JSON Token Counter
Estimate tokens and cost for JSON payloads.
Results update automatically as you type.
Result
0 tokens (estimated)
0 words · 0 characters
- Estimated tokens
- 0
- Words
- 0
- Characters
- 0
- Input cost at this model(GPT-5)
- $0.0000
Estimate how many tokens a JSON payload uses and what it costs as model input. JSON is token-dense because of keys, quotes and punctuation, so budgeting it separately avoids surprises.
How this is calculated
This calculator uses the developer tools formulas described in our methodology. All figures are estimates for planning; verify current pricing with each provider before relying on them.
Worked example (defaults)
With the default inputs above, here is the result:
Result
0 tokens (estimated)
0 words · 0 characters
- Estimated tokens
- 0
- Words
- 0
- Characters
- 0
- Input cost at this model(GPT-5)
- $0.0000
Frequently asked questions
Why does JSON use more tokens?+
Braces, quotes, commas and repeated keys all become tokens, so structured JSON is denser than plain prose of the same length.