O File Viewer Online
Open and preview .o files (O File) directly in your browser — no downloads, no installs, no account required.
Open O File Now →About O Files
| Extension | .o |
| Full Name | O File |
| MIME Type | application/octet-stream |
| Category | 📄 Documents |
| Processing | 🔒 In-browser (private) |
How to Open O Files Online
- Visit ViewAnyFile.app
Go to ViewAnyFile.app in any web browser.
- Upload your O file
Drag and drop your
.ofile, or click to browse. - View instantly
Your file renders immediately. It stays in your browser — nothing is uploaded.
Frequently Asked Questions
How do I open a O file online?
Visit ViewAnyFile.app and drag your .o file into the upload area. It renders instantly — no download or account needed.
Is it safe to open O files on ViewAnyFile.app?
Yes. All processing for O files happens entirely inside your browser. Your files never leave your device and are never uploaded to any server.
Can I open O files on Mac and mobile?
Yes. ViewAnyFile.app works in any modern browser on Windows, macOS, Linux, iPhone (Safari), and Android (Chrome). No operating system restrictions.
Do I need to create an account?
No. ViewAnyFile.app is 100% free with no signup required. Just drag, drop, and view.