A Mustache formatter restructures Mustache template files with consistent HTML indentation and proper section block nesting. Mustache is a logic-less template language used across many languages and frameworks — this formatter handles all Mustache expressions including {{#section}} blocks, {{^inverted}} sections, partials, and variable interpolation.
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How to Use the Mustache Formatter
Mustache is a logic-less template syntax used in JavaScript, Ruby, Python, Java, and dozens of other languages. Its simplicity makes it popular for email templates, static pages, and cross-language template sharing. A Mustache formatter restores clean indentation to templates that have been minified, auto-generated, or inconsistently edited.
Step 1: Paste Your Template
Copy your .mustache or .html Mustache template file into the input area. The formatter accepts full page templates or partial template fragments.
Step 2: Choose Indentation
Select 2 spaces, 4 spaces, or tabs. Click Format Mustache to apply. Section opening tags {{#section}} and inverted sections {{^inverted}} increase indentation; closing tags {{/section}} decrease it.
Step 3: Understand Mustache Sections
Mustache sections serve two purposes: when the value is a list, the section renders once per item. When the value is truthy, it renders the block once. Inverted sections {{^empty}} render only when the value is falsy — useful for empty-state messages. Partials {{> partialName}} are placed on their own line with current indentation depth.
Mustache Template Best Practices
Keep Mustache templates truly logic-less — avoid complex data transformations. Prepare all data in your application code and pass clean, render-ready values to your template. Use {{{triple braces}}} only for content you explicitly trust, as it outputs unescaped HTML. Structure deeply nested templates as smaller partials for easier maintenance and reuse.
FAQ
Is the Mustache formatter free?
Yes, completely free with no signup required. Format unlimited Mustache templates in your browser.
Is my template code safe?
Yes. All formatting runs locally in your browser. Your Mustache templates are never sent to any server.
What Mustache syntax does this formatter handle?
All standard Mustache tags: {{#section}} opening sections (increase indentation), {{/section}} closing sections (decrease indentation), {{^section}} inverted sections, {{variable}} inline variables, {{{unescaped}}} unescaped output, {{> partial}} partials, and {{! comment}} comment tags.
What is the difference between Mustache and Handlebars?
Mustache is a logic-less template specification with no helper functions — only sections, variables, and partials. Handlebars extends Mustache with block helpers like {{#each}} and {{#if}}. The Mustache formatter focuses on core Mustache syntax without Handlebars extensions.
Can I use this with Mustache.js or other Mustache libraries?
Yes. The formatter works with any Mustache-compatible template regardless of which library renders it — Mustache.js, mustache Ruby gem, mustache Python, or any other implementation.
Can I minify Mustache templates?
Yes. The Minify button collapses whitespace while preserving all Mustache tags and HTML structure, useful for reducing template file size.