Compress iPhone Video
HEVC .MOV in, H.264 .MP4 out. On the iPhone or on a computer.
This page opens the compressor with Advanced open and Format set to MP4 (H.264). When you load a clip, the After size is filled in with a size computed from its resolution and frame rate. You can tap 70%, 50%, 30% or 10% instead, or type an exact size in MB.
Free Video Compressor
No sign-up. No upload. No size limit.
Nothing is uploaded — the file is compressed on your device.
Why iPhone clips are big and sometimes won't open
Since iOS 11 the iPhone can record in HEVC (H.265). Under Settings > Camera > Formats, High Efficiency saves space with HEVC and Most Compatible uses H.264 (Apple Support, checked September 2026). HEVC saves space, yet a few minutes of 4K or 60 fps video is still too big for most chats and mail attachments.
Apple says that when you share by AirDrop, Messages or email to a device without HEVC support, the clip might be converted to H.264 automatically. A file that reaches a Windows PC as HEVC another way needs Microsoft's HEVC Video Extensions, a paid add-on in the Microsoft Store, before Windows' own apps can play it.
What the preset does
The output is H.264 in an MP4 file, which Windows and Android play without add-ons. Screen size lists Original and each lower step; a 4K clip going to a phone or a chat can drop to 1080p or 720p there. A 60 fps clip can go to 30 fps under Advanced → Frame rate. The 4K page opens at 1080p.
On a computer, reading HEVC needs a hardware HEVC decoder. Chrome has no software HEVC decoder, so an older PC without one cannot open the clip on this page. In that case, compress it on the iPhone itself.
On the iPhone
Open this page in Safari, tap the drop area and pick the clip. Compression runs on the phone and the screen is kept awake while it works. Save the result with Download. If the tab closes before you save, the last result stays in the browser for up to 7 days, and the clip in Photos is never changed.
Frequently asked questions
Why won't my iPhone video play on Windows?
It is most likely HEVC, which Windows plays only with Microsoft's HEVC Video Extensions add-on. The MP4 (H.264) made here plays without it.
Can I do this on the iPhone without an app?
Yes, in Safari.
Why does my PC say it cannot decode the video?
The clip is HEVC and the PC has no hardware HEVC decoder. Chrome has no software fallback for HEVC, so use the iPhone or a newer computer.
Does the audio change?
It is kept as is by default. Advanced → Audio can re-encode it at 128 or 64 kbps or remove it; only the first audio track is kept.
Compress iPhone Video
Opens the compressor with a target size computed for this page.