UUID / GUID Generator (V4)
Generate one or more unique, random **UUIDs (GUIDs)** instantly.
Explore More Developer Tools
Format, Validate, and Generate Data Instantly
TrueFormatter provides essential utilities for modern web development, including JSON formatting, YAML conversion, and more.
JSON Auto-Fixer & Formatter
Repair, validate, and beautify broken JSON (missing quotes, trailing commas).
JSON Compare & Diff Tool
Find the difference between two JSON objects visually and quickly.
CSS Minifier & Compressor
Optimize CSS by removing whitespace and comments to accelerate page load time.
JS Minifier & Compressor
Compress JavaScript to improve website speed and performance.
YAML ⇆ JSON Converter
Convert YAML to JSON or JSON to YAML instantly.
UUID / GUID Generator
Generate unique V4 UUIDs for database keys or testing.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) Header and Payload.
Base64 Encoder ⇆ Decoder
Encode text to Base64 and decode Base64 to text for API debugging.
URL Encoder & Decoder
Cleanly encode special characters in URLs and decode query strings.
Frequently Asked Questions
True Formatter helps you format, validate, and beautify your JSON instantly, making it easy to read, debug, and **automatically repair**.
Formatting JSON online saves time, requires no installation, and works directly in your browser without storing your data.
Simply paste your JSON into the editor or upload your JSON file, then click the Format/Beautify button. Your JSON will be formatted instantly.
Yes! TrueFormatter includes a powerful **Auto-Fixer** that can repair common JSON syntax errors. It automatically handles **missing commas**, **trailing commas**, **JSON comments (JSONC)**, unquoted keys, and single quotes, converting them into valid, clean JSON.
The Auto-Fixer specializes in errors that standard parsers reject. This includes fixing **missing commas** between elements, removing **trailing commas** in objects or arrays, stripping **JSON comments** (`//` or `/* */`), quoting **unquoted keys**, and replacing single quotes with double quotes.
After pasting your JSON, click the **'Validate'** button. If the JSON is invalid but repairable, a **yellow alert** will appear with an **orange 'Fix JSON' button**. Click this button for an instant repair.