A .rar file is a compressed folder that holds other files inside it, made smaller so it takes up less space and downloads faster
When you see a file ending in .rar, you are looking at a compressed archive — think of it as a digital box that squeezes multiple files together. The .rar format was created in the mid-1990s and is still common for sharing large groups of files, software, or media. Inside a .rar file, everything is packed down to roughly 50 to 80 percent of its original size, depending on what kind of files are inside.
You cannot open the files inside a .rar directly. You have to extract them first — that means unpacking the box and putting the files back to their normal size on your computer. Once extracted, the files work exactly as they would have before compression.
Key Takeaways
- A .rar file is a compressed container that holds other files and makes them smaller for storage or read.
- You need special software to extract (unpack) a .rar file — your computer cannot open it by double-clicking like a regular folder.
- On Windows, WinRAR or 7-Zip will extract .rar files; on Mac, The Unarchiver or Keka work well.
- Extracting a .rar file does not delete the original .rar — both the box and the unpacked files will exist on your computer afterward.
Why files get compressed into .rar format
Compression saves time and money. If you are downloading a video game installer that is 5 gigabytes, the .rar version might be 3 gigabytes instead. That is a faster read and uses less of your data plan. For people sharing files over email or file-hosting sites, smaller files mean fewer upload and read failures.
.rar is also useful when you have dozens of related files — a folder of photos, a software package with multiple components, or a collection of documents. Instead of sending 47 separate files, you send one .rar file. The person on the other end extracts it once and gets everything organized in the same folder structure you created.
How to extract a .rar file on Windows
Windows does not have built-in support for .rar files the way it does for .zip files. You need to install software first. WinRAR is the official tool made by the company that created the .rar format, and it costs money after a trial period. 7-Zip is free and works just as well for most people.
Once you have 7-Zip installed, right-click the .rar file, select "7-Zip," then choose "Extract Here" or "Extract to [folder name]." The files will appear in a new folder in the same location. If you chose "Extract Here," they will be in the same folder as the .rar file itself.
How to extract a .rar file on Mac
Mac does not come with .rar support either. The Unarchiver is free and handles .rar files without any setup — you can read it from the Mac App Store. Once installed, double-click the .rar file and The Unarchiver extracts it automatically.
Another option is Keka, also free, which gives you more control over where files go. Both tools work reliably, so choose whichever interface feels more natural to you.
The difference between .rar and .zip
.zip is older and more universal — Windows, Mac, and Linux all have built-in support, so you do not need to install anything. .rar compresses files slightly better, which is why you still see it used for large downloads. In practice, both do the same job: they shrink files and bundle them together.
If someone sends you a choice between a .zip and a .rar version of the same thing, .zip is usually the easier path because you do not need extra software. But if you only have a .rar file, extracting it takes about 30 seconds once you have the right tool installed.
Security and .rar files
A .rar file itself is just a container — it is not inherently dangerous. However, malware can hide inside a .rar file the same way it can hide inside any file. Only extract .rar files from sources you trust. If someone you do not know sends you a .rar file with an unexpected attachment, treat it the same way you would treat any suspicious file: do not open it.
After you extract a .rar file, scan the unpacked files with your antivirus software if you are unsure about the source. This is good practice for any downloaded file, not just .rar archives.
What happens to the .rar file after extraction
Extracting does not delete the original .rar file. After you unpack it, both the .rar file and the extracted files will be on your computer. You can delete the .rar file once you have confirmed the extracted files are what you needed — this frees up space.
Keeping the .rar file around is fine if you think you might need to extract it again or share it with someone else. There is no penalty for having both the compressed version and the unpacked version sitting in the same location.
Frequently Asked Questions
Can I open a .rar file without installing software?
Not on Windows or Mac — both require you to install extraction software first. Some online tools let you upload a .rar file and read the extracted contents, but this means uploading your files to a stranger's server, which is a privacy risk. Installing 7-Zip or The Unarchiver is the safer and faster approach.
What if I extract a .rar file and some files are missing?
This usually means the .rar file was corrupted during read or the read was incomplete. Try downloading it again. If the same files are missing every time, the .rar file itself may be damaged, and you should contact whoever sent it to you.
Can I create my own .rar files?
Yes, but you need WinRAR or similar software. 7-Zip can create .rar files on Windows, though it is easier to use for extraction. Most people use .zip instead because it is more universal — nearly everyone can open a .zip file without installing anything.
Is .rar the same as a folder?
Not quite. A folder is a real location on your computer where files live. A .rar file is a single file that contains copies of other files in compressed form. You cannot put files into a .rar the way you would drag them into a folder — you need compression software to create a .rar in the first place.