FileOptimizer vs NanaZip

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.

NanaZip is a free, open-source file archiver derived from 7-Zip and built for Windows. Its modern MSIX version connects with File Explorer context menus and file associations, while the interface supports Windows 11 context menus, Fluent Design, Mica material, and dark mode. Smart Extraction treats archives with one root item differently from those with several root items to keep extracted files organized. The maker lists formats and codecs including Zstandard, WASM, Electron ASAR, .NET Single File bundles, Brotli, and LZ4. Additional hashes include SHA-256, SHA-512, BLAKE2b, and XXH3. Command-line tools and a 7-Zip execution alias are included. Listed protections include package integrity checks, Control Flow Guard, Shadow Stack compatibility, limits on dynamic code generation, and blocking unexpected remote libraries. It supports Windows 10 version 2004 or later and Windows Server 2022 or later on x64 and ARM64.