Compress Video on an iPhone
Open this page in Safari and pick a clip from Photos. No app to install.
When you pick a video, this page sets a target size worked out from the clip's resolution and frame rate. Change it with the percentage buttons or type an exact size. The video is compressed on the iPhone itself; nothing is uploaded.
Free Video Compressor
No sign-up. No upload. No size limit.
Nothing is uploaded — the file is compressed on your device.
What iOS does on its own
Photos can shorten a clip: tap Edit, move the sliders at both ends of the timeline, then tap Done and choose Save Video or Save Video as New Clip (Apple Support).
Mail offers Mail Drop when a message is over your provider's limit. It sends attachments up to 5 GB as a download link that works for 30 days (Apple Support, checked September 2026). Other destinations need the file itself to be small: see WhatsApp, Discord (20 MB on a free account) or email.
The Camera records HEVC when Settings > Camera > Formats is set to High Efficiency, and H.264 when it is set to Most Compatible. When you share to a device that cannot play HEVC, iOS may convert the video to H.264 on the way (Apple Support).
Compressing in Safari
Open this page in Safari, tap the drop area and pick the clip. Under Target size, drag the bar or tap one of four buttons, 10%, 30%, 50% and 70% of the original; each button shows the size it gives. For an exact number, tap the After size in the estimate row and type it in MB; the page aims 1.5% under what you type. Screen size shows Original and the lower steps. If a size can only be reached at a lower resolution, the panel picks it and says "Resolution set to W × H to reach this size."
Tap Compress video. The progress window shows the percentage and the time left, and the screen stays on until it finishes. In the result, the Compare tab shows both versions with a slider and frame stepping. Tap Download and Safari saves the file to the Downloads folder in the Files app; the Downloads button next to the search field lists it too (Apple Support).
Format stays MP4 (H.264) unless you change it under Advanced. That is the same format iOS falls back to for devices that cannot play HEVC.
On the phone
The clip in Photos is not changed; the result is a new file. If you leave the page before downloading, it warns you. If Safari closes the tab anyway, the last result stays in the browser for up to 7 days.
Once the page has loaded it needs no network, so it works in airplane mode. Only the first audio track is kept. If Safari on your iPhone cannot encode the chosen format, the page says "This browser cannot encode video in the chosen format."
Frequently asked questions
Do I need to install an app?
No. It runs in Safari.
Where does the compressed video go?
Safari saves it to the Downloads folder in the Files app. The Downloads button next to Safari's search field also lists it.
Does it change the video in Photos?
No. The original stays as it is and the compressed version is a separate file.
Can I lock the phone while it runs?
The page keeps the screen on during compression. If the page is closed before you download, the last result is kept in the browser for up to 7 days.
Is the video uploaded?
No. It is compressed on the iPhone, and after the page has loaded it works with no connection at all.
Compress Video on an iPhone
Opens the compressor with a target size computed for this page.