lookup> .webapp

.WEBAPP·File Extension

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

Data & Textapplication/x-web-app-manifest+jsonCompressible

Quick facts

Extension.webapp

File typeWEBAPP Data & Text

MIME typeapplication/x-web-app-manifest+json

CategoryData & Text

Charset—

CompressibleYes

What is .webapp

What is a .webapp file?

A .webapp file is a WEBAPP 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 application/x-web-app-manifest+json, and it is marked as compressible. When serving .webapp over HTTP, set the Content-Type header as shown in Developer info below.

Related entities: it maps to application/x-web-app-manifest+json and is used by JSON among others — and is delivered over HTTP via the Content-Type header.

How to open .webapp files

Use VS Code or Notepad++ to open and edit .webapp 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: application/x-web-app-manifest+json

Common software that reads/writes .webapp:

VS CodeNotepad++Sublime Textjq

Relation chain

.webappextension of

format

WEBAPP Data & Textserved as

mime type

application/x-web-app-manifest+jsonsent via header

http header

Related extensions

Related MIME types

application/x-web-app-manifest+json

.webapp

Related programming languages

JSON

.json .4DForm .4DProject

Common uses

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

How to edit .webapp 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 .webapp files

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

Frequently asked questions

What programs can open .webapp 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 .webapp file?

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

What is the relationship between .webapp and the application/x-web-app-manifest+json MIME type?

application/x-web-app-manifest+json is the media type identifier used for .webapp files during network transfer (for example in the HTTP Content-Type header).

Sources & standards

Updated 2026-08-18

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