Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What does the Markdown Table to JSON Array Sizer give me?

It works out JSON Array Object Count and Estimated LLM Token Count, updating live as you change the inputs.

What do I need to enter?

Just Data Rows and Table Columns. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Markdown Table to JSON Array Sizer

Calculate JSON object count, payload size, and token usage from markdown table rows.

100% free
Private in browser
No signup
No watermarks

Markdown table

JSON shape

Indent spaces

Options

JSON · 3 rows · 3 cols

[
  {
    "Name": "Alice",
    "Role": "Admin",
    "Active": true
  },
  {
    "Name": "Bob",
    "Role": "Editor",
    "Active": false
  },
  {
    "Name": "Priya",
    "Role": "Viewer",
    "Active": true
  }
]

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About Markdown Table to JSON Array Sizer

Calculate JSON object count, payload size, and token usage from markdown table rows. Enter Data Rows and Table Columns and the tool works out JSON Array Object Count and Estimated LLM Token Count straight away. Everything runs in your browser, so your data never leaves your device.

How to use Markdown Table to JSON Array Sizer

Enter Data Rows and Table Columns.
Change any value to see the result update instantly.
Read JSON Array Object Count and Estimated LLM Token Count in the results panel — copy or download what you need.

Key features

Shows JSON Array Object Count
Shows Estimated LLM Token Count (~4 chars/tok)
2 adjustable inputs, results update as you type
No signup, no limits
Runs entirely in your browser — nothing is uploaded

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Markdown Table to JSON Array Sizer give me?: It works out JSON Array Object Count and Estimated LLM Token Count, updating live as you change the inputs.
What do I need to enter?: Just Data Rows and Table Columns. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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