lookup> .ttl

.TTL·File Extension

TTL Data & Text — A .ttl file is a TTL Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

Data & Texttext/turtleUTF-8

Quick facts

Extension.ttl

File typeTTL Data & Text

MIME typetext/turtle

CategoryData & Text

CharsetUTF-8

Compressible—

What is .ttl

What is a .ttl file?

A .ttl file is a TTL Data & Text. It is a text-based data format widely used for configuration files, data interchange and API payloads.

In the mime-db registry it maps to text/turtle with UTF-8 encoding. When serving .ttl over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to text/turtle and is used by Turtle among others — and is delivered over HTTP via the Content-Type header.

How to open .ttl files

Use VS Code or Notepad++ to open and edit .ttl files.
Any text editor (Notepad, VS Code) can inspect the raw content as text.

Developer info

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

Content-Type: text/turtle; charset=utf-8

Common software that reads/writes .ttl:

VS CodeNotepad++Sublime Textjq

Relation chain

.ttlextension of

format

TTL Data & Textserved as

mime type

text/turtlesent via header

http header

Related extensions

Related MIME types

Related programming languages

Turtle

.ttl

Common uses

Configuration files
Data interchange between systems
API request and response payloads
Logs and data exports

How to edit .ttl files

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

How to create .ttl files

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

Frequently asked questions

What programs can open .ttl files?

Common options include VS Code, Notepad++, Sublime Text. You can also open many of these files with built-in viewers or a browser.

How do I create a .ttl file?

Create a new file in any text editor or the app that owns the format and save it with the .ttl extension.

What is the relationship between .ttl and the text/turtle MIME type?

text/turtle is the media type identifier used for .ttl files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-08-18

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