API Response Debugging
Format and read API responses from REST and GraphQL endpoints. Spot issues in deeply nested JSON payloads instantly.
JSON Formatter Online
JSON Formatter Online
Lines —Chars —Size ——
Paste JSON data on the left to see formatted json
The All-in-One JSON Toolkit for Developers
Online Data Tools JSON Tools is a free, browser-based JSON formatter, validator, and converter that lets you format, minify, validate, and convert JSON data into CSV, XML, YAML, HTML, SQL, and Excel. Whether you're debugging API responses, cleaning up configuration files, or converting between formats, our tools make it effortless.
Key Features
JSON Formatter
Instantly format and beautify your JSON with customizable indentation. Makes minified JSON readable with syntax highlighting.
JSON Beautifier
Beautify JSON by adding indentation and line breaks to compact data so it is easier to read and debug.
JSON Minifier
Compress JSON by removing all unnecessary whitespace, line breaks, and indentation. Reduce payload sizes instantly.
JSON Tree Viewer
Explore JSON structure with an interactive collapsible tree view. Search, drill-down, and navigate nested data visually.
JSON Validator
Validate JSON syntax with detailed error messages including line and column numbers. Quickly find and fix malformed JSON.
JSON Compare Online
Compare JSON documents online and highlight added, removed, and changedvalues with a structural JSON diff checker.
JSON to CSV Converter
Convert JSON to CSV format with automatic column detection, nested object flattening, and configurable delimiters.
JSON to XML Converter
Transform JSON data into well-formed XML with proper element naming, escaping, and indentation.
JSON to YAML Converter
Convert JSON to clean YAML for Kubernetes manifests, Docker Compose files, and DevOps configuration.
JSON to HTML Converter
Convert JSON arrays to HTML tables with proper headers and structured table markup. Copy or download instantly.
JSON to SQL Converter
Generate CREATE TABLE and INSERT statements from JSON data with automatic column type detection.
JSON to Excel/TSV Converter
Convert JSON to Tab-Separated Values (TSV) for easy Excel import with automatic column detection.
How It Works
1
Paste or Upload JSONPaste your JSON data into the editor, drag & drop a .json file, or click Upload to browse.
2
Choose Your ToolSelect Format to beautify, Minify to compress, Validate to check syntax, or a converter (CSV, XML, YAML, HTML, SQL, Excel).
3
Copy or DownloadCopy the result to clipboard or download it as a file.
Common Use Cases
Data Format Conversion
Convert JSON to CSV, XML, YAML, HTML, SQL, or Excel. Transform data between formats for different tools and workflows.
Config File Validation
Validate and debug configuration files like package.json, tsconfig.json, and .eslintrc with syntax error details.
Payload Optimization
Minify JSON for smaller payloads and faster API transfers. Explore nested structures with the interactive tree view.
Frequently Asked Questions
Are these JSON tools free?
Yes! Online Data Tools JSON Tools are completely free with no sign-up, no ads, and no usage limits.
Is my JSON data safe?
Absolutely. All processing happens in your browser. No JSON data is ever sent to our servers.
Can it handle large JSON files?
Yes. The tools are optimised for large JSON files with 10,000+ lines. Efficient tokenization prevents browser freezing.
What formats can I convert JSON to?
You can convert JSON to CSV, XML, YAML, HTML tables, SQL statements, and Excel/TSV format. All conversions happen instantly in your browser.
Does it validate JSON?
Yes. Click the Validate button to check your JSON syntax. If there are errors, you'll see the exact line and column number where the problem occurs.