Developer Tools
Free developer tools for JSON, Base64, regex, code formatting, and more.
CSV to JSON
Convert CSV data to JSON format. Paste CSV, get structured JSON.
JSON Formatter
Format and validate JSON. Paste minified JSON, get pretty-printed output.
Base64 Encode/Decode
Encode and decode Base64 strings. Supports Unicode.
URL Encode/Decode
Encode and decode URL-encoded strings. Percent-encoding.
UUID Generator
Generate random UUID v4 identifiers. One click, instant result.
JSON to CSV
Convert JSON array to CSV format. Paste JSON, get comma-separated output.
Timestamp Converter
Convert between Unix timestamp and human-readable date.
Password Generator
Generate secure random passwords. Customize length and character types.
JWT Decoder
Decode JWT tokens. View header and payload as JSON.
Hash Generator
Generate MD5, SHA-256, SHA-512 hashes. Paste text, get hash.
Color Converter
Convert between HEX, RGB, and HSL color formats. Color picker included.
QR Code Generator
Generate QR codes from text or URLs. Choose size, download as PNG.
QR Code Color Changer
Generate QR codes with custom colors. Change foreground and background colors.
Regex Tester
Test regular expressions against sample text. Highlight matches with g, i, m flags.
Markdown Preview
Preview Markdown as rendered HTML. Headings, lists, code blocks.
YAML to JSON
Convert YAML to JSON and JSON to YAML. Bidirectional conversion with error handling.
HTML to Markdown
Convert HTML to Markdown. Headings, lists, links, tables supported.
Cron Expression Generator
Generate cron expressions visually.
SQL Formatter
Format messy SQL into readable format.
HTML Formatter
Format HTML code with proper indentation.
URL Parser
Parse URLs into components: protocol, hostname, path, query parameters.
HTTP Status Code Lookup
Search HTTP status codes. 404 → Not Found.
JSON Validator
Validate JSON and show errors.
HTML Escape / Unescape
Escape and unescape HTML characters.
UUID Validator
Validate if a string is a valid UUID.
Color Palette Generator
Generate color palettes from a base color.
Strong Password List Generator
Generate multiple strong random passwords.
QR Code Batch Generator
Generate multiple QR codes from a list of inputs.
UUID List Generator
Generate multiple UUID v4 values.
XML to JSON Converter
Convert XML data into JSON.
JSON to XML Converter
Convert JSON data into XML format.
Markdown to HTML Converter
Convert Markdown text into HTML.
HTML to Text Converter
Extract readable text from HTML.