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Online JSON Formatter: Quick JSON Beautifier & Validator

Easily read and debug complex, low-readability JSON data at a glance.
Vivoldi JSON Formatter not only prettifies complex code but also provides real-time syntax validation, minification, and escaping tools.

Optimize your data instantly in your web browser without any installation and boost your development productivity.

Have questions?
Check the FAQ.

‘Vivoldi JSON Formatter’ is a tool that prettifies JSON data with low readability.

It goes beyond simple formatting to provide real-time syntax validation, code minification, key sorting, and escape conversion.
In addition to JSON, it supports XML and YAML format conversion and a tree structure view (Tree View), allowing you to grasp complex data structures at a glance.

Yes, it is safe. The Vivoldi online tool processes your data in real-time within the browser without saving it to a server.

You can safely perform optimization tasks without worrying about the leakage of personal information or sensitive API response data.

When you paste JSON data into the input field, Vivoldis real-time syntax validator is instantly activated.
If there is a syntax error, it guides you to the exact line and column where the error occurred with a red highlight.

Through the ‘Syntax Error’ message, you can immediately correct misplaced quotes or commas to complete a valid JSON format.

Yes, we support ‘Full Screen Mode’ for developers using large monitors.

By clicking the full-screen icon in the upper right corner of the screen, you can utilize the full width of the browser to comfortably view large datasets.
Additionally, you can save up to 10 frequently used datasets in your ‘Favorites’ to quickly load them whenever needed.

Absolutely. Using the ‘Key Sort’ feature, you can instantly organize mixed-up JSON keys in ascending (A to Z) or descending (Z to A) order.

You can choose to sort not only at the root level but also within specific objects, making it highly efficient for data comparison and documentation tasks.