Developer Tools
Tools for developers and programmers
Our Developer Tools collection includes 13 utilities built for programming workflows. Use the JSON Formatter to validate and pretty-print API responses, the JWT Decoder to inspect authentication tokens without writing code, and the Regex Tester to build and debug regular expressions with live matching feedback. The SQL Formatter beautifies queries for readability, while the Base64 Encoder/Decoder and URL Encoder/Decoder handle data encoding tasks for API integrations. Generate hash digests with the Hash Generator (MD5, SHA-1, SHA-256, SHA-512), switch between HEX, RGB, and HSL color formats with the Color Converter, and shrink CSS, JavaScript, or HTML with the Code Minifier. The Diff Checker highlights differences between two text snippets line by line, the XML Formatter tidies data exchange files, and the UUID Generator creates unique identifiers for database records and prototypes. The Cron Expression Generator builds cron schedules from plain English or visual selectors with run-time preview. All of these tools process your data entirely in your browser — nothing is sent to a server.
Found 13 tools in Developer Tools
JSON Formatter
Use our JSON formatter online to instantly format, validate, and beautify any JSON data. Paste minified JSON and get perfectly indented output with syntax error detection.
JWT Decoder
Use our JWT decoder online to instantly decode any JWT token. Inspect headers, payloads, and claims safely in your browser with this free JWT token decoder.
Regex Tester
Use our regex tester online to test, debug, and validate regular expressions with live matching. This free regular expression tester helps you build perfect patterns instantly.
SQL Formatter
Use our SQL formatter online to instantly beautify and format any SQL query. This free SQL formatter supports MySQL, PostgreSQL, and more with clean indentation.
Base64 Encoder/Decoder
Use our Base64 decode online tool to instantly decode any Base64 string or encode text to Base64. This free Base64 encoder decoder handles all your conversion needs.
URL Encoder/Decoder
Use our URL encode online tool to instantly encode special characters for safe URLs and query parameters. This free URL encoding tool also decodes percent-encoded strings.
Hash Generator
Use our MD5 hash generator online to instantly create SHA256, SHA1, SHA512, and MD5 hashes. This free hash generator is browser-based and works offline.
Color Converter
Use our HEX to RGB converter online to instantly convert between HEX, RGB, and HSL color codes. This free color code converter is perfect for web designers.
Code Minifier
Use our JavaScript minifier online to instantly minify JS, CSS, and HTML code. This free JS minifier reduces file sizes and speeds up your website.
Diff Checker
Use our diff checker online to instantly compare two texts and find differences. This free text diff tool highlights additions, deletions, and changes side by side.
XML Formatter
Use our XML formatter online to instantly format, beautify, and validate any XML document. This free XML validator catches syntax errors and pretty prints your data.
UUID Generator
Use our UUID generator online to instantly generate random UUID v4 and v1 identifiers. This free GUID generator creates unique IDs for databases and development.
Cron Expression Generator
Use our free cron expression generator to instantly build any cron schedule. Generate cron expressions from plain English, visual selectors, or paste to translate. Standard and Quartz format support.