Debug your data.
Faster.
Developer tools that just work. Format JSON, decode JWTs, test APIs, analyze logs — all in one place. Clean, fast, and privacy-first.
Developer Tools
JSON Debugger
Format, validate, and analyze JSON with intelligent error detection
JWT Analyzer
Decode and verify JWT tokens with security analysis
Regex Tester
Test regex patterns with real-time highlighting and code generation
Code Formatter
Beautify & minify code in 20+ languages with syntax highlighting
Timestamp Converter
Convert Unix timestamps, dates, and timezones instantly
Encoder/Decoder
Base64, URL, Hex, Binary, HTML entities — auto-detect & magic mode
Data Inspector
Paste anything — auto-detect JSON, JWT, Base64, timestamps and more
Log Analyzer
Filter and analyze logs with intelligent pattern detection
Crypto & Security
Hash files, generate UUIDs, and create secure passwords — 100% client-side
API Tester
Test APIs with code generation, environments, and history
HTTP Headers
Analyze security headers, CORS, and generate server configs
WebSocket/SSE
Debug WebSocket and Server-Sent Events in real-time
GraphQL
GraphQL playground with schema explorer and auto-complete
Code Converter
Convert between cURL, SQL, YAML, .env and more
Text & Numbers
Case convert, sort, diff, find/replace, CSV format, and more
Mock Data
Generate realistic test data with custom schemas
Cron Builder
Build cron expressions visually with human-readable descriptions
Markdown Editor
Write Markdown with live preview, toolbar, and HTML export
PDF Tools
View, merge, split, rotate, watermark, and edit PDFs
Image Tools
Resize, crop, compress, convert, and watermark images
Color Picker
Pick colors, convert formats, and generate palettes
Invoice Generator
Create professional invoices with PDF export
Quotation Generator
Create professional quotations and price proposals with PDF export
Tax Invoice
Generate Thai tax invoices (ใบกำกับภาษี) with VAT and withholding tax
Receipt Generator
Create professional payment receipts with PDF export
See it in action
Formatted JSON
{
"user": "dev",
"status": "active"
}Decoded Payload
{
"sub": "1234567890",
"name": "Developer",
"iat": 1516239022
}