GZIP is a file archiving and compression tool associated with the .gz filename extension. The utility was first released in 1992 for the UNIX operating system, with the intention of replacing the 'compress' tool that comes bundled with UNIX. Today (2015) the tool exists as a standalone cross platform file archiver. Several archiving and compression utilities exist that support the .gz (otherwise known as gzip) format. The motivation behind the format and utility was to create a capable compression archiving tool that was unencumbered by patents of other compression algorithms that existed at the time, particularly those surrounding the LZW algorithm.
The .7z filename extension is associated with the 7z compressed file archive format and the open source 7-zip compression utility both developed by Igor Pavlov. The format had its initial release in 1999. It consists of a start header 32 bytes in size which contains the signature and link to the ending header, followed by the compressed data, a metadata block, and finally the end header. 7z supports limited recovery options for 7z archive files which can open but for one reason or another cannot extract due to CRC or other data related errors.
FreeFileConvert uses tuned encoding for GZIP to T7Z conversions, preserving clarity while trimming file size. Finished audio streams instantly across phones, tablets, desktops, and modern browsers without extra tweaks.
Upload GZIP files from desktop, tablet, or cloud storage, queue multiple jobs, and let the converter finish autonomously. Return whenever convenient to download synchronized T7Z results on any device you rely on.
Process up to 5 files sized 1000 MB per batch without splitting queues manually. Mixed-format uploads convert together, producing consistent T7Z audio with dependable progress tracking.
The format requires that a gzip compatible compressor correctly set identification blocks (ID1, ID2), the compression method, the CRC-32 algorithm to verify the integrity of the archived file, and ISIZE ' the size of the original input. The possible values for compression method is 0 to 7 with 8 reserved for the DEFLATE algorithm which is typically the default method associated with the gzip format.
The 7z compressed archive format was designed to be extensible, to allow it to easily adopt new compression algorithms as they are released. As of writing, the 7z format had support for seven compression algorithms namely LZMA, LZMA2, PPMD, BCJ, BCJ2, BZip2, and DEFLATE. The default algorithm used for compression is LZMA. It is also compatible with the stronger AES-256 encryption algorithm and is capable of compressing file structures of up to 16 Exabyte in size. Filenames can use any characters from the Unicode character set. 7z does not ignore errors found in headers of compressed archives, and as such will not open such archives.
Upload your archive file in the GZIP format from your device, Dropbox, or Google Drive.
Select T7Z as the output format and click Convert. Adjust optional settings if needed.
Download the converted archive file. Each file stays available for up to 5 downloads.