Developer Utilities
Fast, free, open source, ad-free tools.
Everything runs in your browser — no data sent to servers.
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- JSON Formatter & Validator Format, validate, beautify, and fix JSON instantly. Supports RFC 8259, auto-fixes common errors, tree view, JSONPath, and more.
- JSON to TypeScript Converter Generate TypeScript interfaces and types from any JSON object in one click. Handles nested objects and arrays.
- CSV to JSON Converter Convert CSV data to a JSON array instantly. Handles headers, quoted fields, and special characters.
- JSON to CSV Converter Transform a JSON array into a CSV file quickly. Flattens nested objects and handles all value types.
- Base64 Encoder / Decoder Encode plain text to Base64 or decode Base64 back to text. Full UTF-8 support for all languages.
- Regex Tester Test JavaScript regular expressions with live match highlighting. Supports all flags: g, i, m, s, u, y.
- JSON Diff Checker Compare two JSON payloads side by side. Highlights added, removed, changed, and type-changed values.
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Coming soon
XML Formatter
YAML to JSON
JSON to YAML
JWT Decoder
URL Encoder/Decoder
HTML Formatter
CSS Formatter
JavaScript Formatter
SQL Formatter
Hash Generator
UUID Generator
Timestamp Converter
Markdown Previewer
HTML Entities Encoder
Text Diff Checker
QR Code Generator
Color Converter
Cron Expression Tester
Lorem Ipsum Generator