WebM converter

WebM is an open web format with efficient compression. It works well on websites but does not always open on iPhone, TVs and social networks. The converter turns WebM into MP4 or GIF.

Convert from WEBM

WEBM → MP4Video WEBM → GIFVideo WEBM → MP3Video WEBM → MOVVideo WEBM → MKVVideo

Convert to WEBM

MP4 → WEBMVideo MKV → WEBMVideo AVI → WEBMVideo MOV → WEBMVideo

When to replace WebM

If a video does not open on a device or cannot be uploaded to a social network, MP4 with H.264/AAC helps. For a short animation in a chat, GIF is convenient.

Compatibility and weight

WebM saves bandwidth on a website but does not play everywhere. MP4 is more compatible, although it may take more space. The choice depends on the task.

Format questions

Why does WebM not play on iPhone?

iOS supports only some WebM codecs. MP4 with H.264/AAC opens on iPhone without extra apps.

Is quality preserved?

MP4 is encoded at high quality (CRF 23). A small loss is possible but usually invisible.

Can I extract audio from WebM?

The current version offers MP4 and GIF. For audio, use a video format with a sound track or a desktop tool.

Other formats

MP412 conversions GIF4 conversions MOV7 conversions MP38 conversions

Useful guides

VideoWhat is MKV?Learn what MKV is, how it differs from MP4, why it does not open on a phone, and how to convert MKV to MP4, WebM or MOV.1 min read VideoHow to extract audio from videoStep by step: extract audio from MP4, MOV and WebM. Compare MP3, WAV and M4A for listening, editing and podcasts.1 min read VideoHow to make a GIF from videoA step-by-step guide to making a GIF from MP4, MOV or WebM, the settings that affect file size, and how to avoid a heavy animation.2 min read