Free Online Video Converter

Convert between MP4, MOV, WebM, AVI, MKV, MP3, and GIF without installing FFmpeg or a desktop app. Choose your target format, click convert, and download a file that plays on any device or platform you need to reach.

All conversion happens in your browser tab — the same FFmpeg engine professionals use, compiled to WebAssembly so it runs locally. There is no file upload, no queue, and no limit on how many conversions you run in a session.

How to convert a video format online

1

Upload your source file

Drop or browse for MP4, MOV, WebM, AVI, MKV, or other common containers. FFmpeg reads the stream metadata to confirm compatibility.

2

Choose the output format

Pick MP4 for universal sharing, WebM for web embedding, MOV for Apple workflows, MP3 to extract audio, or GIF for short animated loops.

3

Adjust quality settings if needed

Default settings are optimised for each format. Lower bitrate if you need a smaller file; raise it for archival quality.

4

Start conversion

FFmpeg demuxes, transcodes, and remuxes the stream locally. Progress shows in the browser.

5

Download the converted file

Save the output. Play it in your target app to confirm compatibility before sharing.

Common use cases

  • MOV to MP4 for cross-platform sharing

    iPhone and Mac videos arrive as MOV or HEVC. Convert to H.264 MP4 so Windows users, Android devices, and web players can open them without codec packs.

  • Video to MP3 for podcasts and audio clips

    Extract the audio track from a video interview, lecture recording, or music video and save it as an MP3 for podcast editing or distribution.

  • MP4 to WebM for website backgrounds

    Self-hosted websites benefit from VP9/AV1 WebM for bandwidth efficiency. Convert your MP4 hero video to WebM and serve both with a source fallback.

  • Video to GIF for chat and presentations

    Short 2–5 second clips convert to GIF for Slack reactions, presentation loop animations, and email newsletter previews.

  • AVI or MKV to MP4 for social uploads

    Legacy recording software outputs AVI or MKV. Social platforms expect MP4. Convert before uploading to avoid rejection or re-encoding by the platform.

Best practices

  • Start with the highest-quality source — converting an already-lossy file degrades quality further.
  • MOV to MP4 at H.264 is the most common conversion; use it as the default safe choice for sharing.
  • For audio-only extracts, MP3 at 192 kbps balances file size and audio quality for voice and music.
  • GIF output grows quickly with clip length — keep source clips under 5 seconds for manageable file sizes.
  • Test WebM output in Safari; older versions of Safari do not support VP9 — serve an MP4 fallback in the HTML source element.
  • Avoid converting the same generation more than once; each lossy pass accumulates artefacts.

Formats & compatibility

Input: MP4, MOV, WebM, AVI, MKV, and other containers FFmpeg supports. Output options: MP4 (H.264+AAC), MOV, WebM (VP8), AVI, MP3 (audio only), GIF (animated). Processing is entirely client-side. Large files and less efficient codecs like GIF take more time.

Related tools

  • Compress Video — reduce file size after converting to MP4
  • Trim Video — cut to the essential segment before converting
  • Video to MP3 — dedicated audio extraction for cleaner MP3 exports

Choose your target format above and convert your video locally — no upload, no waiting room, no fee.

Frequently asked questions

MP4 with H.264 is the safest default — every platform accepts it. See our blog guide on social media video settings for platform-specific bitrate recommendations.
Yes. Upload the MOV, select MP4 as output, and click Convert. Audio and video tracks are remuxed to the MP4 container.
Yes — choose MP3 as the output format and the converter exports the audio track without the video stream.
Transcoding between lossy formats (MOV H.264 to MP4 H.264) involves minimal re-encoding at equivalent quality settings. Container-only conversions (like some MOV to MP4 remuxes) lose no quality at all.
Yes. Keep the source clip short (under 5 seconds) and the resolution modest for a manageable GIF file size.
No server-side limit — browser memory is the practical ceiling. Desktop browsers handle multi-GB files; mobile browsers may struggle with files above a few hundred MB.
No. Conversion is 100% local through FFmpeg WebAssembly in the browser.
VP8/VP9 encoding is computationally heavier than H.264 at equivalent quality. On consumer hardware, expect 2–4× longer encode time for WebM output.