XnConvert

Batch image converter and resizer with over 80 actions and live preview.

Get it

Windows 11: not yet verified.

Free for personal use — businesses need a paid license.

The promise

• ✓ No ads
• ✓ No purchases
• ✓ No subscriptions
• ✓ No trials
• ✓ No nagging
• ✓ No surprise bundles

Something wrong?

Reports go to a human review queue. No timeline promised — this is a small pilot, but every report gets read.