How to Compress a Video on iPhone

"File too large to send." Every phone video eventually hits that wall — chat apps cap around 16 MB, email around 25. Compression gets the same moment through the door at a fraction of the size.

The quick answer

Open the video in Video To MP4's Compress tool and pick a target: under 16 MB for messaging apps, under 25 MB for email, 1080p for uploads — or type a custom size. The app works out the optimal settings and shrinks the file on-device.

Step-by-step: shrink a video to fit

1. Open Video To MP4 → Compress and pick your video.
2. Choose a target. The presets map to real limits: messaging (16 MB), email (25 MB), streaming-quality 1080p, or a custom MB target.
3. Compress. The preview shows the estimated output size before you commit.
4. Send it. The compressed copy is saved separately — your original stays untouched.

How much quality do you lose?

For phone-screen viewing: barely any. Modern encoding is remarkably good at throwing away data eyes don't notice. A 300 MB clip compressed to 16 MB won't survive a cinema screen, but in a chat bubble it looks like the original.

Shrink it further: trim first

The best compression is deleting the boring parts. Trim the clip to the seconds that matter, then compress — the combination routinely turns a 200 MB recording into a 5 MB message.

Compressing to save storage

The same tool works as a storage strategy: re-encode your biggest videos at a smaller size and keep the memories for a fraction of the space. (Pair it with a photo cleaner like our Clear Storage for a full storage reset.)