Validate JSON step by step

How to use the JSON validator

Assign a JSON Schema to a document, use schema-aware editing feedback, run an explicit validation, and follow each result back to the JSON value and schema rule that need attention.

Explore JSON validation Download JSONBuddy

JSONBuddy validation Results pane with an error, JSON location, schema location, and suggested fix — The Results pane connects a missing required property to both its JSON position and the relevant schema definition.

AssignConnect data to a schema
DiagnoseInspect result locations
VerifyRun the check again

The common desktop path

Move from an open JSON document to a verified correction

This landing page covers the interactive Windows editor workflow. The validation debugger, streaming validator, and command-line validator remain separate pages because they answer different tasks.

Open the JSON document and assign a schema

Open the document, then use the Quick Associations pane to select the root JSON Schema.

JSONBuddy Quick Associations pane with library_schema.json assigned as the JSON root schema — Quick Associations provides the root-schema field and schema-pool selection.

Edit with schema-aware feedback

Use syntax coloring, folding, brace highlighting, and context-sensitive entry helpers while the assigned schema remains in context. Background validation can expose errors directly in the editor as the document changes.

JSONBuddy editor showing a missing required title property and schema-aware property suggestions — An inline diagnostic and entry helper keep the failed rule close to the edit.

Run validation and inspect every result

The Results pane lists validation and well-formedness findings and supports copying the result set for review.

JSONBuddy validation Results pane listing a missing required property and its schema location — The result identifies the JSON position, schema definition, and an available correction.

Fix the document and validate again

Select a result to return to the related editor position, compare the instance location with the violated schema rule, make the correction, and repeat validation until the intended check passes.

Platform availability

Choose where to run this workflow

Desktop / WindowsFeatured access: interactive schema assignment, editing, diagnostics, and correction in JSONBuddy.
CLI / CIAvailable as a separate automation path after the interactive rule has been tested.

Choose the next validation task

Continue without collapsing distinct workflows

Use Help for concise current-product instructions, the validator overview for capability evaluation, batch validation for collections of files, and the CLI hub for scripts and CI.