Format & Standards

ZIP64 for large archives, Unicode filenames, NTFS timestamp preservation, file attribute handling, and archive comments.

ZIP64

Full ZIP64 support for archives over 4 GB, more than 65,535 entries, and individual files over 4 GB. ZIP64 extensions are applied automatically when needed — no configuration required.

Unicode (UTF-8)

Full international filename support using UTF-8 encoding. Filenames with accented characters, CJK ideographs, emoji, and other non-ASCII characters are preserved correctly across creation and extraction.

NTFS Timestamps

Brutal Zip preserves modification, access, and creation times at 100-nanosecond resolution using NTFS extra fields in the archive. Timestamps are restored accurately during extraction on NTFS volumes.

File Attributes

Read-only, hidden, system, and archive flags are preserved in the archive metadata and restored during extraction. Useful for maintaining file properties when archiving system or configuration files.

Archive Comments

View and edit archive-level comments (up to 65,535 bytes). Comments can contain build information, version notes, or any other descriptive text. Edit from the UI or CLI: BrutalZip.exe --comment archive.zip.

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Compression

Create ZIP archives with three compression methods, nine compression levels, smart probing, multi-threading, and split archive support.

Archive Info & Comparison

Detailed archive metadata with per-entry statistics, on-demand hashing, and side-by-side archive comparison with export.

Repair & Diagnostics

Three repair modes (test, repair central directory, salvage), diagnostic analysis with header verification, and a visual archive map.