Developer Tools
A collection of essential developer utilities that run entirely in your browser. Format messy code, convert between data formats, generate identifiers, and validate structured data — all without sending anything to a server.
Code Formatter Online
PopularFormat JSON, HTML, CSS, JavaScript, SQL, XML, YAML with auto-detection.
HTML Formatter Online
Beautify, minify, and validate HTML code with tag checking.
CSS Formatter Online
Beautify, minify, and validate CSS stylesheets with nesting support.
YAML Formatter Online
Format, validate, and convert YAML to JSON instantly.
XML Parser Online
Parse, format, validate, minify and convert XML to JSON.
CSV to JSON Converter
Transform CSV spreadsheet data into JSON format instantly.
Cron Schedule Generator
Build cron expressions visually with natural language input.
UUID Generator
Generate single or bulk UUID v4. Copy, download, validate.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text.
Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates.
Markdown to HTML
Convert Markdown to clean HTML with live preview.
Token Counter
Estimate GPT & Claude token usage and API costs.