Compress Images Online vs Offline
"Online" doesn't always mean "uploaded." Browser tools like Irreva compress locally — closer to offline apps than to cloud compressors.
Online (browser, client-side)
- No install
- Works on any OS
- Files stay on device
- Uses your CPU/RAM
Offline (desktop apps)
- GIMP, Photoshop, XnConvert
- Better for huge batches and RAW pipelines
- Full filesystem access
Online (cloud upload)
TinyPNG, Compressor.io — convenient but files leave your machine.