Internet Related Files and Formats
Files and formats commonly used for internet applications and web content.
| Extension | Description | Author | File / Link |
|---|---|---|---|
agent
|
Forte Agent and FreeAgent data files | Ray Delio | Download |
asc
|
Text encoding of OpenPGP signatures, keys, and encrypted messages | IETF OpenPGP Working Group | Link |
avif
|
HEIF-based still/animated image format using AV1 intra-frame coding | Alliance for Open Media | Link |
base64
|
RFC2045: BASE64 MIME encoding | Link | |
bbs
|
Hudson message base files (C code) | F.W. van Wensveen | Download |
bluewave
|
Bluewave files: (INF, MIX, FTI, DAT, XTI, UPL, UPI, REQ, PDQ) Version 2.01 | George Hatchew | Download |
| Bluewave files: (INF, MIX, FTI, DAT, XTI, UPL, UPI, REQ, PDQ) Version 3.00 | George Hatchew | Download | |
br
|
General-purpose lossless compression format standardized in RFC 7932 | Link | |
cache
|
Internet Explorer / Netscape Temporary Internet Files Cache (index.dat) | Will Kranz | Download |
cdf
|
Cyberspace Description Format | Carl Tollander | Link |
cer
|
Public-key certificate in DER or PEM encoding, the usual extension on Windows | IETF | Link |
cht
|
ICQ Chat File Specification | Remy Lebeau | Link |
cookie
|
Netscape COOKIE.TXT Files | Download | |
crt
|
Public-key certificate in PEM or DER encoding, conventionally used on Unix-like systems | IETF | Link |
css
|
Cascading Style Sheets 1 | Link | |
| Cascading Style Sheets 2 | Link | ||
dbx
|
Outlook Express DBX files site | Arne Schloh | Link |
| Outlook Express Version 5.0 file format | Will Kranz | Download | |
| Outlook Express 5 DBX message files | Simon Craythorn | Download | |
| File format for Outlook Express 5.0 DBX files | Dave Smith | Download | |
diz
|
FILE_ID.DIZ file format | Download | |
eml
|
Outlook Express for Mac | Anders Lönnberg | Download |
eot
|
Compact font format for web embedding with optional compression and obfuscation | Microsoft | Link |
epub
|
Open, ZIP-packaged reflowable e-book format based on XHTML and CSS | W3C (formerly IDPF) | Link |
etf
|
Enriched Text Format for mail messages | Deprecated resource Link | |
ffivw
|
File Format for the Interchange of Virtual Worlds | Deprecated resource Link | |
fon
|
Telix Telephone Book File Format | Max Maischein | Download |
ftp
|
File Transfer Protocol Specification | Various | Link |
geojson
|
JSON format for geographic features, geometries, and properties, standardized in RFC 7946 | IETF (Butler et al.) | Link |
gltf
|
Royalty-free runtime 3D asset format for scenes and models, with JSON (.gltf) and binary (.glb) forms | The Khronos Group | Link |
html
|
HTML 2.0 (RFC 1866 approved by IETF) | Link | |
| HTML 3.2 Specification (W3C approved) | Dave Raggett | Link | |
| HTML 4 Specification (W3C approved) | Dave Raggett | Link | |
| HTML 4.01 Specification (W3C approved) | Link | ||
http
|
HTTP - Hypertext Transfer Protocol | W3C | Link |
icmp
|
Internet Control Message Protocol | Link | |
ics
|
iCalendar file format | The Internet Society | Link |
idx
|
Outlook Express (IE4) Index File Format and Mailbox files (with C code) | Tom Gallagher | Download |
| Outlook Express (IE4) Index File Format | Jeff Evans, Arne Schloh | Download | |
| Outlook Express Index and message file formats | Barry Eggers | Download | |