Gemini Character Counter
Check your Gemini prompt length with a live character, word and estimated token count, calibrated to Gemini's web app limits.
How the Gemini 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
Google's Gemini models support enormous context windows at the API level, but the Gemini web app you use day-to-day has a much smaller practical limit per message — commonly cited around 30,000 characters, after which you'll see a “message too long” error.
This tool flags that threshold live so you know before you hit send whether a long paste needs to be trimmed or split into multiple messages.
If you're building against the Gemini API directly rather than the consumer web app, your effective limit is much higher and governed by the specific model's documented context window instead.
Frequently asked questions
What is Gemini's character limit in the chat app?
The Gemini web app has a practical functional limit around 30,000 characters per message; some accounts may see a smaller effective limit.
Is Gemini's API limit different from the web app?
Yes, the Gemini API supports much larger context windows on capable models than the consumer web interface's per-message cap.
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