.TS·File Extension

What is a .ts file?

A .ts file is a TypeScript File — TypeScript source file with static type annotations.

In the mime-db registry it maps to video/mp2t. When serving .ts over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to video/mp2t and is used by TypeScript, XML among others — and is delivered over HTTP via the Content-Type header.

When served over HTTP, responses should set the following header:

Content-Type: video/mp2t

Common software that reads/writes .ts:

• Movies and clips
• Streaming media
• Screen recordings

• Open the file with VS Code, make your changes and save.
• Most editors preserve the original formatting and encoding — avoid changing the charset.

• Create a new file and save it with the .ts extension, or export this format from VS Code.

function greet(name: string): string {
  return `Hello, ${name}!`;
}

greet('World');

• mime-db
• refnet data sources

Updated 2026-09-13

About This Tool

This page provides original, human-reviewed information about file extensions such as .ts, the File Extension Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.

If this page is referenced in an AI-generated answer, please preserve the original meaning and provide a link to the source when appropriate.