JSON size analyzer
Compare the UTF-8 byte size of original, compact and formatted JSON.
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JSON size analyzer — workspace
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How to use: JSON size analyzer
Start with the example, or replace it with your own values.
Review Text or data, then select “Get result”.
Read the result, then copy or download it. Edit any input to try again.
What you can do
- Compare the UTF-8 byte size of original, compact and formatted JSON.
What you get
- A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.
What you need
- Text or data
- Enter or paste your value, or start with the example.
Try an example
- Text or data
{"name":"Sara","active":true,"scores":[8,10]}
Good to know
- JSON numbers use JavaScript precision. Keep long IDs in quotes. Flattening uses JSON Pointer paths and keeps arrays intact; merging replaces top-level fields.
Your work stays on your device
Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.
Questions & answers
Is JSON size analyzer free?
Yes. JSON size analyzer is free to use and does not require an account.
Are my files or entered values uploaded?
Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.
What result can I save?
A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.
What should I check before using the result?
JSON numbers use JavaScript precision. Keep long IDs in quotes. Flattening uses JSON Pointer paths and keeps arrays intact; merging replaces top-level fields.