Free developer tools for JSON, Base64, regex, code formatting, and more.
Convert CSV data to JSON format. Paste CSV, get structured JSON.
Compare two JSON objects and highlight differences.
Format and validate JSON. Paste minified JSON, get pretty-printed output.
Minify JSON to a single line. Remove whitespace and newlines.
Minify HTML. Remove comments, collapse whitespace.
Minify CSS. Remove comments and whitespace.
Encode and decode Base64 strings. Supports Unicode.
Encode and decode URL-encoded strings. Percent-encoding.
Generate random UUID v4 identifiers. One click, instant result.
Convert JSON array to CSV format. Paste JSON, get comma-separated output.
Convert between Unix timestamp and human-readable date.
Generate secure random passwords. Customize length and character types.
Decode JWT tokens. View header and payload as JSON.
Create JWT tokens from header and payload. HMAC-SHA256 signing.
Parse .env format. Validate and convert to JSON.
Convert request to cURL command.
Compare two texts by their hash values.
Generate MD5, SHA-256, SHA-512 hashes. Paste text, get hash.
Convert between binary, octal, decimal, and hexadecimal.
Convert between text and Morse code.
Encode/decode text with ROT13. Same operation reverses it.
Convert between HEX, RGB, and HSL color formats. Color picker included.
Check WCAG contrast ratio between foreground and background colors. AA/AAA compliance.
Generate QR codes from text or URLs. Choose size, download as PNG.
Generate barcodes (Code128, EAN13, UPC). Download as PNG.
Generate QR codes with custom colors. Change foreground and background colors.
Test regular expressions against sample text. Highlight matches with g, i, m flags.
Preview Markdown as rendered HTML. Headings, lists, code blocks.
Convert YAML to JSON and JSON to YAML. Bidirectional conversion with error handling.
Convert HTML to Markdown. Headings, lists, links, tables supported.
Convert px to rem and rem to px. Base font size 10, 14, 16, 18px. Batch conversion.
Generate cron expressions visually.
Format messy SQL into readable format.
Format HTML code with proper indentation.
Parse URLs into components: protocol, hostname, path, query parameters.
Search HTTP status codes. 404 → Not Found.
Validate JSON and show errors.
Validate JSON against a JSON Schema.
Escape and unescape HTML characters.
Validate if a string is a valid UUID.
Generate color palettes from a base color.
Generate multiple strong random passwords.
Generate multiple QR codes from a list of inputs.
Generate multiple UUID v4 values.
Format and beautify XML with indentation.
Convert XML data into JSON.
Convert JSON data into XML format.
Convert Markdown text into HTML.
Extract readable text from HTML.
Convert JSON data to YAML format.
Format and validate YAML. Pretty-print and fix indentation.
Decode HTML entities including numeric and named entities.
Calculate network address, broadcast, and host range from IP and CIDR.
Format CSS with proper indentation.
Generate linear/radial gradient CSS. Set colors and positions, copy code.
Generate box-shadow CSS. Adjust offset, blur, spread, color.
Format GraphQL queries, mutations, and SDL.