All tools

Prompt Template Variable Extractor

AI / Agent

Extract {{variable}}-style placeholders from a prompt template, flag duplicates, and cross-check against a list of variables your code actually provides

Paste a prompt template that uses {{variable}}-style placeholders and get back every variable name it contains, how many times each one appears, and which ones show up more than once. Pass in the list of variable names your code actually provides and it cross-checks the two: variables the template expects but you never supplied, and names you supplied that the template never uses. It's a quick pre-flight check for template-based prompt pipelines, LangChain, custom string templates, PromptLayer, before a missing variable turns into a runtime KeyError.

agentprompttemplatevariablesllm-pipeline

How to use Prompt Template Variable Extractor

  • 1.Paste the prompt template text containing one or more {{variable}} placeholders.
  • 2.Optionally list the variable names your code already provides, to cross-check them against the template.
  • 3.Check the duplicates list for variables used more than once, and missing/unused for anything that doesn't line up with what you provided.

Frequently asked questions

What placeholder syntax does this recognize?
Only double-curly {{name}} syntax, including dotted or dashed names like {{user.name}}. Single-brace, triple-brace Handlebars-style {{{name}}}, and Jinja {% %} tags aren't recognized.
Do I have to pass providedVars?
No, it's optional. Without it you just get the variable list, counts, and duplicates; passing providedVars adds the missing/unused cross-check.
Does this call an LLM to figure out the variables?
No, it's a plain regex scan over the template text. Nothing is sent anywhere.
Does it validate the variable values themselves?
No, it only extracts variable names from the template text. It doesn't know or check what values your code will substitute in.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/prompt-template-variable-extractor \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"template":"Hello {{name}}, your order {{order_id}} ships on {{ship_date}}.","providedVars":["name","order_id"]}'

Get an API key from your dashboard · Full API docs →

Related tools

Agent Retry / Backoff Schedule CalculatorCompute the full sequence of delays an exponential-backoff retry policy would actually produce, with optional capping and jitter, plus the total best- and worst-case wait.AI / AgentCompress JSONRemove nulls, empty arrays, empty objects from JSON to reduce token footprint before sending to an LLM.AI / AgentExtract EntitiesDetect emails, phones, dates, IPs, credit cards, IBANs, currencies, hashtags, and mentions from text.AI / Agent