Prompt Template Builder
Build reusable prompt templates with variable placeholders. Fill in values and get a rendered prompt ready to copy and use with any AI model.
About Prompt Template Builder
Writing good prompts is part skill, part repetition. If you find yourself rewriting the same prompt structure over and over with slightly different details, a prompt template builder can save you real time. Write the template once, define your variables, and fill in the blanks whenever you need a fresh prompt.
How it works
Type or paste your prompt into the template editor using double curly braces for any values that change between uses - for example, {{topic}} or {{tone}}. The tool detects every unique placeholder and generates an input field for it. As you fill in values, the rendered preview updates in real time. Unfilled variables stay highlighted in amber so you can spot what's missing at a glance.
Starter templates and saving
Not sure where to start? Pick from five built-in templates covering blog writing, code review, email drafting, data analysis, and translation. Once you have a template you like, save it by name and it'll be stored in your browser for next time. You can build up a personal library of templates without creating an account.
Token estimates and copying
The stats bar shows character count and an estimated token count (characters divided by 4, a rough average for English text). This helps you stay within model context limits before you paste the prompt. When you're ready, hit the copy button and paste directly into ChatGPT, Claude, or any other AI tool.
Need to count characters or words more precisely? Try the character counter for exact totals. If you're doing bulk text replacements across your prompts, the find and replace tool can help.
This tool runs entirely in your browser - nothing is sent to a server.
Frequently Asked Questions
What is a prompt template?
A prompt template is a reusable text pattern with placeholder variables like {{topic}} or {{tone}}. You write the template once, then fill in different values each time to generate a new prompt. This saves time when you regularly use similar prompts with different details.
How do I add variables to my template?
Wrap any word in double curly braces, like {{variableName}}. The tool auto-detects these placeholders and creates input fields for each one. Variable names should use letters only, with camelCase for multi-word names (e.g., {{targetAudience}}).
How is the token count estimated?
The token estimate divides the total character count by 4, which is a rough average for English text with most language models. Actual token counts vary depending on the model and the specific text. For precise counts, use the tokenizer provided by your model's vendor.
Can I save templates for later?
Yes. Click "Save template" below the editor, give it a name, and it gets stored in your browser's local storage. Your saved templates appear as pills alongside the starter templates. They persist across sessions as long as you don't clear your browser data.
Does this tool send my prompts anywhere?
No. Everything runs entirely in your browser. Your templates, variable values, and rendered prompts never leave your device. Saved templates are stored in localStorage on your machine.