Compress video for iMessage
Free, no watermark, no signup, and your file never leaves your device.
About 40% smaller, quality kept, never larger than the original
Apple does not publish an official iMessage size limit, but in practice attachments up to about 100 MB send reliably, and iMessage silently re-compresses anything larger. That silent compression is exactly why received iMessage videos so often arrive soft and blurry: a large 4K clip gets crushed on the way, with no warning and no control on your end.
Compressing the clip yourself first, to a sensible size under the 100 MB cap, takes that decision away from iMessage and puts it in your hands. You choose the quality-versus-size tradeoff, the file sends cleanly, and the person on the other end sees the video the way you meant it to look rather than a smeared version.
Everything runs on your own device. Nothing is uploaded, which matters for personal videos especially, and it also means there is no upload wait before the file is ready to send.
Questions people ask
- What is the iMessage video size limit?
- Apple does not document an official number, but around 100 MB per attachment is the practical, widely-cited ceiling. Larger videos may still send, but iMessage compresses them silently, which is what makes them blurry.
- Why do my iMessage videos arrive blurry?
- Because iMessage automatically re-compresses videos it considers too large, with no warning. Pre-compressing to a reasonable size under 100 MB avoids that second, uncontrolled squeeze and keeps the video sharp.
- Why does iMessage ask to trim my video?
- For long clips, iMessage prompts to shorten the video rather than send it whole. Compressing first often lets the full clip through without the trim prompt, since the file is small enough to send as-is.
- Is my video uploaded to compress it?
- No. It is processed on your device, in the browser, and never uploaded. Only when you send it does it go to Apple, the same as any iMessage.
Platform limits last verified June 2026. Source: Apple Support communities + cross-referenced sources (no official Apple figure). Limits change; if a number looks off, tell us and we'll recheck.