iPhone Video Compressor That Stays on Your Phone
Shrink 4K iPhone videos by 50–70% without sending them anywhere. No cloud. No subscriptions. Compress before sharing to WhatsApp, email, or Instagram — right from your pocket.
One-time purchase · No subscription · iOS 15+ · Android 8+
Why Are iPhone Videos So Big?
An iPhone 15 Pro shooting 4K at 60fps records about 900 MB per minute. ProRes can hit 6 GB per minute. A 5-minute birthday video is already bigger than most people's email inbox limit.
WhatsApp has a 16 MB video limit. Email is usually 25 MB. AirDrop is fine — but only if the other person has an iPhone.
Compress first. Then share however you want.
iPhone Video Sizes — Before & After
1-minute clips recorded on iPhone 15 Pro.
| Recording Mode | Original | Compressed | Saved |
|---|---|---|---|
| 4K 30fps | ~400 MB | ~120 MB | 70% |
| 4K 60fps | ~900 MB | ~250 MB | 72% |
| 1080p 30fps | ~130 MB | ~45 MB | 65% |
| 1080p 60fps | ~200 MB | ~65 MB | 67% |
| ProRes 4K 30fps | ~6 GB | ~300 MB | 95% |
| Cinematic Mode 4K | ~450 MB | ~140 MB | 69% |
More Than Just Video Compression
Full storage toolkit in one $4.99 app.
Video Compressor
Select one video or your whole library. Compress to a quality level you choose. Preview size savings before committing.
Photo Compressor
Shrink HEIC and JPEG photos by 40–60%. Useful before uploading to web, email, or non-Apple contacts.
Sort by File Size
See which videos are eating your storage. iPhone doesn't show this — MediaOptim does. Delete the space hogs.
Live Photo Converter
Convert Live Photos to stills and save ~50% per photo. Keeps the image, loses the motion file. iOS only.
100% Private
Nothing leaves your phone. Compression runs on-device. No server, no account, no data collection.
Share Instantly
Compressed? Share directly to WhatsApp, Messages, email, or AirDrop without leaving the app.
When You Need to Compress
Sending to WhatsApp
Problem: WhatsApp cuts you off at 16 MB. Your 1-minute video is 400 MB.
Fix: Compress to ~12 MB first. Sends in seconds, looks great on mobile.
Emailing a video
Problem: Gmail limit is 25 MB. That 2-minute birthday video is 800 MB.
Fix: Compress to ~20 MB. Attach and send like a normal file.
iPhone storage full
Problem: 10 minutes of 4K video = ~4 GB. Storage fills up fast.
Fix: Compress in place. Same videos, 70% less space. Keep shooting.
Uploading to Instagram
Problem: Large files take forever and Instagram re-compresses badly.
Fix: Pre-compress at the right resolution. Faster upload, better quality.
Your Videos Never Leave Your Phone
Every other free video compressor uploads your videos to a server. MediaOptim runs entirely on your device. No network access needed. Works on a plane.
$4.99. Done. Forever.
One-time purchase. All features. No subscription.
MediaOptim Mobile
- Video compressor (unlimited)
- Photo compressor (unlimited)
- Live Photo to still converter
- Sort media by file size
- Junk photo detector
- In-app sharing (WhatsApp, email…)
- All future updates
Less than one month of iCloud storage — and it actually makes files smaller.
Common Questions
Will my videos look worse after compression?
Not in a way you'll notice when watching. The compression removes data the eye doesn't register at normal viewing size. You'd need to pixel-peep side-by-side at 400% to see any difference.
Does it delete the original video?
No. The app saves a compressed copy. Your original stays untouched until you choose to delete it. We recommend keeping originals until you've verified the compressed version looks good.
Does it work on Android too?
Yes. MediaOptim is available on both iOS (15+) and Android (8.0+). The Live Photo feature is iOS-only since Android doesn't have Live Photos.
Can I compress ProRes videos from my iPhone 15 Pro?
Yes. ProRes is supported. A 1-minute ProRes clip can be 6 GB — MediaOptim compresses it to under 300 MB with near-identical quality.
What's the difference between this and the free online compressors?
Free online compressors upload your video to their servers. That means your private videos go to a third-party server, upload time on slow connections, and file size limits (usually 500 MB or less). MediaOptim runs entirely on your phone — no upload, no limit, no privacy trade-off.
Stop Fighting File Size Limits
Compress that video right now and share it anywhere.
One-time purchase · No subscription · Works offline