lookup> .shtml

.SHTML·File Extension

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

Data & Texttext/htmlCompressible

Quick facts

Extension.shtml

File typeSHTML Data & Text

MIME typetext/html

CategoryData & Text

Charset—

CompressibleYes

What is .shtml

What is a .shtml file?

A .shtml file is a SHTML 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/html, and it is marked as compressible. When serving .shtml over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to text/html — and is delivered over HTTP via the Content-Type header.

How to open .shtml files

Use VS Code or Notepad++ to open and edit .shtml 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/html

Common software that reads/writes .shtml:

VS CodeNotepad++Sublime Textjq

Relation chain

.shtmlextension of

format

SHTML Data & Textserved as

mime type

text/htmlsent via header

http header

Related extensions

Related MIME types

Common uses

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

How to edit .shtml 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 .shtml files

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

Frequently asked questions

What programs can open .shtml 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 .shtml file?

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

What is the relationship between .shtml and the text/html MIME type?

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

Sources & standards

Updated 2026-09-13

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