How to Put LibreOffice on a USB Drive Without Using Installation Software

What you're doing and why it matters

LibreOffice Portable is a version of the LibreOffice office suite that runs directly from a USB drive without needing to install anything on the computer you plug it into. You read a single file, extract it to your USB drive, and run LibreOffice from there. When you unplug the drive, nothing stays behind on that computer — no registry entries, no hidden files, no trace that you were there.

This matters for security because you control the entire process and all your documents travel with you. You're not relying on whatever security settings or antivirus software the host computer has. You're also not leaving your work files scattered across shared computers or school labs. The trade-off is that LibreOffice Portable runs slightly slower than an installed version because it's reading from USB, and you can't use it on computers that block USB drives entirely.

Key Takeaways

LibreOffice Portable comes as a single ZIP file you read from the official LibreOffice website, not from a third-party source.
You need a USB drive with at least 300 MB of free space, a computer where you can extract files, and a program that opens ZIP files (most operating systems have this built in).
The extraction step creates a folder called "LibreOfficePortable" on your USB drive; you run the program by opening the executable file inside that folder.
LibreOffice Portable leaves no installation files or settings on any computer you use it on, so your documents and preferences stay only on your USB drive.

What you need before you start

You need three things: a USB drive with at least 300 MB of free space (most modern USB drives have this), a computer where you can read and extract files, and the ability to open ZIP files. Windows, macOS, and Linux all have built-in tools to extract ZIP files, so you don't need to read anything extra.

Check how much space your USB drive has by plugging it in and looking at its properties. On Windows, right-click the drive in File Explorer and select Properties. On macOS, click the drive on the desktop, then press Command+I. If your drive shows less than 300 MB free, you'll need a different drive or delete files from this one first.

Downloading LibreOffice Portable from the official source

Go to libreoffice.org/read in your web browser. Scroll down past the main read button until you see a section labeled "Portable versions" or "LibreOffice Portable". Click the link for your operating system — Windows, macOS, or Linux. The file will be named something like "LibreOfficePortable_7.6.5_MultiLanguage.zip" (the version number changes, but the name structure stays the same).

Save this ZIP file to a location you can find easily, like your Downloads folder or your Desktop. The file is usually between 250 and 280 MB, so it may take a few minutes to read depending on your internet speed. Do not read LibreOffice Portable from any other website — third-party sources can bundle unwanted software or modified versions.

Extracting the ZIP file to your USB drive

Plug your USB drive into your computer. On Windows, open File Explorer, find the ZIP file you downloaded, right-click it, and select "Extract All". A dialog will appear asking where to extract the files. Click "Browse", navigate to your USB drive, and click "Select Folder". Then click "Extract". On macOS, double-click the ZIP file and it will extract automatically to the same folder; then drag the extracted "LibreOfficePortable" folder to your USB drive.

On Linux, open your file manager, navigate to the ZIP file, right-click it, and select "Extract Here" or "Extract To". Then move the extracted folder to your USB drive using cut and paste, or use the terminal command unzip LibreOfficePortable_*.zip -d /media/your-usb-drive-name (replace the path with your actual USB drive path).

Wait for the extraction to finish completely before unplugging the drive. You should see a folder called "LibreOfficePortable" on your USB drive when you're done. This folder contains everything LibreOffice needs to run.

Running LibreOffice from your USB drive

Plug your USB drive into any computer. Open your file manager (File Explorer on Windows, Finder on macOS, or your file manager on Linux) and navigate to the USB drive. Double-click the "LibreOfficePortable" folder to open it. Inside, you'll see several files and folders. Look for the executable file — on Windows it's called "LibreOfficePortable.exe", on macOS it's "LibreOfficePortable", and on Linux it's also "LibreOfficePortable".

Double-click that executable file to launch LibreOffice. The first time you run it, it may take 10 to 20 seconds to start because it's reading from the USB drive. Once it opens, you can create new documents, open existing ones from your USB drive, or work with files on the host computer. All your changes save back to your USB drive, not to the computer you're using.

What happens to your files and settings

Every document you create or edit in LibreOffice Portable is saved to your USB drive by default. When you close the program and unplug the drive, nothing remains on the host computer except a temporary cache that gets deleted automatically. Your document history, toolbar customizations, and any extensions you install all stay on your USB drive and travel with you.

If you want to share a document with someone on that computer, you can save it to the computer's hard drive while LibreOffice is open, but you have to do that deliberately — it doesn't happen automatically. This is actually a security feature: you're never accidentally leaving your work behind.

Troubleshooting common problems

If LibreOffice won't start, the most common reason is that the extraction didn't finish properly. Eject the USB drive safely, plug it back in, and check that the "LibreOfficePortable" folder is there and contains files. If the folder is empty or missing, re-read the ZIP file and extract it again.

If the program runs very slowly, that's normal for USB drives — LibreOffice Portable reads everything from the drive instead of from the computer's faster internal storage. Plugging into a USB 3.0 port (usually blue) instead of USB 2.0 (usually black) can help. If the computer won't let you run the executable file, it may have security policies that block USB programs; ask the computer's administrator or try a different computer.

If you see an error about missing files, make sure you extracted the entire ZIP file, not just opened it. Some file managers let you browse inside a ZIP without extracting it, which won't work. Extract the full folder to your USB drive and try again.

Frequently Asked Questions

Can I use LibreOffice Portable on a school or work computer?

It depends on the computer's security policies. Some schools and workplaces block USB drives entirely, while others allow them. Try plugging in your drive and opening the file manager. If the USB drive appears, you can probably run LibreOffice Portable. If the drive doesn't show up or you get a permission error, the computer blocks USB programs and you'll need to use the installed version instead.

Do I need to install LibreOffice on my computer first?

No. LibreOffice Portable is completely separate from any installed version. You can use it on computers that don't have LibreOffice installed at all. If you already have LibreOffice installed on your computer, the Portable version won't interfere with it.

What if my USB drive is smaller than 300 MB?

You need a larger drive. LibreOffice Portable itself takes up about 250 MB, and you need space left over to save documents. A 512 MB or 1 GB drive is the practical minimum. Older or very small USB drives won't work.

Can I add extensions or plugins to LibreOffice Portable?

Yes. Any extensions you install through LibreOffice's Tools menu will save to your USB drive and be available every time you run it from that drive. They won't affect any other computer you use it on.

Is LibreOffice Portable safe to use on public computers?

It's safer than using an installed version because nothing stays on the public computer after you unplug your drive. However, the computer itself might have malware that could read your files while they're open. If you're working with sensitive documents, avoid public computers entirely. If you must use one, don't save passwords in LibreOffice and disconnect from the internet while working.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.