Convert tools

JavaScript Formatter

Format JavaScript and JSX with Prettier without executing the code.

Convert in your browser · No sign-up

Uses the Babel parser, two-space indentation and an 80-column target. TypeScript syntax is outside this tool’s parser.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Format JavaScript and JSX with Prettier without executing the code.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

const x={a:1}; → const x = { a: 1 };

Details and limitations

Uses the Babel parser, two-space indentation and an 80-column target. TypeScript syntax is outside this tool’s parser.

Text stays in your browser; it is not sent to a conversion server.

FAQ

JavaScript Formatter — What are the supported inputs and limits?

Uses the Babel parser, two-space indentation and an 80-column target. TypeScript syntax is outside this tool’s parser.

Format references

Tool page updated: