Undersize : Video Compressor
Fit WhatsApp, Discord, mail
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Oversize video?
Make it Undersize — send to WhatsApp, mail or any app without switching.
Exact size, fully offline, one time payment, no subscription.
Compress a too-large video without leaving the app you're in.
Share any video to Undersize from WhatsApp, Messages or Mail, tap one button, and get it
back small enough to send. No switching apps, no re-importing.
ONE TAP TO FIT
- WhatsApp — 16 MB
- Discord — 10 MB free tier
- Email — 20 MB, and we account for the ~⅓ that attachments grow in transit
- Or set any size you want
WE HIT THE SIZE
Most compressors guess. We check the finished file and re-encode if it missed, so "fits
WhatsApp" is a promise rather than a hope.
LOOKS RIGHT, NOT JUST SMALL
Proper HDR handling, correct portrait video, no washed-out colour. Set the resolution you
want, mute the audio, trim before compressing.
PRIVATE BY DEFAULT
Everything happens on your iPhone. No uploads, no account, no servers. Your location and
device details are stripped from the compressed file, so sharing a video doesn't share
where you filmed it.
ONE PAYMENT
No subscription. No ads. No watermark. Ever. One free compression a day; unlock unlimited
compressions and batch mode with a single purchase you own forever.
Terms of Use(EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy:
https://sites.google.com/view/underszizevideocompressor/privacy-page?authuser=0
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Ankit Raj, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ankit Raj
- Size
- 3.3 MB
- Category
- Photo & Video
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 11 more
- English, Arabic, French, German, Hindi, Indonesian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish, Turkish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Undersize Pro $1.99
- Copyright
- © 2026 Undersize