LLM Token Counter

Estimate LLM token counts in real time. GPT-4/Claude/Gemini with API cost approximation.

Data is never sent to the server. Everything runs locally in your browser. Safe for sensitive information.

About this tool

Estimate the token count of your text for GPT-4, Claude, and Gemini in real time. See approximate API costs per model.

How many tokens will this prompt cost? Paste your text to get instant estimates for GPT-4, Claude, and Gemini, along with approximate API costs. Perfect for optimizing prompts, checking context window limits, and budgeting API usage.

Tool interface

Characters
0
Words
0
Lines
0
Est. tokens
0
Model Est. tokens Input cost (est.)

Token count is a character-based estimate. Actual count depends on the model's tokenizer. Prices are as of 2025.

Usage

  1. Paste or type text
  2. See real-time character/word/token counts
  3. Check per-model API cost estimates

When to use

API cost estimation, prompt optimization, context window checks.

Examples

100 Japanese chars ≈ 50-70 tokens, 100 English words ≈ 130 tokens.

FAQ

How accurate is the estimate?

This uses character-based heuristics. For exact counts, use model-specific tokenizers like tiktoken.

What is a token?

The smallest unit LLMs process. English words are 1-3 tokens; Japanese characters are 1-2 tokens each.

Keywords covered on this page

LLM Token Counter is a free developer tool for searches like token, ChatGPT, LLM, API, cost, prompt. Estimate LLM token counts in real time. GPT-4/Claude/Gemini with API cost approximation.

Basic workflow

  1. Paste or type text
  2. See real-time character/word/token counts
  3. Check per-model API cost estimates

Practical use cases

  • API cost estimation, prompt optimization, context window checks.
  • Estimate the token count of your text for GPT-4, Claude, and Gemini in real time. See approximate API costs per model.
  • Real-time token estimation
  • Multi-model support

Privacy & data handling

Input is processed locally in your browser—nothing is sent to our servers.

Things to watch out for

  • Always double-check before pasting output into production
  • Try incognito if extensions break the page
  • Wait for processing on large inputs

Related learning content

Frequently asked questions

Is LLM Token Counter free?

Free to use, no sign-up required.

Is data sent to a server?

Input is processed locally in your browser—nothing is sent to our servers.

Supported browsers?

Tested on recent Chrome, Edge, Firefox, and Safari.

Offline use?

Core features work offline after the first load.

vs CLI or desktop apps?

LLM Token Counter is an install-free online alternative to CLI or desktop apps.

When to use it?

Use it when: API cost estimation, prompt optimization, context window checks.

Usage example?

Example: 100 Japanese chars ≈ 50-70 tokens, 100 English words ≈ 130 tokens.

Main features?

Real-time token estimation, Multi-model support, API cost approximation, Fully local

How is this different from similar tools?

LLM Token Counter runs in the browser with no install—ideal for quick checks before heavier CLI or IDE workflows.

Search keywords

token, ChatGPT, LLM, API, cost, prompt

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