Format, validate, convert, and manipulate JSON data with free online tools.
JSON (JavaScript Object Notation) is the backbone of modern data exchange. Whether you're debugging an API response, editing a config file, or transforming data between systems, you need reliable tools that handle JSON correctly. This collection covers the full JSON workflow: formatting messy payloads into readable structures, validating syntax with precise error locations, minifying for production, and converting between JSON and formats like YAML, CSV, and XML. Every tool processes your data directly in the browser — nothing is sent to a server. If you work with REST APIs, GraphQL, package.json files, or any JSON-based configuration, these tools save time on tasks you'd otherwise do manually or with installed software.
Popular in JSON Tools
Format and beautify JSON data instantly
Free online JSON formatter and beautifier. Paste your JSON and get perfectly indented, readable output with syntax validation.
Validate and lint JSON with detailed error messages
Free online JSON validator and linter. Check if your JSON is valid and get precise error locations with helpful messages.
Compress JSON by removing whitespace
Free online JSON minifier. Remove all unnecessary whitespace and formatting from JSON data to reduce file size.
All JSON Tools
Format and beautify JSON data instantly
Validate and lint JSON with detailed error messages
Compress JSON by removing whitespace
Convert JSON data to YAML format
Convert JSON arrays to CSV format
Convert CSV data to JSON format
Convert YAML to JSON format instantly
Convert JSON data to XML format
Convert XML documents to JSON format
Generate Go structs from JSON data
Convert JSON to Python dictionary syntax
Generate Java classes from JSON data
Validate JSON data against a JSON Schema
Test JSONPath expressions against JSON data
Explore JSON data as a collapsible tree
Compare two JSON documents structurally
Edit JSON interactively with a visual editor
View JSON arrays as sortable tables
No browser-only tools in this category.
About JSON Tools
Format, validate, convert, and manipulate JSON data with free online tools. All tools in this category run entirely in your browser with no server-side processing. Your data stays on your device.
Each tool is designed for speed and simplicity. Paste your input, configure options if needed, and copy the result with one click. No sign-up, no installation, no limitations.