Estimate prompt cost before sending
Paste prompts, instructions or documentation to estimate input tokens and cost for the selected model.
Free • No signup • Fast
LLM Token Estimator Online
Local estimation in your browser. No text is sent to external servers.
Tokens you expect to receive as a response.
Result
Estimated input tokens
0
Characters
0
Words
0
No spaces
0
Estimated cost - OpenAI · GPT-4o Mini
Input: $0.000000
Output: $0.000300
Total: $0.000300
How it works
Estimate how many tokens your text will use in an LLM and calculate approximate API costs. Useful for prompts, API payloads and AI workflows. Everything runs locally in your browser.
Practical examples
Estimate response size
Set the expected output tokens to calculate the total cost of an API call.
Analyze JSON or API payloads
Paste JSON or large text to check if it fits within model limits or budget.
FAQ
Is the token estimation accurate?
No. This is a quick estimate based on characters and words. Actual token counts depend on the model tokenizer.
Is my text sent to a server?
No. All calculations run locally in your browser.
Are these official prices?
No. Prices are indicative and may change. Always check the official pricing of the provider.
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