Skip to main content
Convert999
FormatsTous les ConvertisseursComparerCas d'UsageToolsBlog
Convertisseur
Convert999

Convertisseur de fichiers en ligne gratuit prenant en charge plus de 400 formats.

Produit

  • Tous les Convertisseurs
  • Formats
  • Comparer
  • Cas d'Usage
  • Tools

Ressources

  • À propos
  • Blog
  • Security
  • Glossary
  • Statistics
  • Changelog
  • Contact

Mentions Légales

  • Politique de Confidentialité
  • Conditions d'Utilisation

© 2026 Convert999. Tous droits réservés.

Made with for the web

HomeFormatsWEBM
.webm

WEBM Converter

Convert WebM Video files online for free — no upload, no registration, 100% private

Vidéo format
Choisir des Fichiers

ou glissez-déposez vos fichiers ici

Taille max : 2 Go

Vos fichiers sont traités localement dans votre navigateur. Rien n'est envoyé à un serveur.

What is a WEBM file?

WebM Video (.webm)

WebM is an open-source video format developed by Google, specifically designed for efficient web video delivery. WebM uses the VP8 or VP9 video codec (or the newer AV1) with Vorbis or Opus audio, providing excellent quality at small file sizes. VP9 delivers quality comparable to H.265/HEVC while being royalty-free. WebM is natively supported by all major web browsers (Chrome, Firefox, Safari, Edge) and is the preferred format for YouTube's adaptive streaming. The format supports transparent video (alpha channel), HDR, and 4K+ resolutions. WebM's open-source, royalty-free nature makes it attractive for web developers and content creators who want to avoid licensing fees associated with H.264/H.265.

Extension: .webmCategory: Vidéo

Convert from WEBM

Convert your WebM Video files to other formats

WEBMMP4WEBMAVIWEBMMKVWEBMMOVWEBMWMVWEBMFLVWEBMM4VWEBMMPGWEBMMPEGWEBM3GPWEBM3G2WEBMVOBWEBMOGVWEBMTSWEBMM2TSWEBMMTSWEBMSWFWEBMASFWEBMDVWEBMF4VWEBMDIVXWEBMXVIDWEBMRMWEBMRMVB

Convert to WEBM

Convert other files to WebM Video format

MP4WEBMAVIWEBMMKVWEBMMOVWEBMWMVWEBMFLVWEBMM4VWEBMMPGWEBMMPEGWEBM3GPWEBM3G2WEBMVOBWEBMOGVWEBMTSWEBMM2TSWEBMMTSWEBMSWFWEBMASFWEBMDVWEBMF4VWEBMDIVXWEBMXVIDWEBMRMWEBMRMVBWEBM

Frequently Asked Questions about WEBM

What is a WEBM file?
A WEBM file is a video format with the extension .webm. WebM Video files are widely used in digital workflows for creating, sharing, and storing video content.
How do I convert WEBM files for free?
Use Convert999 to convert WEBM files for free directly in your browser. Simply upload your file, select the target format, and click convert. No installation or signup required.
Is it safe to convert WEBM files online?
Yes! Convert999 processes all files 100% locally in your browser. Your WEBM files are never uploaded to any server, ensuring complete privacy and security.
What formats can I convert WEBM to?
Convert999 supports converting WEBM to 24+ formats including MP4, AVI, MKV, MOV, WMV and more. Browse the full list above.

Explore WEBM

WEBM Converter

WEBM → all formats

Convert to WEBM

All sources → WEBM

Vidéo

All video formats

File Tools

Compress, resize, merge

Other Vidéo Converters

.mp4MPEG-4 Video.aviAudio Video Interleave.mkvMatroska Video.movApple QuickTime Movie.wmvWindows Media Video.flvFlash Video.m4vMPEG-4 Video.mpgMPEG Video.mpegMPEG Video.3gp3GPP Video.3g23GPP2 Video.vobDVD Video Object.ogvOgg Video.tsMPEG Transport Stream.m2tsBlu-ray BDAV.mtsAVCHD Video.swfShockwave Flash.asfAdvanced Systems Format