Last updated: March 2026
Prompt Tokenizer is a browser-based tool that estimates token counts and costs for AI model prompts. The free tier provides unlimited single-prompt analysis. The Pro tier ($9 one-time) unlocks batch analysis, export, and optimization features.
Token counts are estimates based on approximation algorithms (~4 characters per token). Actual token counts may vary by 5-10% depending on the model's tokenizer. Cost figures are based on published API pricing and may not reflect negotiated or volume discounts.
Pro is a one-time purchase of $9 USD processed through Stripe. As the tool is delivered instantly upon payment, all sales are final. If you experience a technical issue preventing access, contact us and we will resolve it or issue a refund.
All prompt analysis happens client-side. We never transmit, store, or have access to the text you enter. See our Privacy Policy for full details.
Prompt Tokenizer is provided "as is" without warranty. We are not liable for any decisions made based on the cost estimates provided by this tool.
Questions? Reach out at avi@ultradeep.tech.