AFL File

What are AFL files and how to open them

Are you having problems opening an AFL file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your AFL files.

What is an AFL file?

AFL files have multiple uses, and Allways Font is one of them. Read more about the other uses further down the page.

Allways Font File

Allways Font File is a proprietary font format used by the Allways add-on for Lotus 1-2-3, a spreadsheet program popular under MS-DOS. It stores font definitions for typefaces that Allways uses to let users apply different fonts, sizes, styles and formatting to text within Lotus 1-2-3 sheets and printouts.

The Allways add-on is written by Funk Software and typically creates a .AFL file when a user installs or configures custom fonts for use with Lotus 1-2-3 version 2.0, 2.01, or 2.2. After creation it is used by Lotus 1-2-3 with the Allways extension when rendering worksheets and print layouts; the .AFL file isn't usually edited directly but is loaded by the software at runtime.

Files begin with a specific binary header that identifies them as Allways font files and include internal structures defining glyph outlines or bitmap data, font metrics, character widths and style directives. The file contains entries mapping character codes to glyph data, font face name identifiers, style flags (such as bold or italic), and table entries for device or printer compatibility.

How to open AFL files

Important: Different programs may use files with the AFL file extension for different purposes, so unless you are sure which format your AFL file is, you may need to try a few different programs.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Last updated: August 17, 2026

All known file formats using extension .AFL

While Allways Font File is a popular type of AFL-file, we know of 2 different uses of the .AFL file extension. Different software may use files with the same extension for different types of data.

X-Plane Airfoils

X-Plane Airfoil files describe the aerodynamic performance of a wing cross-section (airfoil) and are used by X-Plane's Airfoil Maker and Plane Maker tools. These files contain lift, drag, and pitching moment data over a range of angles of attack (often −20° to +20°, or −180° to +180°) for one or more Reynolds numbers.

Airfoil files are created by the Airfoil Maker application bundled with X-Plane. Designers can adjust parameters like lift-curve slope, curvature near stall, maximum lift, drag minimum, and moment change points, then save those settings into an .afl file. These files are stored in the "Airfoils" folder and selected within Plane Maker to assign root/tip and low/high Reynolds number airfoils to wings.

Each .afl file is formatted as text and includes a series of polar curves ("polars") listing angle-of-attack vs. lift, drag, and moment coefficients. The format version (e.g. 700, 900, 1110) indicates how many polars and how the data are organized. Code libraries for X-Plane airfoils can parse and write these text files with exact round-tripping for compatibility with X-Plane.

Internal identifiers include ASCII strings such as "DEVICE TYPE CODE" appearing near the start of the file, the inclusion of "-0.00000" formatted zero values, and a byte value 0x0D at offset 1.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

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