Online FTL Formatter

A precise, fast formatter for FreeMarker templates that standardizes indentation, spaces, and line breaks to improve collaboration and reduce diffs.

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2,380+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Online FTL Formatter processes input data instantly inside your browser.

Sample Input Minified string: {"id":1,"status":"active","roles":["admin"]}

Computed Result

{
  "id": 1,
  "status": "active",
  "roles": [
    "admin"
  ]
}

Execution Mode Client-Side In-Browser JS

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About This Tool

Online FTL Formatter provides deterministic formatting for FreeMarker Template Language blocks. It ingests raw FTL text, normalizes indentation, wraps lines to a configurable width, and re-emits text using a stable, deterministic serializer. The tool preserves literal sections and comments, ensuring that runtime semantics are not altered. Output helps developers maintain readability and reduce diffs across version control, across teams, and in CI pipelines.

Under the hood, the formatter tokenizes FTL, builds a light parse tree for blocks, and applies rules to reindent nested blocks. Advanced options allow selecting target style canonical, compact, or expanded, adjusting indent_size, wrap_column, and comments handling. It does not evaluate templates or execute their expressions, preserving safety and determinism.

Beneficiaries include developers maintaining FreeMarker templates, content engineers migrating templates between environments, and teams enforcing style guides. Unique value lies in deterministic, FTL-aware formatting that can be integrated into pipelines and code reviews, providing safe diffs and stable templates.

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How to Use

Provide inputs: paste the raw FTL text into the input field.
Choose formatting style and options: select target_style (canonical, compact, expanded); set indent_size and wrap_column as needed.
Run formatting: the tool applies rules and displays the formatted output in real time.
Review outputs: verify alignment, comments, and block structure; adjust options if necessary.
Copy or export: copy the formatted text or integrate into your repository.

Frequently Asked Questions

Find Quick Answers

What is the Online FTL Formatter?

The tool formats FreeMarker Template Language (FTL) text by applying a deterministic set of whitespace and block rules without evaluating expressions. It improves readability, reduces diffs, and enforces team style without changing runtime behavior.

What inputs does it accept?

Accepts plain FTL text as input; supports literals, comments, and multi-line directives; encoding is UTF-8; can apply options like indentation and wrap width.

Can I export or download formatted text?

Yes; the formatter returns the formatted text which you can copy to clipboard or paste into files. It may offer a download option depending on host UI.

How are syntax errors handled?

If blocks are unbalanced or directives are malformed, the formatter reports errors with location data and formats valid regions where possible; runtime behavior remains unaffected.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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