MP4 to 3GP Offline Converter
Convert MP4 videos to 3GP format completely offline in your browser
Loading Processing Engine
This tool uses FFmpeg.wasm. The first run downloads the engine (~25MB) — cached after.
Drop your MP4 files here
or click to select
Output Files
Why Use This Tool
Legacy Phone Support
3GP plays on older mobile phones and feature phones with limited codec support.
Small File Size
3GP uses aggressive compression — ideal for low-bandwidth networks and SMS/MMS sharing.
100% Private
Files never leave your device. All conversion happens locally in your browser.
Frequently Asked Questions
What is 3GP format?
3GP (3rd Generation Partnership) is a multimedia container format designed for mobile phones. It uses MPEG-4 video and AAC audio with low bitrate.
Are my files uploaded anywhere?
No. Processing is entirely client-side via FFmpeg.wasm — files never leave your browser.
How big can my files be?
Limited by your device's RAM. ~2GB on desktop, smaller on mobile. Browser memory is the constraint.