Compress a file as GZIP or create a tar.gz archive from multiple files and folders directly in your browser. Read more

What is Gzip create?

Gzip is the DEFLATE-based lossless format specified in RFC 1952. It compresses byte streams rather than providing a directory of files. This tool creates .gz for a single file; for multiple files or folders it first creates TAR, then Gzip-compresses that archive as .tar.gz or .tgz.

How to use this tool

Add files or folders, review their archive paths, select compression level 0–9, and choose a filename matching the structure. Use .gz for one compressed stream and .tar.gz or .tgz when TAR contains multiple entries. Use Gzip Extract to restore it.

Output modes

Download (default) keeps the generated result in browser memory and provides a reusable Download button. You can rename the download without recompressing while the content is unchanged.
Save directly to a file writes the archive incrementally to a local file you choose. It uses less peak memory for large outputs, but there is no repeat Download button without creating again. Availability depends on browser support for the File System Access API in a secure context.

Files are still processed locally and are not uploaded.

Choosing the right format

Gzip supplies compression; TAR supplies multiple filenames, directories, and metadata. Higher compression levels may reduce the output at the cost of time and memory. The same input can have different valid Gzip byte sequences because headers and compressor choices can differ.

Important limitations

Gzip and TAR do not encrypt archive contents or names. Download mode retains the generated output in memory. Direct Save avoids retaining the complete output, though codec state and bounded chunks still use memory. Native streaming tools remain better for very large collections. Review archive paths before sharing the result.

Frequently asked questions

Why can another program not open the result?

Determine whether the output is a single .gz member or a Gzip-compressed TAR. A program that only runs gunzip on .tar.gz will produce a .tar, which must then be extracted separately.