Inspect, Test &
Debug Web APIsInstantly.
Direct-browser HTTP debugging and protocol inspection. Test REST endpoints without third-party proxies, decode sensitive JWT bearer tokens client-side, convert cURL commands to modern codebases, and dissect URLs entirely in your browser.
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{
"sub": "usr_9981_prod",
"role": "api_admin",
"exp": 1774051200 // 2026-03-21,
"iss": "https://auth.codekivo.com"
}
Specialized HTTP & API Utilities
Clean, privacy-first developer utilities for HTTP dispatching, token decoding, syntax translation, and status code lookups.
Decode, inspect, and verify JSON Web Tokens client-side. Audit claims, expiration dates, and payload structure with zero server exposure.
Transform raw cURL command line snippets into idiomatic JavaScript Fetch, Axios, Python Requests, Go, Java, and C#.
Searchable directory of all standard HTTP response codes. Detailed causes, browser caching behavior, and common troubleshooting steps.
Deconstruct complex URLs into protocol, host, port, path, and search parameters. Edit query strings in an interactive table.
Modern API Development & Debugging Flow
A complete in-browser workflow to inspect credentials, verify HTTP endpoints, and export production-ready client code.
JWT Inspection & Claims
Safely inspect claims, audience targets, and expiration timestamps inside signed JWT bearer tokens without leaking production secrets over the network via the JWT Decoder.
HTTP Semantics & Error Remediation
Troubleshoot unexpected HTTP status codes, diagnose authentication rejections (401 vs 403), and inspect browser caching behavior with the HTTP Status Codes reference guide.
Polyglot Codegen & URL Assembly
Transform command-line snippets into maintainable client code with the cURL Converter and construct percent-encoded query parameter strings using the URL Parser & Builder.
HTTP & API Capability Matrix
Detailed technical capabilities, standards compliance, and performance guarantees across our API tooling suite.
| Technical Feature | JWT Decoder | cURL Converter | Status Codes | URL Parser |
|---|---|---|---|---|
| Target Specifications & Standards | RFC 7519 / OIDC (JWT & JWS) | RFC 9110 / Polyglot Codegen | RFC 9110 HTTP & RFC 6585 Specs | RFC 3986 & WHATWG URI Standard |
| Execution & Runtime Environment | 100% In-Browser Web Crypto API | Client-Side Shell Tokenizer & Parser | Static In-Memory Search Engine | Native URL & URLSearchParams Engine |
| Payload & Data Type Support | Header, Claims, Signature & Dates | Headers, Cookies, JSON, Form-Data | 1xx, 2xx, 3xx, 4xx, 5xx Status Sets | Origin, Paths, Query Params & Hashes |
| Export & Transformation Capabilities | Decoded JSON & Epoch Expiry Dates | Fetch, Axios, Python, Go, PHP, Java, C# | Diagnostic Causes & Remediation Tips | Clean Serialized URLs & Parameter Tables |
| Data Privacy & Security Guarantee | 100% In-Browser (Zero Server Egress) | 100% In-Browser (Zero Server Egress) | 100% In-Browser (Zero Server Egress) | 100% In-Browser (Zero Server Egress) |
| Engine Performance & Speed | Sub-1ms Instant Token Dissection | Sub-2ms Multi-Target Codegen | Instant Real-Time Search Filtering | Sub-1ms Reactive URL Serialization |
Related Developer Toolkits
Essential companion tool suites for API response formatting, payload encoding, and cryptographic tokens.
100% Client-Side & Zero Network Egress Guarantee
Offline VerifiedAll HTTP & API tools—including JWT inspection, cURL code generation, URL parameter parsing, and HTTP status code lookups—execute 100% locally within your browser's memory. No outbound network requests are dispatched, no authentication credentials or tokens ever leave your machine, and zero intermediary proxy servers are involved.