Free Online JSON Tools
for Developers
Format, validate, minify, compare, and convert JSON — all in your browser. Your data never leaves your machine.
JSON Formatter
Format and pretty print JSON with customizable indentation. Includes auto-fix for common syntax errors.
JSON Validator
Validate JSON syntax and get precise error messages with line and column numbers.
JSON Minifier
Remove whitespace and compress JSON to reduce file size. Shows real-time compression stats.
JSON Diff
Compare two JSON documents side by side. Find additions, deletions, and modifications instantly.
JSON Viewer
Explore JSON data with a collapsible tree view. Navigate complex structures with ease.
JSON to CSV
Convert JSON arrays to CSV for spreadsheets. Supports nested objects and custom delimiters.
JSON to XML
Convert JSON to well-formatted XML. Handles nested objects and arrays with proper structure.
JSON to YAML
Convert JSON to YAML for configuration files. Supports Kubernetes, Docker, and CI/CD workflows.
JSON Path Finder
Extract data using JSONPath expressions. Click elements to discover paths interactively.
Why Use JSONTools.pro?
Blazing Fast
Client-side processing delivers instant results.
Privacy First
Your data stays in your browser. No tracking.
No Install
No downloads, no accounts. Just open and use.
100% Free
No limits, no sign-up, no premium tiers.
Frequently Asked Questions
Everything you need to know about our JSON tools
What is JSONTools.pro?
JSONTools.pro is a free collection of browser-based JSON utilities for developers. It includes a formatter, validator, minifier, diff tool, viewer, and converters for CSV, XML, and YAML.
Is my data safe when using these tools?
Yes. All processing happens directly in your browser. Your JSON data is not uploaded to or stored on any server unless a specific operation requires server-side processing, in which case the data is processed and immediately discarded.
Are these tools really free?
Yes, all tools on JSONTools.pro are completely free to use with no account required.
Do I need to install anything?
No. All tools run directly in your web browser. There is nothing to download or install.
What browsers are supported?
JSONTools.pro works in all modern browsers including Chrome, Firefox, Safari, and Edge.