Question 1

Is my JSON uploaded to a server?

Accepted Answer

No. Parsing, formatting and validation all happen in your browser with a recursive-descent parser written for this tool. No request is made with your data, and the tool keeps working if you go offline after the page has loaded.

Question 2

Is there a file size limit?

Accepted Answer

There is no server limit because there is no server. The practical ceiling is your device's memory; documents in the tens of megabytes usually format instantly on a modern laptop.

Question 3

Does it fix invalid JSON automatically?

Accepted Answer

No. It reports the exact line and column of the problem so you can fix the real issue instead of hiding it.

Question 4

What does Sort keys actually do?

Accepted Answer

It sorts object keys alphabetically at every level of the document, including nested objects and objects inside arrays. Array order is preserved.

Question 5

Do I need an account or a paid plan?

Accepted Answer

No. Every feature is free and available without signing up, including minify, sort keys and escape.

Question 6

Can I use it on my phone?

Accepted Answer

Yes. Below 768px the editor switches to a tabbed single pane with 01:INPUT and 02:STDOUT, and uses 16px inputs so iOS does not zoom.

Question 7

Is this a SaaS with billing?

Accepted Answer

The site is built as a product, but nothing here requires payment. There is no account system and no checkout.