TypeScript Interface Formatter
Format and clean up TypeScript interface declarations.
JSON to Language Struct / Class Generator
About TypeScript Interface Formatter
The TypeScript Interface Formatter & Prettifier reorganizes `.ts` interface declarations, sorting properties alphabetically, standardizing indentation, aligning colons, and enforcing consistent semicolon delimiters.
How to Use TypeScript Interface Formatter
Step 1
Paste your unformatted TypeScript interface.
Step 2
Select sorting and delimiter preferences.
Step 3
Review the cleaned TypeScript code.
Step 4
Click "Copy Formatted Code".
Practical Use Cases for TypeScript Interface Formatter
Standardizing Team TypeScript Interface Definitions
Clean up and prettify messy TypeScript interfaces with consistent indentation, trailing semicolons, and sorted keys for clean Git diffs.
Alphabetizing Large Domain Model Properties
Sort dozens of interface properties alphabetically to make finding fields faster in large enterprise codebases.
Input & Output Examples
Formatting and Sorting Interface
`interface Profile{z:number; a:string,b?:boolean}``interface Profile {\n a: string;\n b?: boolean;\n z: number;\n}`Key Features & Performance
- ✓Formatting rules: Alphabetize keys (A-Z), align property colons, standardize indentation (2 or 4 spaces).
- ✓Delimiter style: Semicolons (`;`), Commas (`,`), or None.
- ✓Preserves JSDoc comments (`/** ... */`) attached to individual interface properties.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy formatted interface.
Key Terminology & Definitions
TypeScript Interface
A syntactic contract defining the shape of an object in TypeScript, supporting inheritance via `extends` and declaration merging.
JSDoc Annotation
A standard comment block format used to document parameters, return types, and descriptions for code symbols.