What variables can I use in a prompt template?

Use topic, audience, tone, style, output and length, or add up to 20 custom variables inside double curly braces.

Does the prompt leave my browser?

No. Template filling happens locally in your browser.

Yes. The share button creates a URL containing the template and current values.

Reusable prompt tool

Write a reusable template once, then fill topic, audience, tone, style, output and length to create a complete AI prompt. Custom variables work too.

Everything runs in your browser. Use double curly braces for each variable.

Template preset

Prompt templateExample variable: {{topic}}. Up to 20 unique variables are supported.

Filled prompt

Ready.

What variables can I use?

Start with topic, audience, tone, style, output and length. You can also add any custom name inside double curly braces, such as {{platform}}.

Is my prompt private?

Yes. Filling and sharing are handled locally in your browser; FastUtils does not upload the prompt.

How does the share link work?

The link stores the template and current variable values in the URL after the # symbol, so you can reopen or share the exact setup.