How to use the JSON Analyzer
- Enter or paste your input in the box (or set the options, if the tool needs no input).
- Adjust the options to match what you need — the result updates as you type.
- Copy the result or download it, and keep editing if you want a different outcome.
What does this tool do?
Reports whether the JSON is valid, the type of the root, its byte size (also minified), the maximum nesting depth and how many objects, arrays, strings, numbers, booleans and nulls it contains. The most frequent key names help you understand an API response at a glance.
Everything runs in your browser, so nothing you enter is uploaded or stored.
Why use it?
- Free, with no sign-up and no limits.
- Instant results as you type.
- Private — your data stays on your device.
Example
Input: {"a":[1,2],"b":null}
Result: Maximum depth: 3 · Arrays: 1 · Nulls: 1
Privacy
Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us. There's no account to create and nothing to install.
Frequently asked questions
Is large JSON supported?
Several megabytes work fine in modern browsers, since nothing is uploaded.
Is the JSON Analyzer free to use?
Yes. It is free, needs no account and has no daily limit.
Last reviewed by the M2Toolkit team.