Format and beautify JavaScript code with configurable indentation, semicolons, and bracket style options.
Paste JavaScript into this formatter to replace cramped or inconsistent layout with a readable, repeatable style. It adjusts whitespace, indentation, line breaks, semicolon presentation, and bracket placement according to the selected controls while leaving identifiers and expressions recognizable. The main surprise is that cleaner output is not evidence that the program is correct. Formatting can expose structure, but it does not establish that the source is valid, free of logic errors, or compatible with a particular runtime.
A concrete input and expected output from the current implementation.
Input
if(ready){start();} Expected output
if (ready) {
start();
} With two-space indentation, semicolons retained, and the opening bracket kept on the statement line, the block becomes three lines. Spaces are added around the condition and before the opening bracket.
The formatter treats the submitted text as JavaScript and rewrites its visible layout. Nested function bodies, conditional blocks, loops, object expressions, and similar structures receive consistent indentation and line breaks. Compact token sequences such as `if(ready)` are spaced into a conventional readable form. The indentation selection determines how far each nested level moves from its parent.
Semicolon and bracket settings control two choices that indentation alone cannot express. The semicolon option determines whether statement endings are displayed with the selected convention. Bracket style determines where applicable opening and closing brackets appear relative to their surrounding statement or block. These settings affect the generated text, so choose values that agree with the destination project's existing conventions.
The purpose is to change presentation, not program behavior, and ordinary whitespace or indentation changes do not alter most JavaScript expressions. The answer is not an unconditional no, however. Semicolon changes can interact with automatic semicolon insertion, and comments or unusual line-sensitive constructs merit inspection. Review and test the returned source before replacing working code.
No. It is useful for producing readable JavaScript with the indentation, semicolon, and bracket choices exposed by this page. A linter can report suspicious constructs and enforce additional rules, while a project formatter may follow a checked-in configuration covering many more decisions. Use this tool for the displayed transformation, not as proof of repository compliance.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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