Free token counters that run in your browser.
Paste a prompt or a model reply and watch tokens, words, and characters update as you type. Built for context limits and API length checks - not for another signup wall.
Popular tools
What a token counter is for
Large language models do not bill or truncate by page count. They split text into tokens - pieces that may be a word, part of a word, punctuation, or a code fragment. Two prompts that look similar in an editor can differ a lot once tokenized, especially with code, mixed languages, or dense punctuation.
A browser token counter helps you check length before you hit a context window, truncate a ChatGPT paste, or spend budget on an oversized API request. LLM TokenBase keeps that check local: paste text, pick a mode, read tokens, words, and characters.
When people use these tools
Prompt and completion sizing
Estimate how long a system prompt, few-shot block, or model reply is before you send it or store it in a pipeline.
Context window planning
See whether a long paste is already eating most of a window, so you can trim before the model refuses or silently drops earlier turns.
Rough cost awareness
Use token counts as a planning input for API spend. Exact invoices still come from the provider; this page is for decisions before you ship.
Why TokenBase
Runs locally
Counts are computed on your device. Close the tab and the pasted draft is gone - the page never needed that text on a server.
Model modes
Switch GPT-style, Claude, or Gemini modes when the difference matters. If a mode cannot be exact in a static page, we label it approximate.
No account required
Open a page, paste, read the number. No login wall, workspace setup, or email gate before a length check.