Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Format, beautify, and minify GraphQL queries.
GraphQL is a query language for APIs developed by Meta. It allows clients to request exactly the data they need, making APIs more efficient and flexible. GraphQL queries have a structured, hierarchical format that benefits from proper formatting for readability.
This tool helps you format GraphQL queries, mutations, subscriptions, and fragments with consistent indentation and line breaks.
This tool supports queries, mutations, subscriptions, and fragments. All standard GraphQL syntax including variables, directives, inline fragments, and aliases are preserved.
No. All formatting happens entirely in your browser using JavaScript. Your queries never leave your device.
Format adds proper indentation and line breaks for readability. Minify removes all unnecessary whitespace and comments to produce the smallest possible query string for production use.
Format and beautify SQL queries
Format and validate JSON data
Format JavaScript code
Format and beautify HTML code
Format and beautify CSS code
Format and validate XML documents
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