Live
Token counter
Count the tokens in a piece of text for the model you are about to send it to.
Runs in your browser
Tools
Four tools, each answering one question that comes up while using these services. Three run entirely in the page; the prompt improver sends your text to a model, and its page says so.
Live
Cost estimator
Turn a token count and a model choice into a monthly bill.
Runs in your browser
Planned
Prompt improver
Rewrite a prompt against a checklist of what the model actually needs.
Sends your prompt to a model
Planned
Chat export viewer
Open a ChatGPT or Claude export file and read it like a document.
Runs in your browser
What "runs in your browser" means
The site is a set of static files. There is no account, no database and no request logging. A tool that says it runs in your browser does its work in the page: the text you paste stays in the tab and disappears when you close it.
One of the four needs help from a server, and its page says so plainly: the prompt improver has to send your text to a model to do the work. The other three do their work in the page and keep working with the network switched off once it has loaded.
The cost estimator reads the same API price table published on this site, so a price it quotes carries the same date and the same source as the table.