Developer Toolkit

The small utilities you reach for every day while debugging: formatters, encoders, generators and converters, grouped by the job.

25 free tools · no signup

Data formats

JSON Formatter
Format and validate JSON instantly. Free online JSON formatter — paste messy JSON, beautify or minify, catch errors in your browser.
JSON to CSV Converter
Convert JSON to CSV and CSV to JSON online free. Flattens nested objects, handles quotes and commas, opens in Excel. Free online JSON to CSV converter.
JSON to YAML Converter
Convert JSON to YAML and YAML to JSON with this free online converter. Handles anchors, merge keys, multi-line strings and multiple documents with clear errors.
XML Formatter
Format, beautify and validate XML with this free online XML formatter. Pretty-print with spaces or tabs, minify, and see the exact line of any error.
SQL Formatter
Format and beautify SQL queries with this free online SQL formatter: clean line breaks, indentation and uppercase keywords, or minify to one line.
Markdown to HTML Converter
Convert Markdown to HTML with this free online editor and live preview. Supports GitHub tables, task lists and code blocks — copy clean, safe HTML or download.

Encoding & tokens

Generate & hash

Text & patterns

Time & scheduling

Web & CSS