AI Prompt Character Counter
Paste any AI prompt below to see a live character, word, line and estimated token count, plus guidance calibrated to the AI model you're targeting.
How the Prompt Character Counter works
Paste your prompt
Type or paste your AI prompt into the box — nothing is uploaded, it all stays in your browser.
Pick your AI model
Switch the profile tab to ChatGPT, Claude, Gemini, Midjourney, Stable Diffusion, FLUX or Sora for model-specific guidance.
Copy or share when ready
Copy your prompt to the clipboard or share it directly once the length and guidance look right.
About this tool
Every major AI platform — ChatGPT, Claude, Gemini, Midjourney, Stable Diffusion, FLUX and Sora — measures your input differently. Some count characters, most actually count tokens (small chunks of text, roughly 4 characters each in English), and image/video generators like Midjourney enforce their own hard character caps and soft word limits.
This tool gives you one live counter that adapts to whichever model you're writing for: switch the profile tab above the box and the guidance panel instantly updates with that model's real limits and practical recommendations, sourced from each platform's current documentation.
Because everything runs locally in your browser, your prompt is never uploaded anywhere — useful if you're drafting something you'd rather not send to a third-party server before you're ready to use it.
Frequently asked questions
How many characters is one AI token?
In English, one token is roughly 4 characters or about 0.75 of a word. This tool's token estimate blends both a character-based and word-based calculation for a closer approximation.
Is this tool free to use?
Yes, completely free, with no sign-up, no watermark and no limit on how many prompts you check.
Does my prompt get uploaded anywhere?
No. All counting happens locally in your browser using JavaScript — your prompt text is never sent to any server.
Why do character limits differ between ChatGPT, Claude and Midjourney?
Each platform uses a different underlying tokenizer and has its own product-level input limits (chat message size, custom instruction fields, or hard prompt caps for image generators), so the practical limit you'll hit varies by tool.
Will my draft be saved if I close the tab?
Yes, your prompt automatically saves to your browser's local storage as you type, so it's still there next time you open this page on the same device.
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