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50 tools
cURL to PHP GuzzleConvert cURL commands into PHP Guzzle client code — json, form_params, multipart and auth options included.API & Backend ToolsHTTP Header ParserPaste raw HTTP headers and get each one parsed, validated and explained in plain English.API & Backend ToolsJWT Expiry CheckerPopularInstantly see if a JWT is expired — with exact expiry time in your timezone, UTC, and remaining lifetime.API & Backend ToolsJWT Claims DecoderPopularFeaturedDecode a JWT's header and payload with every registered claim explained — locally, nothing uploaded.API & Backend ToolsCron Expression HumanizerPopularType any cron expression and read what it means in plain English — instantly, as you type.API & Backend ToolsCron Next Run CalculatorSee exactly when a cron expression will fire next — the next 5, 10 or 20 runs in your local time.API & Backend ToolsCORS Header GeneratorFeaturedGenerate correct CORS headers for Apache, Nginx, PHP or Express — with credential-mode validation built in.API & Backend ToolsCSP Header GeneratorBuild a Content-Security-Policy header directive by directive — output for raw header, .htaccess, Nginx, meta tag or PHP.API & Backend Tools.htaccess Redirect GeneratorPopularGenerate correct 301/302 redirect rules for Apache — Redirect directives or RewriteRules, plus HTTPS and www blocks.Web, Server & Code ToolsCHMOD CalculatorPopularFeaturedClick permission checkboxes and get the octal chmod value — or type an octal and see the permissions, live both ways.Web, Server & Code ToolsUnix Permission ConverterConvert between symbolic (rwxr-xr-x) and octal (755) permission notation — with a full per-audience breakdown.Web, Server & Code ToolsCIDR Range CalculatorPopularEnter any IPv4 CIDR block and get network, broadcast, usable host range, and address counts instantly.Web, Server & Code Tools