The Archive name and parameters dialogue box shown opens. Leave the. Update mode : The possibilities are Add and replace files , Add and update files , Fresh existing files only , and Synchronize archive contents.
Select as appropriate. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings. Learn why people trust wikiHow. Download Article Explore this Article methods. Tips and Warnings. Related Articles. Article Summary. Method 1. Install 7-Zip for Windows. Once downloaded, double-click the installer and follow the on-screen instructions to install 7-Zip. Right-click the file or folder you want to compress. If you want to compress multiple files into one ZIP, you can add them to a folder and right-click that, or just hold down the Control key as you click each file, and then right-click the highlighted area.
Select 7-Zip on the menu. A few options will appear. Click Add to archive…. Select an archive format. The ZIP format is the easiest to open on other platforms, but if you choose the 7z format, you'll typically wind up with a smaller ZIP file. If you plan to send a 7z file to someone else, they'll be able to decompress it without installing additional software on a Mac.
If they are using Windows, they'll need to install 7-Zip, WinZip, or another 7z-compatible archive app. Select Ultra from the "Compression level" menu. This will produce the smallest-possible file size. However, compression and decompression can take a long time and large dictionary sizes require better computer hardware.
You can try a size that is 10 times lower than your memory, or stick to the default if that takes too long. If a file is particularly large, you have the option to split the file into smaller files.
Use the drop-down menu below "Split to volumes, size" to select how big you want each split file to be. Click Ok. It's in the lower right corner. This compresses your file. Method 3. Right-click the file s you want to compress. To select more than one file at a time, press and hold the Command key as you click each file. Then, right-click the highlighted files. You can compress most files types on your Mac. The size of the compressed file will vary depending on the type of file it is—images, text files, and various documents can usually compress to much smaller files than video and audio, for example.
Click Compress. This compresses the file into a ZIP file, which also reduces its size. ZIP file extension, which is a globally-used compression format that can be opened on nearly any system without needing special software.
To decompress the file, double-click it. Method 4. Download Avidemux. To compress a large video into a smaller file, you'll need compression software that's specifically for video.
Avidemux is a free option that can considerably decrease a video's size, and it's available for Windows, Mac, and Linux. Click the download link for your operating system. Open the downloaded file in your web browser or Downloads folder. Follow the instructions to complete the installation. Launch Avidemux. You'll find it in the Windows Start menu or your Mac's Applications folder. Compressing a video means sacrificing its quality. You can play around with compression options to figure out the best size-to-quality ratio.
A roundup of the top 3 programs are given below:. The program features an impressive compression rate, can handle large-sized files up to 16billion Gigabytes as claimed by developers and has its own compressed format called 7z.
Solid compression is used by the program to considerably reduce the file size, and it supports a number of formats for packing and unpacking. Step 2. Search for the file that you wish to compress and click Add key. Step 3. A new window of "Add to Archive" will open.
Set zip as the archive format and click OK. The files will successfully reduce in size and will automatically save the location of the original file. This is another popular compression software that supports multiple extraction formats.
RAR is the proprietary format of the company that is best rated in terms of accuracy and speed. The program features full RAR support, self-extracting creation of archives and themes, and good encryption speed. The software comes with a free trial version and a paid complete version. Select the files to compress, right-click, and "Add to archive. PeaZip is used by a large number of people, owing to its user-friendly features and attractive interface.
The program makes use of simple and friendly language, which makes the entire task quick and smooth. The program allows converting compressed archives to other formats and is also capable of repairing the files which are damaged. The toolkit of the program ensures security and keeps your entire data safe through encryption and optional identity check.
Select the desired format for the archive and click OK to start the process. Image files are generally large in size, as they have a lot of detail. If you have a number of images which need to be sent or shared through emails, social network, and other means, a lot of time is needed. Moreover, storing these images on your system means occupying a major portion of your storage space. In the above-listed situations, the best solution is to compress the image files.
There are a number of programs and software that help you with the image compression task, and Caesium Image Compressor is one of them.
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