Guide · 5 min
Private AI Token Counter: Count Tokens Without Uploading Prompts
Why browser-local token estimates matter for secret prompts, and how Fluxkit AI Lab compares GPT/Claude/Gemini counts privately.
Prompts can contain secrets
Customer names, API keys in examples, unreleased product copy, and internal strategy often live inside drafts. Pasting that text into a random online counter means you trust that site’s logs, CDN, and ads stack.
Fluxkit’s token tools are designed to run in your browser. Estimates happen locally so you can check size without sending the draft to Fluxkit for tokenization.
Privacy plus a workflow
A private single text box is good. A private workspace is better: draft with templates, compare families, forecast cost, keep local history, and share via #prompt= hash links that decode on the recipient’s device.
That combination is the differentiation versus clone “token counter” pages that only expose one number.
- Use AI Lab for full drafts; use the focused token counter when you only need one estimate.
- Treat browser estimates as planning — vendor dashboards remain billing truth.
- Clear local history on shared machines if drafts are sensitive.
FAQ
Does Fluxkit store my prompt on a server?
Token and cost estimates are computed in the browser. Hash share links put the draft in the URL fragment, which browsers do not send to the server on navigation.
Is offline counting exact?
It is an approximation for planning. For invoice-grade counts, use the provider’s tokenizer.