GraphQL Playground
Format, validate and inspect GraphQL queries without a server
Runs 100% in your browser — nothing is ever uploaded.
What is GraphQL Playground?
Paste any GraphQL document — queries, mutations, subscriptions or fragments — to validate its syntax, pretty-print it with consistent indentation, or minify it for logging. The analyzer breaks down each operation: type, name, variables, referenced fragments and maximum selection depth. No endpoint needed, no schema required — everything runs locally in your browser.
How to use GraphQL Playground
- Paste a GraphQL query, mutation or full document.
- Click Format to pretty-print or Minify to compress it.
- Fix any syntax errors reported with line and position.
- Review the operation breakdown: variables, fragments and depth.
Frequently asked questions
Do I need a GraphQL endpoint or schema?
No. The tool parses the GraphQL document itself, so you can lint and format queries without connecting to any API. That also means schema-specific checks (unknown fields) are out of scope — it validates syntax and document structure.
What errors does the validator catch?
Unbalanced braces and parentheses, invalid tokens, unclosed strings, empty selection sets, duplicate operation names and undefined fragment references — the most common mistakes that break a request before it reaches the server.
Are my queries private?
Yes. Parsing, formatting and analysis all run in-browser. Queries, variable names and anything sensitive in them never leave your device.
Is my data uploaded anywhere?
No. Every DataForge tool runs entirely in your browser. Text and files are processed locally and never sent over the network.
Are the conversions accurate?
Yes — we use the same battle-tested libraries developers use in production (native Web Crypto for hashes, js-yaml for YAML), so output matches what your toolchain produces.
Is there a size limit?
No hard limit. Processing happens on your machine, so even large documents convert in milliseconds.