.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 2026-08-18