WebM to 3GP - Online Video Converter

Convert WebM to 3GP online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert WebM to 3GP

[+] Drop WebM video here or click to select WebM

Output format

3GP (H.264 / AAC)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About WebM to 3GP

Convert WebM to 3GP. WebM pairs VP9 video with Opus audio and supports an alpha channel. The 3GP target profile packages H.264 with AAC for legacy handsets. Resolution caps apply, so expect phone-sized output..

Why convert WebM to 3GP?

Smaller files with 3GP lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

WebM vs 3GP

Animation	Yes	Yes
Transparency	Yes	No
Compression	lossy	lossy
Typical use	WebM pairs VP9 video with Opus audio and supports an alpha channel.	The 3GP target profile packages H.264 with AAC for legacy handsets.

When not to convert WebM to 3GP

Skip 3GP for archival masters: lossy compression discards detail, so keep the WebM original.
Flatten transparency first: 3GP has no alpha channel, so composite WebM over a background color.

Limits

Starting point: WebM - VP9 video with Opus audio and alpha support. Apple editors accept it unevenly; keep MP4 for editing round-trips. Resolution caps apply, so expect phone-sized output. Encode 3GP (H.264 / AAC) from WebM at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert WebM to 3GP?

Drop your WebM file onto this page, choose quality and codec settings, then click Convert. The result downloads as 3GP instantly. All processing runs in your browser.

What codec is used for 3GP?

The default codec for 3GP is H.264 / AAC. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.