ToolsDeveloper & Data

Private developer & data tool

JavaScript Formatter

Parse and reprint JavaScript with Prettier's Babel parser, configurable line width, indentation, quotes, and semicolons.

Free to use Your source stays in this browser and is never uploaded to Lucaden by this tool.

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How it works

Complete the job in three clear steps

  1. Add source code or markup to the local workspace.
  2. Choose the relevant settings and create consistently formatted source.
  3. Review the result carefully, then copy or download it before leaving the page.

Important

Check the result before relying on it

Review generated output before using it in production. Formatters and converters can validate structure, but they cannot understand every application-specific rule or guarantee that transformed content has the intended meaning.

Practical details

What this Lucaden tool does

Parse and reprint JavaScript with Prettier's Babel parser, configurable line width, indentation, quotes, and semicolons.

Formatting is not linting or type checking. Run the result in the intended application and review any syntax error reported by the parser.

Lucaden supplies the interface and focused workflow while preserving upstream attribution and license notices.

Included capabilities

  • Babel-based JavaScript parsing
  • Configurable print width
  • Quote and semicolon controls
  • Downloadable JS output

Useful for

  • Normalize pasted JavaScript
  • Review minified snippets
  • Prepare code examples
  • Standardize browser scripts

Questions

About this tool

Does Lucaden upload my source?

No. The pinned open-source runtime executes in temporary browser memory, and this tool has no upload step.

What should I verify?

Formatting is not linting or type checking. Run the result in the intended application and review any syntax error reported by the parser.

Which open-source project powers this tool?

The implementation uses Prettier (MIT runtime 3.9.6). Upstream projects retain their original names, copyrights, and licenses.

Open-source foundations

Built transparently

Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.