GraphQL Formatter — Free Online Tool
Paste any GraphQL query, mutation, fragment, or schema definition and format it with consistent indentation. The parser validates syntax and reports errors with position. Uses the official graphql-js parse + print functions.
100% client-side. No uploads. Your data never leaves your browser.
How to use GraphQL Formatter
- Paste a GraphQL query, mutation, or schema.
- Click 'Format' or wait for live formatting.
- Syntax errors are shown in the error banner.
- Copy or download the formatted result.
Frequently Asked Questions
Does this validate GraphQL syntax?
Yes. The parse step validates syntax and reports errors with line/column positions.
Can I format GraphQL schemas?
Yes. SDL (Schema Definition Language) is fully supported alongside queries, mutations, and fragments.
Which GraphQL spec does this support?
The graphql-js library implements the June 2018 GraphQL spec, compatible with all major GraphQL servers.
Related tools
Related reading
Browse all free tools · theproductguy.in