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.QFX·File Extension

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

Data & Textapplication/vnd.intu.qfx

Quick facts

Extension.qfx

File typeQFX Data & Text

MIME typeapplication/vnd.intu.qfx

CategoryData & Text

Charset—

Compressible—

What is .qfx

What is a .qfx file?

A .qfx file is a QFX 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/vnd.intu.qfx. When serving .qfx over HTTP, set the Content-Type header as shown in Developer info below.

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

How to open .qfx files

Use VS Code or Notepad++ to open and edit .qfx 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/vnd.intu.qfx

Common software that reads/writes .qfx:

VS CodeNotepad++Sublime Textjq

Relation chain

.qfxextension of

format

QFX Data & Textserved as

mime type

application/vnd.intu.qfxsent via header

http header

Related extensions

Related MIME types

application/vnd.intu.qfx

.qfx

Common uses

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

How to edit .qfx 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 .qfx files

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

Frequently asked questions

What programs can open .qfx 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 .qfx file?

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

What is the relationship between .qfx and the application/vnd.intu.qfx MIME type?

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

Sources & standards

Updated 2026-09-13

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