Compress Video for iMessage & Text Messages
Opens at 100 MB. Type a smaller size for MMS.
This page opens the compressor with the target set to 100 MB. A video already under that size shows "At this setting the file stays about the same size." In that case, click the After size and type a smaller number in MB.
Free Video Compressor
No sign-up. No upload. No size limit.
Nothing is uploaded — the file is compressed on your device.
iMessage, RCS and MMS (checked September 2026)
Messages on iPhone sends a video in one of three ways. iMessage uses blue bubbles; RCS and SMS/MMS both use green ones. Apple lists high-resolution photos and videos for iMessage and RCS, and gives no size limit for either (Apple Support). RCS on iPhone needs iOS 18 and a carrier that supports it (Apple Support).
MMS limits are set by carriers. AT&T delivers picture and video messages of up to 1 MB and compresses larger attachments before sending; other carriers may set stricter limits (AT&T Support). To prepare a clip for MMS, click the After size and type 1. When 1 MB cannot hold the video at its current resolution, the panel picks a lower one, marks that row with a dashed amber frame and shows the new size. A 15-second 1080p clip at 30 fps comes out at 480p.
iPhone videos are HEVC
iPhones record HEVC by default (the High Efficiency camera format). Apple notes that when the receiving device does not support it, Messages may send the video in a more compatible format such as H.264 (Apple Support). MP4 (H.264), the default format here, plays on iPhone and Android.
On a computer, the browser has to decode the HEVC file first. That works only on devices with a hardware HEVC decoder, because Chrome has no software HEVC decoder. On the iPhone itself, open this page in the browser and choose the video from your photo library. The screen stays awake while it compresses.
Frequently asked questions
What is the iMessage video size limit?
Apple does not publish one (checked September 2026).
Why do videos sent to Android look blurry?
If the message goes as MMS, the carrier's limit applies. AT&T's is 1 MB, and larger attachments are compressed to fit. Compressing to 1 MB here lets you check the result in the Compare tab before you send it.
What about RCS?
RCS carries high-resolution photos and videos between iPhone and Android when the carrier supports it. On iPhone it needs iOS 18.
Do I need to install an app?
No. It runs in the browser. Once the page has loaded, it works with no network.
Compress Video for iMessage & Text Messages
Opens the compressor with the target preset to 100 MB.