free_tool
Prompt Template Builder
Write a prompt once, mark the parts that change with {{variables}}, fill in the blanks, and copy the finished prompt for ChatGPT, Claude or Gemini. Stop rewriting the same prompt with different details every time. It runs in your browser.
Wrap any changing part in {{double braces}} to turn it into a fill-in field.
Variables · 0/5 filled
Result
Write a {{tone}} cold email to a {{role}} at a {{industry}} company about {{product}}. Keep it under {{word_count}} words.Runs entirely in your browser. Nothing is sent anywhere.
Reusing the same templates every day? Prompt Vault is my free Chrome extension that saves your templates and inserts them straight into ChatGPT, Claude, or Gemini — it asks for the variables and fills them for you, no copy-paste.
Get Prompt Vault — free →why_templates
Save the shape of a prompt, not the string
Most prompts you reuse aren't fixed text — they're a pattern with a blank in it: "Summarize this {{document}} for a {{audience}}." Retyping and hand-editing those blanks every time is slow and drifts the parts that made the prompt good in the first place.
A template fixes the instructions and only moves the inputs. Put the stable wording first and the variables last — it reads cleaner, and it also helps providers cache the stable prefix, which cuts cost on long prompts. Name variables for what they are ({{audience}}, not {{x}}) so the template stays readable a month later.
faq
Questions & answers
- What is a prompt template?
- A prompt template is a prompt with the changing parts marked as variables, like {{topic}} or {{audience}}. The fixed instructions stay the same and you only swap the variables, so one template covers many situations instead of rewriting the prompt each time.
- How do variables work in this tool?
- Wrap any changing part of your prompt in double braces, for example {{role}}. The tool detects each variable and gives you a field to fill in. As you type, it builds the finished prompt, and any blank you leave stays as {{variable}} so you can spot it.
- Is my prompt sent to a server?
- No. Everything runs in your browser with plain JavaScript. Your template and the values you enter never leave the page.
- Where should I put the variables in a prompt?
- Put the stable instructions first and the variable inputs last. It keeps the template readable and lets AI providers cache the stable prefix, which lowers cost on long prompts. Name variables for what they are ({{audience}}, not {{x}}).
- Can I reuse these templates directly in ChatGPT or Claude?
- Yes — copy the finished prompt and paste it. To skip the copy-paste, Prompt Vault (a free Chrome extension) saves templates and inserts them into ChatGPT, Claude, or Gemini in one click, prompting you for the variables automatically.
Building on top of LLMs?
Prompt structure, caching, and cost add up fast once you're in production. I help teams ship LLM features that are reliable and don't blow the budget. Book a call, or leave your email.
Prefer proof first? See how this plays out in real case studies →