Paste JSON, upload a file, or load from a URL. Format, validate, minify, compare and convert JSON right in your browser. Your data never leaves your device.
A complete toolkit for developers, QA engineers, and data teams. Every tool runs locally in your browser.
A JSON Formatter (also called a JSON Beautifier) is an online tool that transforms raw, minified, or unformatted JSON data into a clean, indented, human-readable structure with syntax highlighting.
When working with APIs, configuration files, or application logs, JSON data is often returned as a single compressed line — impossible to read at a glance. A formatter applies proper indentation, line breaks, and colour coding so you can understand the structure instantly.
Unlike basic formatters that only prettify JSON, JSONFormatterPro includes a full JSON validator, diff tool, tree viewer and format converter in one interface.
package.json, tsconfig.json, Docker and Kubernetes configs before deploying..json file, or drag and drop. You can also load JSON from any public API URL..json, .csv, .xml or .yaml file.Formatting JSON online with JSONFormatterPro takes under 10 seconds and requires no installation, signup or configuration. Everything you need is on this page.
Ctrl + Enter — Run the selected actionCtrl + Shift + C — Copy output to clipboard.json file onto the input areaWhen you format JSON online, always validate at the same time to catch hidden syntax errors. Use 2-space indentation for web projects and APIs, and 4-space indentation for configuration files where readability matters more than size.
For production deployments, use the JSON Minifier to compress payloads. Before committing to version control, use the JSON Sorter to sort keys — this makes JSON diffs dramatically cleaner.
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