SumatraPDF vs Ultra File Opener
| SumatraPDF | Ultra File Opener | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | No | No |
| Platforms | Windows | Windows |
| Free plan | Yes | Yes |
| Primary access | — | desktop |
| Archive preview | — | Yes |
| Office file preview | — | Yes |
| Code file preview | — | Yes |
Both are listed in Best File Viewer Software. On Freedom251, SumatraPDF scores higher on our published basis.