Short answer: iOS has no built-in "compress" button. Change Settings › Camera › Record Video to 1080p at 30 fps with Formats › High Efficiency for new videos, and use an on-device compressor such as Spaceclear for the videos you already have: it re-encodes them in HEVC, keeps the date, location and HDR, and only removes the originals after you review them.
Steps
- For new videos: Settings › Camera › Formats › High Efficiency, and Record Video › 1080p at 30 fps.
- For existing videos: open Spaceclear › Compress Videos, choose High (1080p), Balanced (720p) or Small (540p).
- Select the videos (biggest first) and check the estimated savings.
- Tap Compress. When it's done, review the originals and delete them.
How big are iPhone videos?
| Setting | About per minute |
|---|---|
| 4K 60 fps (HEVC) | 400 MB |
| 4K 30 fps (HEVC) | 170 MB |
| 1080p 30 fps (HEVC) | 60 MB |
| 720p 30 fps | 40 MB |
FAQ
Does compressing lose quality?
Some, but at 1080p on a phone screen it's hard to see. Spaceclear's High setting is meant to look the same on an iPhone.
Are my videos uploaded to compress them?
Not with Spaceclear: compression runs on the iPhone. Online compressors upload your video.
Updated 2026-11-13