Utility

Prompt Length Checker

Q: How are tokens estimated?

Tokens are estimated at approximately 4 characters per token for English text. Actual tokenization varies by model.

Q: What model context windows are shown?

GPT-4 (128K tokens), Claude (200K tokens), and Gemini (1M tokens) context window limits.

Q: Does this use AI?

The length analysis is instant and local. The optimization suggestions use AI (Gemini 2.0 Flash) via streaming for real-time tips.

Q: Is my prompt data stored?

No. Text analysis happens in your session. AI suggestions are processed via OpenRouter and not stored.

Analyze your AI prompts in real-time. Check token counts, see how much of each model's context window you're using, and get AI-powered suggestions to optimize your prompt length.

Your Prompt

Est. Tokens 0

Words 0

Characters 0

Lines 0

memory Context Window Usage

help Frequently Asked Questions

info

How to use

Paste your prompt to see token counts, model limits, and get AI-powered optimization tips.

Token estimate: ~4 chars per token.

check_circle Real-time token & character counts
check_circle GPT-4, Claude & Gemini limit bars
check_circle AI-powered optimization suggestions

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Prompt Length Checker

help Frequently Asked Questions

How are tokens estimated? expand_more

What model context windows are shown? expand_more

Does this use AI? expand_more

Is my prompt data stored? expand_more

How to use

More Tools