Extract JSON Keys

Extract JSON Keys pulls out all keys from any JSON object or array. Includes nested keys, live output, and quick copy or export options.

Paste your input above or import a file below.
No file chosen
Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total keys: 0
Options
Include nested keys

How to Use:

Paste your JSON into the input box or import a file with “Choose File.” By default, the tool lists every key it finds even nested ones. If you only want top-level keys, turn off the “Include nested keys” toggle. As you type or import, the output updates live in the right-hand box. A character count below the result helps you track how many keys were found. Hit “Copy Output” or “Export to File” to save what you see, or “Clear All” to reset and start again.

What Extract JSON Keys can do:

Extract JSON Keys gives you a fast, accurate list of every key in your data even deep inside nested objects. It works on objects and arrays, making it handy for everything from debugging and mapping to generating schema outlines. You can toggle whether you want full paths like user.name.first or just the top-level ones. It doesn’t alter the data it just extracts the structure, right in your browser.

Example:

Input:

{
  "user": {
    "name": {
      "first": "Alice",
      "last": "Smith"
    },
    "active": true
  },
  "roles": ["admin", "editor"]
}

Output (nested keys on):

user
user.name
user.name.first
user.name.last
user.active
roles

Common Use Cases:

Use Extract JSON Keys when exploring new APIs, building documentation, debugging mismatches, or reverse-engineering structure from unknown data. It’s especially useful when you’re handed a massive object and need a quick look at what’s inside no expansion, no noise, just the keys.

Useful Tools & Suggestions:

Once the keys are pulled out, Find JSON Keys/Values can be used to grab the values too and give a fuller picture. And if the layout feels too dense, Prettify JSON helps space things out so the structure makes more sense.

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