WebM: conversion steps
- Upload your WebM file to start.
- Convert WebM to 3GP.
- Download the WebM file.
About WebM files
an open, royalty-free web video format with VP8, VP9 or AV1 video and Opus or Vorbis audio
WebM is an open, royalty-free video format developed by Google and based on the Matroska container. It holds VP8, VP9 or AV1 video with Vorbis or Opus audio.
It is made for the web: all major browsers play it in the HTML video element, and it is common for screen recordings and short clips.
WebM: what conversion changes
Converting WebM re-encodes video.
WebM: settings to change
Before you convert WebM files, you can adjust: Video codec, Audio codec, Frame rate, Rate control, Width, Quality (CRF), Audio bitrate, Video bitrate, Quality (VBR), Resolution, Sample rate, Colours, Channels, Height, Scale fit, Normalize loudness, Dithering, Encoder preset, Trim start, Trim duration, Keep tags, and Remove metadata.
Limits of the WebM format
WebM allows only its own small set of codecs, so H.264 video or AAC audio has to be re-encoded to fit.
Common questions about WebM
Why can't I upload my WebM video to Instagram or TikTok? Social apps almost always demand MP4, so a WebM made for the web needs converting before it will upload.
Why convert video to WebM for a website? Browsers play it without plugins, and VP9 or AV1 compresses smaller than H.264 at the same quality, so pages load faster.
Does Safari play WebM video? Current Safari releases play WebM, but older Apple devices and QuickTime do not open it. MP4 is the safer container when the video must play on Apple hardware and older software.