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Deterministic JSON Serializer

Sort object keys recursively and serialize compactly for reproducible comparison.

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  1. 01

    Add your input

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  2. 02

    Make it yours

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  3. 03

    Take the result

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Stable JSON stringifier online

Sort object keys recursively and serialize compactly for reproducible comparison. Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

How to use it

Paste JSON matching the structure in the example. Choose Run tool. Review the output, then copy or download it.

Worked examples

Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

Reproducible worked example

Settings: No additional settings.

Input:

{"z":1,"a":{"b":2,"a":3}}

With the input and settings above, the tool produces:

Output:

{"a":{"a":3,"b":2},"z":1}

For this input, “z” is 1. These are the named fields in the example output.

Limitations and common mistakes

  • Deterministic JavaScript JSON serialization; not advertised as a complete RFC 8785 canonicalization implementation.
  • Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.

Frequently asked questions

What format should I enter?

Paste JSON matching the structure in the example. The worked example shows the supported structure and actual output.

How can I order object keys recursively and serialize compactly for reproducible comparison in JSON online?

Paste JSON matching the structure in the example. Choose Run tool. Review the output, then copy or download it.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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