Compress video on iPhone
No app needed. Open this page in Safari on your iPhone, pick your video, and compress it on-device — your clip never leaves your phone.
Drop a video here, or browse
MP4 · MOV · WebM — compressed right here, nothing uploaded
100% on-device · no signup · no watermark
Loading compressor…
Bigger files take longer — your CPU does the work, privately.
Compress without installing an app
iPhone videos are large because the camera records high-bitrate HEVC or H.264, often at 4K. Instead of downloading a compressor app that uploads your footage, use this page in Safari — it compresses locally and asks for nothing.
Tap “browse”, choose a video from your library, pick a target (WhatsApp 64 MB, email 25 MB, or custom), and save the smaller file back to your phone.
A note on speed
Phones are less powerful than laptops, so large 4K clips take longer and very long ones may hit memory limits. For best results on iPhone, compress shorter clips, or let the YouTube preset scale 4K down: it caps the frame’s short side at 1080 px, so landscape 4K becomes 1920 × 1080 and a vertical 4K clip (2160 × 3840) becomes 1080 × 1920.
Frequently asked questions
How do I compress a video on my iPhone for free?
Open this page in Safari, tap browse, pick your video, choose a target size, and compress. No app to install and nothing is uploaded.
Do I need an app?
No — it runs in Safari. That also means your video stays on your phone instead of being uploaded to an app’s servers.
Why is it slow on my iPhone?
Compression uses your phone’s CPU. Big 4K clips take longer; trimming them, or letting the YouTube preset cap the short side at 1080 px (1920 × 1080 for landscape 4K, 1080 × 1920 for vertical 4K), gets you a faster result.
Will it save back to my Photos?
You download the compressed MP4, which you can then save to Files or Photos and share from there.