MediaSlimPer-file image and video compression for macOS
On-device image and video compression for macOS. MediaSlim tunes each file separately for smaller files with a steadier quality floor. No uploads, originals stay untouched.
Drop images or videos to start
Compression starts automatically · originals kept
Compress images and videos, or convert image formats
Compress
A per-file quality loop finds the smallest file that still looks right across images and videos — not one fixed setting applied to everything.
Convert
Switch between the image formats you actually use — camera RAW files (DNG, NEF, ARW, CR2/CR3, and more) convert directly too.
Compress and convert without opening the app
Finder quick actions
Select images, videos, or folders in Finder, then right-click to compress or convert them in place.
Live progress in the menu bar
Quick tasks show live progress in the menu bar. Click to pause or cancel, then reveal the finished files in Finder.
A steadier quality floor, image by image
Default output is essentially level with TinyPNG in total size (+0.30%); its lowest S2 is 74.47, versus 68.64 for TinyPNG.
Risky mixed content automatically gets a higher quality floor; median S2 is 0.55 higher, with 7 of 8 images no lower than TinyPNG.
Nothing leaves your Mac
Compression runs entirely on your machine — no account, no upload, works offline.
Fully local
Every image and video is processed on your Mac — media data never leaves the device.
Originals kept
Output is written separately. Your original files are never overwritten.
Sensitive assets stay private
Design files, internal screenshots, client assets, and personal videos never touch a third-party server.
Try MediaSlim on your own images and videos
Image and video compression, format conversion, and Finder integration are all free. No account needed — install and start using MediaSlim right away.