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File Formats That Compress Well in ZIP Archives
02 June 2026
Useful information about file formats
As we already know, there is little point in archiving certain file formats because they do not compress well. On the other hand, some formats compress very efficiently:
Files that store plain text, including TXT and CSV.
Older Microsoft Office formats whose extensions do not end in X:
- DOC, RTF (Word)
- XLS (Excel)
- PPT (PowerPoint)
Subtitle files, such as SRT, VTT, and similar formats.
XML files and formats based on XML:
MDB (Microsoft Access database) and CAT tool database files based on it:
- Trados Studio: SDLTB, SDLTM
- SDL WorldServer Desktop Workbench (Idiom): WSPRJ, WSTD, WSTM
HTML, HTM, CHM
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