API & Backend Tools
cURL converters, JWT decoders, cron helpers and HTTP utilities.
10 tools
cURL to Fetch ConverterPopularFeaturedPaste any cURL command and get clean JavaScript fetch() code — headers, body, auth and all.API & Backend ToolscURL to Axios ConverterTurn cURL commands into Axios request configs with headers, data, auth and error handling.API & Backend ToolscURL 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