What is a SFD file?
A file with .sfd (Spline Font Database) extension is native ASCII font format for font editing software - FontForge. The software supports supports many other common font formats and is freely available. The software can be used for almost all modern operating systems including Linux, Windows, and MacOS.
SFD File Format
SFD files are ASCII files that are human readable and are easily transferred across the internet. It is identified by application/vnd.font-fontforget-sfd as its MIME type.
Header
A common SFD file header is as shown in the following exmaple.
SplineFontDB: 3.0
FontName: Ambrosia
FullName: Ambrosia
FamilyName: Ambrosia
DefaultBaseFilename: Ambrosia-1.0
Weight: Medium
Copyright: Copyright (C) 1995-2000 by George Williams
Comments: This is a funny font.
UComments: "This is a funny font."
FontLog: "Create Jan 2008"
Version: 001.000
ItalicAngle: 0
UnderlinePosition: -133
UnderlineWidth: 20
Ascent: 800
Descent: 200
sfntRevision: 0x00078106
WidthSeparation: 140
LayerCount: 4
Layer: 0 0 "Back" 1
Layer: 1 1 "Fore" 0
Layer: 2 0 "Cubic_Fore" 0
Layer: 3 0 "Test" 1
DisplaySize: -24
DisplayLayer: 1
AntiAlias: 1
WinInfo: 64 16 4
FitToEm: 1
UseUniqueID: 0
UseXUID: 1
XUID: 3 18 21
Encoding: unicode
Order2: 1
OnlyBitmaps: 0
MacStyle: 0
TeXData: 1 10485760 0 269484 134742 89828 526385 1048576 89828
CreationTime: 1151539072
ModificationTime: 11516487392
GaspTable 3 8 2 16 1 65535 3 0
DEI: 91125
ExtremaBound: 30
