Free Developer Tools

Everyday utilities for writing and debugging code, without installing a CLI tool or hunting through documentation. Format and validate JSON, generate hashes, UUIDs and placeholder text, convert between camelCase and snake_case, diff two blocks of text, or build a cron expression and see exactly what it means.

JSON Formatter Pretty-print, minify and validate JSON. Markdown Previewer Type Markdown and see the rendered HTML live. Hash Generator Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes. Base64 Encoder/Decoder Convert text to Base64 or decode Base64 back to text. CSV to JSON Convert CSV data to a JSON array of objects. Image to Base64 Convert an image to a Base64 data URI for embedding in code. Lorem Ipsum Generator Generate placeholder text for mockups and designs. URL Encoder/Decoder Encode text for use in a URL, or decode a URL back to text. Color Converter Pick a color and convert between HEX, RGB and HSL. Slug Generator Turn any text into a clean, URL-friendly slug. Code Case Converter Convert text between camelCase, snake_case, kebab-case, PascalCase and more. JSON to CSV Convert a JSON array of objects into CSV data. Timestamp / Epoch Converter Convert a Unix timestamp to a human date, or the other way around. UUID Generator Generate random UUIDs (v4), one or in bulk. Text Diff / Compare Compare two texts and highlight the differences, line by line. Cron Expression Generator Build and understand cron expressions with a simple form.