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Spintax Builder & Tester

Build spintax from alternative phrases or validate an existing template. Preview unique message combinations while leaving double-brace personalization tags intact.

No signupNo creditsLocal processing
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One option per line. Replaces the template when supplied.

How to use this tool

  1. Use one alternative per line to build a group, or paste existing spintax.
  2. Check syntax and review the variation count.
  3. Copy a template or export sampled combinations.

A worked example

Input

{Hi|Hello} {{first_name}}

Output

Hi {{first_name}}
Hello {{first_name}}

Single braces generate phrase alternatives. Double braces are reserved for recipient personalization and remain intact.

What the result means

Review the variations for complete sentences and consistent meaning. Double-brace personalization stays unchanged, so preview it separately against recipient data.

Up to five nesting levels and 50 previews per run. Variation does not guarantee filter avoidance or make an irrelevant message useful.

Frequently asked questions

How are spintax and mail merge different?

Spintax chooses among wording alternatives such as {Hi|Hello}. Mail merge fills a recipient-specific field such as {{first_name}}. This tool preserves double-brace tags for a later merge step.

Why are only 50 variations displayed?

Nested alternatives can create a very large number of combinations. The tool caps previews at 50 and reports the modeled combination count, so it does not try to expand every possible message in memory.

Is this free, and are my inputs uploaded?

Use this tool without an account, subscription or credits. Processing and file exports run in your browser; the tool does not upload your inputs or send emails. Clear inputs to remove the current data. Inputs are not saved when you reload the page.

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