FileOptimizer vs PeaZip

FileOptimizer is a free Windows program that recompresses already-compressed files to reduce their size while retaining their format and behavior. It supports batch processing and accepts files through its interface or command line; optimization replaces them with optimized versions. The maker says it handles more than 600 file extensions and identifies types by examining file contents, regardless of extension. Listed formats include APNG, AVIF, BMP, BPG, DDS, DNG, GIF, HEIC, HEIF, ICO, J2C, J2K, JP2, JPEG, JPG, JXL, MNG, MPO, PCX, PNG, PSD, SVG, TGA, TIF, TIFF, and WEBP. By default, it removes extra metadata and keeps originals in the recycle bin. The program includes more than 90 third-party tools as plugins and supports command-line automation. It is provided under the GNU Affero General Public License, free for personal and commercial use without feature limits. The maker lists Windows XP through Windows 11 and Server 2022 among its requirements. Lossy options are also documented for PNG, JPEG, and GIF.

PeaZip is a free file archiver and archive manager for creating, opening, and extracting archives on Linux, macOS, and Windows. It extracts more than 200 archive formats and variants, including 7Z, RAR, TAR, ZIP, Brotli, and Zstandard, and can create supported archives, convert existing ones, and split or join files. Its file manager includes browsing, search, bookmarks, duplicate detection, and integrated text, hex, and image viewers. Encryption options include strong encryption, authenticated encryption, and optional password-and-keyfile two-factor authentication. Tasks set up in the graphical interface can be exported as command-line scripts. Portable packages are available for all three listed platforms and can be used without installation. PeaZip is licensed under GNU LGPLv3 and is free for personal, professional, and commercial use; the listed plan is free. The software says it does not collect or transmit personally identifiable information. Packages are not currently signed, but SHA256 hashes are published for integrity checks. Creating RAR archives requires WinRAR, while opening or extracting ACE files requires the optional UNACE plugin.