Developer Tools

16 tools available

A comprehensive collection of developer tools including JSON formatters, URL encoders, HTML entity handlers, UUID generators, JWT decoders, regex testers, URL parsers, and timestamp converters. Built for speed and privacy — all processing happens in your browser.

Available Tools

JSON Formatter & Validator

Format, validate, minify, and analyze JSON data with error detection and smart insights.

URL Encoder / Decoder

Encode and decode URLs with full UTF-8, Unicode support, batch processing, and validation.

HTML Encoder / Decoder

Encode and decode HTML entities with live preview, full Unicode support, and batch processing.

JWT Decoder

Decode and inspect JSON Web Tokens to view header, payload, and signature.

Regex Tester

Test and debug regular expressions with live matching.

URL Parser

Parse URLs into components: protocol, host, path, query, and fragment.

Unix Timestamp Converter

Convert between Unix timestamps, ISO 8601 dates, and human-readable date formats.

Cron Expression Generator & Parser

Build, parse, validate, and test cron expressions with live previews, calendar view, and 42 presets.

Webhook Tester & Request Inspector

Simulate, inspect, validate, and compare webhook requests with 22 real-world presets, body viewer, and export to HAR/cURL.

GraphQL Playground

Write, test, validate, and execute GraphQL queries with schema exploration, variables editor, and export capabilities.

HTTP Headers Analyzer

Analyze, parse, and audit HTTP headers for security, performance, and best practices with detailed explanations.

HTTP Status Code Reference

Complete reference for every HTTP status code with examples, framework code, SEO impact, security guidance, and real-world scenarios.

User-Agent Parser

Parse, analyze, compare, and validate User-Agent strings. Detect browsers, OS, devices, bots, security issues, and check compatibility — all in your browser.

MIME Type Lookup

Search, identify, validate and explore MIME types, file extensions and Content-Type headers

Curl Command Builder

Build, validate, and convert HTTP requests to cURL commands and code snippets in 13+ languages

REST API Request Builder

Build, validate, and export REST API requests visually with code generation for 20+ languages.