Tool directory
All developer tools
Search the complete browser-based collection. Every tool is free, works without an account, and is designed for quick technical work.
31 tools
JSON Formatter
Format, validate, and inspect JSON with clear syntax errors.
JSON Validator
Check JSON syntax and pinpoint the exact parser error.
JSON Minifier
Remove insignificant whitespace from valid JSON.
JSON to CSV
Convert an array of JSON objects into spreadsheet-ready CSV.
CSV to JSON
Convert CSV rows into a structured JSON array.
JSON Diff
Compare two JSON documents after structural normalization.
JSON to TypeScript
Infer a practical TypeScript interface from a JSON value.
JSON to YAML
Convert valid JSON into readable YAML.
YAML to JSON
Parse YAML and convert it to formatted JSON.
Base64 Encoder
Encode Unicode text as Base64 in your browser.
Base64 Decoder
Decode Base64 into readable UTF-8 text.
URL Encoder
Percent-encode text for safe use in URL components.
URL Decoder
Decode percent-encoded URL components into readable text.
JWT Decoder
Inspect JWT headers and payloads without sending the token anywhere.
UUID Generator
Generate cryptographically random UUID v4 identifiers.
Password Generator
Generate strong random passwords locally with browser cryptography.
Hash Generator
Create SHA-256 hashes with the browser Web Crypto API.
Regex Tester
Test JavaScript regular expressions and inspect every match.
Text Diff
Compare two text blocks line by line.
Timestamp Converter
Convert Unix timestamps to readable UTC and local dates.
Cron Generator
Build common five-field cron schedules and read the result.
Base Converter
Convert integers between binary, octal, decimal, and hexadecimal.
HTML Encoder
Encode special HTML characters or decode common entities.
Color Converter
Convert HEX colors to RGB and HSL values.
Slug Generator
Create clean URL slugs from titles and phrases.
Markdown Preview
Write Markdown and preview the rendered document safely.
HTML Formatter
Indent HTML markup for easier reading and review.
CSS Formatter
Format readable CSS or minify it for compact output.
JavaScript Formatter
Apply readable indentation to JavaScript snippets.
HTTP Status Codes
Look up common HTTP status codes by number or meaning.
User-Agent Parser
Parse a user-agent string into browser, engine, OS, and device details.