How to use this developer tool
- Paste or upload TypeScript.
- Select indentation style.
- Set the maximum consecutive blank lines.
- Run the formatter and compare the output.
#115 · Programming Language Developer Tool
TypeScript Formatter
Format TypeScript with configurable indentation, semicolon handling, blank-line cleanup, trailing-space removal, and conservative token-aware processing in your browser.
Developer Input
Browser-based source processinglines
Ad space
What this developer tool does
The formatter applies conservative indentation and whitespace normalization while preserving strings, comments, template literals, and code content.
Token-aware scan → whitespace normalization → brace-based indentation → optional semicolon pass → final newline.
This lightweight formatter is intentionally conservative and is not a full replacement for Prettier.
Example
Input:
interface User{name:string;age?:number}
const x=(a:number)=>{return a+1}Expected use: Run the selected mode and review the generated output and statistics.Tips for better output
- Preserve comments when documentation matters.
- Review semicolon changes in ASI-sensitive code.
- TSX is formatted conservatively.
- Keep the original source before replacing project files.
FAQ
How can I format TypeScript code online?
Paste the source, choose an indentation style, and run the formatter.
How do I change TypeScript indentation to two spaces?
Select 2 spaces and format the code.
How can I remove trailing spaces from TypeScript?
Enable Remove trailing spaces before formatting.
How do I format TypeScript without installing Prettier?
Use this browser-based formatter for conservative whitespace and indentation cleanup.
How can I compare TypeScript before and after formatting?
The output and statistics show the formatted result while preserving the original input.
Related developer tools
Supported analysis and output
| Module | Purpose |
|---|---|
| Input | Local browser processing |
| Analysis | Tool-specific lexical and structural logic |
| Output | Copy and download ready |
| Privacy | No upload or server execution |