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What is HXS? HXS is used as the file extension for Windows Help 2.x files. .HXS files are binary files that can be opened by Windows Help 2 software. See the sample .HXS file included below.

File Extension: .HXS

MIME Type: application/octet-stream

File Content: Windows Help

.HXS files are Windows Help files saved as binary files. Here are the first 64 bytes of a sample .HXS file, cpref.hxs, dumped in HEX values:

4d 5a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 MZ..............
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 00 ................
50 45 00 00 4c 01 02 00 00 00 00 00 00 00 00 00 PE..L...........
00 00 00 00 e0 00 01 20 0b 01 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 40 00 00 00 00 00 00 02 00 00 ................

.HXS Windows Help file sample: Click sample.hxs to download.

For more information on .HXS, read:

• Microsoft Help 2 Reference