations
SpeedFixer	Fetches live PageSpeed audit results and generates stack-specific performance config
Header Diff	Compares HTTP headers between two URLs side by side
Cache Simulator	Visualises Cache-Control directive behaviour including stale-while-revalidate windows
HSTS Preload Checker	Checks preload list status and HSTS header requirements
JWT Debugger	Decodes and validates JSON Web Tokens — flags expired tokens, weak algorithms, and missing claims
CSP Validator	Validates a CSP string against W3C spec — flags unsafe-inline, missing directives, and syntax errors
Security Headers Scorer	Scores your security headers 0-100 with per-header breakdown and fix links
Mixed Content Fixer	Finds HTTP resources on your HTTPS page and generates the upgrade config
Redirect Chain Fixer	Follows redirect hops in real time and identifies loops
Pre-Launch Checklist	20 HTTP checks before shipping — security, CORS, cache, redirects, and staging verification

Part of MetricLogic

HttpFixer is part of the MetricLogic network of free developer diagnostic tools:

ConfigClarity.dev — Server & DevOps audit tools (cron, SSL, Docker, firewall)
DomainPreflight.dev — Domain & email authentication (DNS, DMARC, WHOIS)
HttpFixer.dev — HTTP headers, CORS, CSP, OAuth (you are here)

Open source

All HttpFixer code is MIT licensed and public at github.com/metriclogic26/httpfixer.

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