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JSON tool

JSON Key Extractor

List every unique key used in a JSON document.

Runs on-deviceNo sign-upFree
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JSON Key Extractor workspace

Workspace

JSON Key Extractor

Runs locally
201 chars · 23 wordsStays in this tab
Output

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

JSON Key Extractor is a free browser-based json tool. List every unique key used in a JSON document. It runs with JavaScript locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is JSON Key Extractor?

JSON Key Extractor is a free browser-based json tool from utils.sbs. List every unique key used in a JSON document. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

CategoryJSON
InputPlain text, code, markup or JSON
OutputA downloadable text or code file
EngineJavaScript
ProcessingIn your browser
PriceFree
AccountNot required

How JSON Key Extractor works

Text is processed in the browser with JavaScript and downloaded from a local blob. Nothing is uploaded.

How to use JSON Key Extractor

  1. 1Open JSON Key Extractor and add your input.
  2. 2Use the default settings, or choose the format or detail level that matches your goal.
  3. 3Run the tool, check the preview or result, and download the output.

When to use JSON Key Extractor

  • Clean, transform or compare text before using it elsewhere.
  • Convert markup, JSON or structured text between formats.
  • Count, format or inspect content quickly in the browser.

Limitations

Very large inputs may be limited by the browser's available memory.

Privacy and accuracy

JSON Key Extractor processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

JSON Key Extractor questions

  • What can I do with JSON Key Extractor?

    List every unique key used in a JSON document. JSON Key Extractor is part of the JSON shelf on utils.sbs and is designed for quick, one-off tasks.

  • Is JSON Key Extractor free to use?

    Yes. JSON Key Extractor is free, requires no account, and has no per-file or per-use charge.

  • Are my files uploaded when I use JSON Key Extractor?

    No. JSON Key Extractor is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

  • What formats does JSON Key Extractor support?

    It works with plain text, code, markup and structured text, and returns a downloadable text file.

  • Can I use JSON Key Extractor on my phone?

    Yes. JSON Key Extractor is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

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