Web Tools
Text Template Engine
Render text templates with {{variable}} interpolation. Define variables with values and defaults, auto-detect placeholders, customize delimiters, control case sensitivity and whitespace trimming. Track resolved and unresolved variables. Runs entirely in your browser — your data never leaves your machine.
template text interpolation variables generator
Published May 31, 2026
All interactive tools run entirely in your browser. Your data never leaves your device.
How It Works
Write a template with {{variable}} placeholders, define variable values, and see the rendered output instantly. The tool auto-detects variables in your template and tracks which are resolved or unresolved. Customize delimiters, case sensitivity, and whitespace handling.
Features
- Variable interpolation:
{{name}}placeholder syntax with instant rendering - Auto-detection: automatically finds all variables in your template
- Default values: fallback values when variables are empty
- Custom delimiters: use
<% %>,${ },[[ ]], or any delimiter pair - Case sensitivity: optional case-insensitive variable matching
- Trim values: strip whitespace from variable values
- Preserve unknown: keep or remove unresolved placeholders
- Resolution tracking: count and list resolved vs unresolved variables
- 5 examples: email template, SQL query, config file, API request, commit message
- Private: all computation runs in your browser — no data transmitted
Use Cases
- Previewing email or notification templates before sending
- Building parameterized SQL queries or API requests
- Generating config files from templates
- Testing template syntax for various template engines
- Creating reusable text snippets with variable parts