// all tools
The whole toolbox, one tab.
36 developer utilities grouped by what they do — formatting, encoding, code, and web. All free, all private, nothing to install.
No upload, ever No account needed Works offline
// formatters
Formatters & Converters
JSON Formatter & Validator Most Popular Format, validate, minify and view JSON data in a beautiful tree view. XML Formatter & Validator Format, beautify and validate XML documents with clear error reporting. CSV to JSON Converter Convert CSV data into clean, structured JSON in one click. JSON to CSV Converter Convert JSON arrays into CSV ready for spreadsheets and export. YAML to JSON Converter Convert YAML configuration into valid JSON instantly. JSON to YAML Converter Convert JSON data into clean, readable YAML instantly. JSON to XML Converter Convert JSON data into clean, indented XML instantly. XML to JSON Converter Convert XML documents into structured JSON instantly. JSON to TypeScript Generate TypeScript interfaces from any JSON sample. JSON to Python Generate Python dataclasses from any JSON sample. JSON to C# Generate C# classes from any JSON sample. JSON to Go Generate Go structs with json tags from any JSON sample. JSON to Rust Generate Rust serde structs from any JSON sample. JSON to Kotlin Generate Kotlin data classes from any JSON sample. JSON to Java Generate Java records from any JSON sample. TOML to JSON Converter Convert TOML to JSON and JSON back to TOML, both ways. .env to JSON Converter Convert .env files to JSON and JSON back to .env, both ways. Query String to JSON Converter Convert URL query strings to JSON and JSON back to a query string. JSON Diff Compare two JSON documents and see exactly what changed. JSONPath Tester Run a JSONPath expression against JSON and see the matches. Markdown Previewer Write Markdown and see a live rendered preview, then copy the HTML.
// encoding
Encoding, Hashing & Security
Password Generator Generate strong, random passwords with a strength estimate. Base64 Encode / Decode Hot Encode and decode Base64 for text and images, right in your browser. URL Encode / Decode Percent-encode and decode URLs and query string components safely. JWT Decoder Hot Decode JWT header, payload and signature — entirely client-side. Hash Generator Popular Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text. UUID / GUID Generator Generate random v4 UUIDs singly or in bulk, ready to copy.
Unix Timestamp Converter Convert Unix timestamps to human dates and back, with a live clock. Cron Expression Parser Explain a cron expression in plain English and see its next runs. Regex Tester Popular Test and debug regular expressions with live match highlighting. CSS Minifier & Beautifier Minify CSS to shrink it, or beautify it for readable formatting. HTML Minifier & Beautifier Minify HTML to reduce size, or beautify it for clean formatting. Color Converter Pick and convert colors between HEX, RGB, HSL and CMYK.
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