Free Developer Tools Online
62 free tools — no signup required
Essential utilities for web developers and programmers. Format and minify JSON, CSS, JavaScript, and SQL. Convert between data formats like CSV, XML, YAML, and JSON. Generate meta tags, regex patterns, and code boilerplate. Validate and debug JWTs, cron expressions, and user agents.
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
CSS Minifier
Minify CSS code by removing whitespace, comments, and unnecessary characters.
JavaScript Minifier
Minify JavaScript code to reduce file size.
HTML Prettifier
Format and indent HTML code for better readability.
SQL Formatter
Format and beautify SQL queries with proper indentation.
Markdown Preview
Write Markdown and see the rendered preview in real-time.
HTML Minifier
Minify HTML code by removing whitespace, comments, and redundant attributes.
CSS Formatter
Format and beautify minified CSS code with proper indentation.
JavaScript Formatter
Format and beautify minified JavaScript code.
SVG Optimizer
Optimize SVG files by removing unnecessary metadata and simplifying paths.
XML Formatter
Format, prettify, and minify XML code with syntax validation.
GraphQL Formatter
Format and prettify GraphQL queries, mutations, and schema definitions.