Developer Tools

Generate realistic mock data from TypeScript interfaces. Supports multiple types with customizable counts and exports to JSON, CSV, XML, YAML, or SQL formats.

Create and read cron expressions with human-friendly previews.

Preview and optimize your webpage's Title, Description, and URL for Google search results. Check character counts and estimated pixel widths.

Convert between JSON and TOON (Token-Oriented Object Notation) format. TOON reduces LLM token usage by 30-60% for structured data while maintaining readability.

Generate lorem ipsum text in multiple languages. Create paragraphs, sentences, or words using Faker.js with support for 40+ languages including Chinese, Japanese, Korean, Thai, Vietnamese, Indonesian, and more.

Generate essential Open Graph and X Card meta tags for improved social sharing previews and SEO.

Highlight matching text in real-time using your custom regular expressions.

Generate icons from image for all platforms (Windows, Apple, Android, Browser, Huawei) from a single image. Upload JPG, PNG, GIF, WebP, or AVIF and download all icons as a ZIP file.

Decode and inspect JSON Web Tokens (JWTs). Instantly view header, payload, signature, and expiration status.

Generate v1 or v4 UUIDs, validate existing ones, detect versions, and inspect v1 timestamps.

Encode text or files to Base64, or decode Base64 back to its original form. Supports text input and file drag-and-drop.

Convert colors between HEX, RGB, HSL. Get Tailwind suggestions and pick colors from your screen.

Analyze and fix your Git commit messages against Conventional Commits standards. Get instant feedback and automatically format messages to follow best practices.

Convert JSON object keys and values between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.

Format, beautify, minify, and validate YAML online. Supports YAML 1.1 and 1.2, multi-document files, JSON Schema validation, key sorting, and anchor/alias handling. Deterministic output with customizable indentation and line width.

Format, minify, sort keys, and validate JSON/JSONC/JSON5 with optional JSON Schema validation. Supports comments and trailing commas.

Instantly convert JSON objects or arrays into clean TypeScript interfaces or type aliases.

Convert TypeScript type and interface definitions between camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE.

Instantly convert data between YAML and JSON formats with real-time updates and syntax highlighting.

Generate MD5, SHA-1, SHA-256, SHA-512, and bcrypt hashes. Verify strings against known hashes.

Generate collision1 -resistant unique identifiers (CUID vand CUID2) instantly.

Estimate original and compressed (gzip, brotli) sizes for text or files to gauge network transfer impact.

Calculate and analyze IPv4 and IPv6 addresses, including binary, decimal, and hexadecimal representations, network classes, and special address types.

Upload .proto files, decode/encode gRPC messages, explore schemas, compare messages, and generate mock data. Full-featured gRPC development toolkit with Monaco Editor integration.

Convert Unix timestamps (seconds/ms), ISO 8601 strings, and human-readable dates. View local time, relative time, and next cron times.

Decode, verify (HMAC), and generate JSON Web Tokens (JWT) directly in your browser.

Quickly analyze pasted HTML for basic on-page SEO structure: heading counts (H1, H2, H3), missing image alt text, and internal/external link counts.