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List is sorted by rating
Rating (?)
Tweets (*)
pr *
  • FileInfo.com
  • www.fileinfo.com
  • Database of file extensions with information about each file type.
4.3
(si*)
>80
5
  • File-Extensions.org
  • www.file-extensions.org
  • Searchable file extension list including descriptions and associated applications.
4.2
(2)
-
5
  • FILExt
  • filext.com
  • Searchable database of file extensions for data formats, with information and notes on each.
4.2
(1)
>150
6
  • File.org
  • file.org
  • Contains detailed descriptions of thousands of file formats and shows the user which products can open them.
4.2
(si*)
>410
4
  • Dot What?!
  • dotwhat.net
  • Database of file extension information. Supports users comments and submissions. Includes discussion forum.
4.0
(si*)
>10
5
  • FileSuffix.com
  • www.filesuffix.com
  • A searchable filename extension database.
4.0
(si*)
<10
4
  • FileFormat.Info
  • www.fileformat.info
  • Source for file format standards, online file conversions, and detailed file specifications, including Unicode characters, MIME types and file extensions.
4.0
(si*)
<5
5
  • Wotsit's Format
  • www.wotsit.org
  • Detailed file formats and data formats for programmers. A large collection of programming resources with detailed information.
3.9
(2)
>10
6
  • Filefacts.net
  • www.filefacts.net
  • Database of file extensions and detailed information about such file types, including software that can be used to open them.
3.9
(si*)
-
1
  • FileDesc.com
  • www.filedesc.com
  • A regularly updated filename extension resource site.
3.8
(si*)
-
2
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