GraphQL Query Builder

The GraphQL Query Builder is a free online tool that visually build graphql queries, mutations, and subscriptions with dynamic field trees, variables, fragments, and live output.. It runs entirely in your browser with no installation or sign-up needed.

Query, Mutation, and Subscription. The builder adjusts syntax per operation type.

Define typed variables ($userId: ID!) in the Variables section, reference them in arguments. Fragments define reusable field selections on a type.

Yes — client-side, no registration, no server.

Absolutely. The GraphQL Query Builder processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the GraphQL Query Builder is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the GraphQL Query Builder in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The GraphQL Query Builder supports a wide range of popular formats and languages. Check the tool interface for the full list of supported options.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The GraphQL Query Builder works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

A query reads data without changing anything — it asks the server for specific fields and gets them back, much like a GET request. A mutation writes data: it creates, updates, or deletes records and usually returns the affected object so you can confirm the change. Both use the same selection-set syntax for choosing which fields come back, but they declare different operation keywords (query versus mutation) and mutations almost always take input arguments, often a typed variable like an input object. There is also a third type, subscription, which keeps a connection open for real-time updates. In this builder you pick the operation type up front and it adjusts the generated keyword and structure to match, so you can switch between a read query and a write mutation without rewriting the wrapper by hand.

Declare each input as a named variable in the operation signature, give it a GraphQL type such as ID!, Int, or String, then reference it inside an argument with a dollar sign — for example user(id: $userId). Sending values separately as a JSON object keeps the query reusable, lets your client cache it, and avoids the quoting and escaping mistakes that come from injecting raw values into the string. The exclamation mark after a type means the variable is required. In this builder, declaring variables in the Variables section emits them in the signature automatically, and typing a value that begins with $ inside any argument is recognized as a variable reference. It also produces a ready-to-paste Variables JSON object alongside the query, so you can drop both straight into Postman or your API client.

A fragment is a named, reusable set of fields defined on a specific type — for example fragment UserFields on User { id name email }. Instead of repeating the same field selection in several places, you define it once and spread it wherever you need those fields. Fragments keep large queries readable, guarantee that two parts of a request ask for the same shape, and make schema changes easier because you edit the field list in one spot. They are especially useful when several queries return the same object type or when a UI component always needs the same properties. In this builder you add a fragment, give it a name and a target type, and build its field tree the same way you build the main selection — the generated output includes the fragment definition so it is ready to use immediately.

GraphQL is designed so the client declares exactly which fields it wants, and the server returns only those — nothing more. This is the opposite of a typical REST endpoint, which sends a fixed payload regardless of what you actually use. Asking for precise fields means smaller responses, less over-fetching of data you will throw away, and no extra round trips to gather related records, since you can nest sub-selections to pull connected objects in one request. The trade-off is that every field you want must be named explicitly in the selection set, which is easy to get subtly wrong by hand as queries grow. This builder makes that explicit selection visual — you click to add and nest fields to any depth, and it writes the matching selection set so the structure mirrors the data shape you need.

Prettified output is formatted across multiple lines with consistent indentation, so nested selection sets, arguments, and fragments are easy to read and review — it is the format you want when committing a query to source control or sharing it with teammates. Minified output collapses the same query onto a single line with the extra whitespace stripped out, which is handy when you embed the query string directly inside code or a configuration value where line breaks are awkward. The two are functionally identical to the server; only the whitespace differs, so you can switch freely without changing behavior. In this builder a single toggle flips between the two views instantly, and from either one you can copy the query, copy the Variables JSON, or download the operation as a .graphql file.