Can I upload someone else's open source code to my own GitHub repository?

I have a question about proper open source behavior. Let’s say I find an interesting project on a platform like SourceForge that has its own maintainers and users. Would it be appropriate for me to copy that entire project and upload it to my personal GitHub account? I would follow all the licensing requirements of course. But I’m wondering if this is considered bad manners in the open source world. Should I rename the project if I do this, or keep the original name? Part of me thinks it’s perfectly fine since open source means anyone can use the code. But another part of me worries that it might upset the original developers or confuse people about which version is the “real” one.

Yes, you can upload someone else’s open source code to your GitHub repository, provided you adhere to the licensing terms. However, merely copying a project without intending to enhance or modify it may be frowned upon. It’s advisable to clarify your intentions in the README file, detailing how your project relates to the original. Retaining the original name is generally acceptable, but if you plan significant modifications, appending ‘-fork’ to the name can help differentiate your version while honoring the original author’s work.

depends on the license, but yeah, you can do it. don’t just clone everything and not give back tho. i’ve forked stale repos when i needed bug fixes the original maintainer wasn’t doing. just be upfront - credit original authors, link to source, and explain why you forked. same name’s fine if you’re continuing the project, but it can get confusing.

The license lets you do it, but automate this instead of doing it manually.

I’ve built automated systems that monitor upstream repos, sync changes, apply my custom mods, and push to my repos. Zero manual work.

Why this rocks:

Upstream updates happen automatically.
Custom changes get applied consistently.
You can maintain multiple forks easily.
Everything’s documented and traceable.

My workflow watches several SourceForge projects, pulls updates daily, applies patches, runs tests, and pushes clean versions to GitHub. Takes 10 minutes to set up, then runs forever.

The automation handles boring stuff like updating READMEs, maintaining attribution, and posting release notes. You focus on actual dev work instead of repo maintenance.

Scales great too. I’m tracking 15 upstream projects this way. Adding new ones is just tweaking config files.

You’re right - open source licenses allow this. But context matters a lot. If you’re just mirroring an active project without adding anything, you’ll confuse users looking for the real version. I’ve seen duplicate repos fragment issue reporting and split communities. Are you planning to actively maintain and develop the code, or just host a static copy? If it’s just static, contribute to the original project instead. When I fork projects, I always link back to the upstream repo and explain my specific changes in the docs.

Here’s something to think about - you’re signing up for way more maintenance than you expect. I copied a SourceForge project two years back for work features, but had no clue what I was getting into. Users flooded my repo with issues expecting full support. I had to either keep compatibility with the original or constantly explain the differences. Then the original project came back to life, and everyone got confused about which version to use. If you’re doing this, be ready for the long haul or make it crystal clear it’s just a personal snapshot. Also double-check if the project already moved to GitHub - lots of SourceForge stuff migrates there and you might be duplicating work that’s already done.

Everyone’s covered the technical stuff well, but don’t forget about the people side. I forked a dead SourceForge project three years back and the original maintainer actually thanked me for picking it up. We ended up working together and moved everything to my GitHub repo. But I’ve also seen maintainers get pissed when someone just takes their work without asking. My advice? Reach out first if there’s any sign the project isn’t completely dead - even if they only commit once in a while. Just shoot them a quick message about what you’re planning. Saves drama and you might get a collaborator out of it. The open source world cares about talking to each other, not just pushing code.