TidyByteA video will not send when it is bigger than the limit of the chat app or email service you are using, and a single minute of 4K video is close to 200 MB. The quickest fixes are to send a link instead of the file (iCloud Link or Mail Drop), or to use AirDrop if the person is nearby. If you need a smaller file, trim the clip in Photos or export a lower-resolution copy with iMovie or Shortcuts. Always keep the original.
Why won't my video send from my iPhone?
Every chat app and email service sets a maximum size for what you can attach. Videos hit that limit fast. Text messages sent through your mobile carrier have the smallest limits of all.
Here is how big iPhone video really is:
- 4K at 30 fps, in Apple's default High Efficiency (HEVC) format: roughly 170–190 MB per minute.
- 1080p at 30 fps: roughly 60–65 MB per minute.
- Higher frame rates (60 fps) and "Most Compatible" format make files larger again.
So a two-minute 4K clip can easily be a few hundred MB, larger than most email limits. To check a video's size, open it in Photos and swipe up (or tap the i button). The info panel shows the resolution and file size.
What is the fastest way to send a large video without shrinking it?
If you do not want to lose any quality, do not attach the file at all. Send a link, or send it directly.
Send an iCloud Link
- Open Photos, select the video, and tap the Share button.
- Tap Copy iCloud Link (this needs iCloud Photos turned on).
- Paste the link into any message or email.
The person opens the link and can view or download the full-quality video. The link works for 30 days.
AirDrop to a nearby Apple device
If the other person has an iPhone, iPad or Mac and is in the same room, tap Share › AirDrop and choose their name. The full video transfers over Wi-Fi with no size limit to worry about.
Use Mail Drop for email
In the Mail app, attach the video as normal. When the attachment is too big, Mail offers Mail Drop, which uploads the video to iCloud and sends the recipient a download link instead. Mail Drop accepts files up to 5 GB.
How do I trim a video in Photos so it is smaller?
Often the simplest fix is a shorter clip. Cutting the dead time at the start and end can halve the size.
- Open the video in Photos and tap Edit.
- Drag the yellow handles at each end of the timeline to keep only the part you want.
- Tap Done, then choose Save Video as New Clip so the original stays untouched.
Send the new clip. If it is still too large, shrink it as well.
How do I shrink a video to a lower resolution on iPhone?
Lowering the resolution, for example from 4K to 1080p or 720p, makes the file much smaller. On a phone screen the difference is hard to see. Apple gives you two free tools for this.
iMovie
- Install iMovie from the App Store if it is not already on your phone.
- Create a new movie project and add your video.
- Tap the Share button and choose to save the video. Before saving, choose a lower resolution such as 720p.
- The smaller copy is saved to Photos next to the original.
Shortcuts
The Shortcuts app has an action called Encode Media. Build a short shortcut that takes a video from Photos, encodes it at a smaller size, and saves the result back to Photos. Once made, you can run it from the Share sheet on any video.
Both tools re-encode the video, which takes a little time on longer clips. Neither one deletes your original.
What size should I aim for?
The right size depends on where the video is going. Chat apps usually allow larger attachments than email, and email services differ from one another. If you cannot find the exact limit, aim small: a 720p copy of a short clip is usually well under any of them.
A quick rule of thumb: if it fails to send, halve it. Trim it shorter, drop the resolution one step, or both. Then try again.
Should I keep the original?
Yes. Always send a copy and keep the original at full quality. Once the compressed copy has been sent, you can delete that copy from Photos if you like.
Deleted items go to Recently Deleted, where they stay for 30 days; the space comes back when that album is emptied. If you are also short on storage, free up iPhone space without deleting your photos shows where the big files usually hide.
Frequently asked questions
How big can a video be to text or email?
It depends on the service, and limits change over time. Text messages through your carrier allow the least. Chat apps allow more, and email services usually sit somewhere in between. If your video is more than a minute of 4K, expect to need a link, a trim, or a smaller copy.
Will the person see lower quality?
A trimmed clip has the same quality as the original. A lower-resolution copy loses some sharpness, but on a phone screen 1080p or 720p still looks clear. If the person will watch on a large TV, send an iCloud Link or use AirDrop instead.
Does compressing delete my original?
Not with the methods above. iMovie, Shortcuts and TidyByte all save a new copy; the original stays in Photos until you choose to delete it. Anything you delete goes to Recently Deleted for 30 days.
Why did my video arrive blurry when I sent it through a chat app?
Many chat apps compress videos on their own before sending, and they can be aggressive about it. Sending a copy that is already a sensible size, or sending an iCloud Link, gives you control over how it looks on the other end.
Bottom line. Send a link or AirDrop when quality matters. Trim first, then drop the resolution one step, and keep the original. Most videos that "won't send" only need one of these.
Finds the big videos, duplicates and screenshots. Every deletion is yours to approve, and everything goes to Recently Deleted for 30 days. Free to download.
