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.XFDF·File Extension

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

Data & Textapplication/xfdf

Quick facts

Extension.xfdf

File typeXFDF Data & Text

MIME typeapplication/xfdf

CategoryData & Text

Charset—

Compressible—

What is .xfdf

What is a .xfdf file?

A .xfdf file is a XFDF 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/xfdf. When serving .xfdf over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .xfdf files

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

Common software that reads/writes .xfdf:

VS CodeNotepad++Sublime Textjq

Relation chain

.xfdfextension of

format

XFDF Data & Textserved as

mime type

application/xfdfsent via header

http header

Related extensions

Related MIME types

application/vnd.adobe.xfdf

.xfdf

Common uses

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

How to edit .xfdf 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 .xfdf files

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

Frequently asked questions

What programs can open .xfdf 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 .xfdf file?

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

What is the relationship between .xfdf and the application/xfdf MIME type?

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

Sources & standards

Updated 2026-09-13

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