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How to get the size of JSON object with JavaScript?

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Sometimes, we want to get the size of JSON object with JavaScript.

In this article, we’ll look at how to get the size of JSON object with JavaScript.

How to get the size of JSON object with JavaScript?

To get the size of JSON object with JavaScript, we use the TextEncode constructor.

For instance, we write

const size = new TextEncoder().encode(JSON.stringify(obj)).length;
const kiloBytes = size / 1024;
const megaBytes = kiloBytes / 1024;

to create a TextEncoder object and call its encode method with the JSON string we want to get the size of.

Then we get the size of that with length in bytes.

Next, we get the size in KB and MB by dividing each by 1024.

Conclusion

To get the size of JSON object with JavaScript, we use the TextEncode constructor.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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