# gzip > Compress/uncompress files with gzip compression (LZ77). > More information: . - Compress a file, replacing it with a gzipped compressed version: `gzip {{file.ext}}` - Decompress a file, replacing it with the original uncompressed version: `gzip -d {{file.ext}}.gz` - Compress a file, keeping the original file: `gzip --keep {{file.ext}}` - Compress a file specifying the output filename: `gzip -c {{file.ext}} > {{compressed_file.ext.gz}}` - Decompress a gzipped file specifying the output filename: `gzip -c -d {{file.ext}}.gz > {{uncompressed_file.ext}}` - Specify the compression level. 1=Fastest (Worst), 9=Slowest (Best), Default level is 6: `gzip -9 -c {{file.ext}} > {{compressed_file.ext.gz}}`