Developer Tools Tools & Free Online Utilities

Validate and format JSON, test regular expressions, generate UUIDs, decode JWT tokens, beautify SQL, and minify CSS/JS online. 100% private in-browser execution.

Format, validate, test, encode, and debug code elements.

• JSON Formatter - Format, beautify, and auto-indent complex JSON documents for human legibility.
• JSON Validator - Validate JSON syntax structures with detailed error tracking and formatting assistance.
• XML Formatter - Beautify nested XML file architectures with custom indent spacing rules.
• HTML Formatter - Clean up nested HTML tag trees with correct alignment tabs.
• CSS Beautifier - Convert compressed CSS style blocks into cleanly indented blocks.
• JavaScript Beautifier - Clean raw code structures by arranging lines and parameters.
• SQL Formatter - Format complex SELECT / JOIN queries into readable query segments.
• Regex Tester - Test regular expressions in real-time with highlighted match summaries and groups.
• UUID Generator - Generate RFC4122 compliant random Version 4 UUID strings in bulk.
• Hash Generator - Generate multi-cipher cryptographic hash signatures (MD5, SHA-1, SHA-256, SHA-512) simultaneously.
• SHA256 Generator - Generate exact SHA-256 standard cryptographic checksum signatures for files or text.
• MD5 Generator - Generate standard 128-bit MD5 checksum hashes for testing and integrity validation.
• JWT Decoder - Decode JSON Web Tokens (JWT) and inspect payload JSON structures instantly.
• JWT Encoder - Sign and generate JSON Web Tokens (JWT) with mock algorithms.
• Unix Timestamp Converter - Convert Unix epochs (seconds/milliseconds) to readable UTC & local calendar date-times.
• Cron Expression Generator - Build schedule cron strings using step selectors (minutes, hours, days, months).
• Cron Expression Reader - Decode standard cron configurations into simple human-readable timelines.
• HTML Preview - Render and run HTML, CSS, and JS snippet templates inside an isolated sandbox iframe.
• CSS Minifier - Remove whitespace and line breaks from CSS structures to reduce stylesheet size.
• JavaScript Minifier - Minify standard JavaScript code inputs by stripping comments and compacting variables.
• JSON to TypeScript & Schema Converter - Convert raw JSON into TypeScript Interfaces, Zod schemas, JSON Schema, GraphQL types, Mongoose models, or Python typed classes instantly.
• JSON Minifier - Compress JSON trees into single, compact string lines by stripping whitespace.
• XML Validator - Verify syntax compliance of XML files with real-time DOM error tags.
• YAML Formatter - Format, align, and prettify YAML configurations using clean indentations.
• HTML Minifier - Minify HTML codes by stripping comments, tabs, line breaks, and space margins.
• SQL Beautifier - Style SQL commands with uppercase keyword formatting and clean line indents.
• Timestamp Converter - Translate date strings to milliseconds, ISO strings, and Unix format.
• Color Converter - Convert color models across HEX, RGB, HSL, and CMYK formats.
• CSV Viewer - Parse and explore CSV datasets inside interactive grid tables.
• XML Viewer - Inspect nested XML files using hierarchical folder-tree menus.

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