AI Token Counter
About AI Token Counter
Instantly count tokens in your text for the most popular OpenAI models including GPT-4, GPT-4o, and GPT-3.5-turbo. See token count, word count, character count, and estimated API cost per 1M tokens. Essential for anyone building LLM applications.
How To Use
- Paste or type your text into the input area of AI Token Counter.
- Choose the matching option — compare, find and replace, convert case, count, or generate — and AI Token Counter updates the output instantly.
- Copy the result to your clipboard, or use the export option if you need to download it.
Example
Input: Two paragraphs or a block of pasted text.
Output: The processed result — a diff, a word count, converted case, or generated filler — ready to copy.
Who Uses AI Token Counter
- Writers, editors, and students who need private text tools that never leave the browser.
- Content creators and developers who want instant, no-upload processing for counts, diffs, converters, and generators.
- Anyone who values private — files and text stay on your device and are never uploaded to a server.
Frequently Asked Questions
What is a token in AI models?
A token is a chunk of text — roughly 4 characters or ¾ of a word on average in English. OpenAI's API charges per token, so knowing your token count helps you estimate costs.
Is this exact?
Token counts use a close approximation of the GPT tokenizer (BPE). For exact counts in production use tiktoken directly in your code.
Why do different models have different token counts?
GPT-4o uses a newer tokenizer (o200k_base) that is slightly more efficient than the cl100k_base used by GPT-4/3.5, resulting in slightly fewer tokens for the same text.