Developer tool

JSON Formatter & Validator

Pretty-print, validate, and check JSON for syntax errors.

Get lifetime access → Browse all 199 tools
One-time $25 · all 199 tools included · no subscription, ever

Why people use JSON Formatter & Validator

Use JSON Formatter & Validator right in your browser - no downloads, no extensions, no setup
Built for real workflows: fast, keyboard-friendly, and dark-mode ready
Your code and data are processed for you alone - never shared or resold
One account unlocks the whole developer toolbox, not just this tool

Frequently asked questions

Is JSON Formatter & Validator free to use?

Xerion works on a simple one-time license: $25 once, no subscription, and every tool on the platform is included - JSON Formatter & Validator and 198 others. New accounts can look around before buying.

Is my data private when I use JSON Formatter & Validator?

Yes - JSON Formatter & Validator runs in your browser tab. Your code never leaves your machine for the client-side tools, and account-based tools store data only in your own Xerion account.

Do I need to install anything to use JSON Formatter & Validator?

No. JSON Formatter & Validator runs in any modern browser on Windows, Mac, Linux, iPhone, and Android. There is nothing to download, update, or uninstall.

Does JSON Formatter & Validator work on my phone?

Yes - every Xerion tool is built mobile-first, and JSON Formatter & Validator works on any phone or tablet with a modern browser.

What else is included with JSON Formatter & Validator?

Your license unlocks all 199 tools on Xerion - developer tools like this one, plus PDF tools, planners, trackers, generators, and more. Browse the full directory to see everything.

More developer tools on Xerion

What Is My IP
See your public IP address instantly with IPv4/IPv6 detection - then inspect any address...
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
URL Encoder / Decoder
Percent-encode or decode text for safe use in URLs.
Slug Generator
Turn any title or phrase into a clean, URL-friendly slug.
Number Base Converter
Convert numbers between binary, octal, decimal, hex, and any base 2-36.
Regex Tester
Test a regular expression against a string and see all matches.

One license. Every tool. Forever.

JSON Formatter & Validator and 198 other tools for a single one-time $25. No subscription. No ads. No upsells mid-task.

Get lifetime access →