SEERSeerKits

Convert WebM to MP4 Online

WebM recordings from Chrome screen capture, OBS exports, and web downloads often fail to open in iMovie, Premiere Pro, or iPhone Photos. SeerKits converts WebM to MP4 (H.264) for universal editing and sharing. The conversion handles VP8 and VP9 video with Opus audio, producing MP4 files that work on virtually every device. No software install, local-first privacy, and free for everyday clip sizes without an account.

Open Video Converter

How It Works

How to convert WebM to MP4 with SeerKits

  1. 1

    Upload WebM file

    Drag your .webm video into the converter. SeerKits displays file metadata and duration.

  2. 2

    Choose MP4 output

    Select MP4 with H.264 encoding. Pick a quality preset for your target use case.

  3. 3

    Save MP4

    Convert and download. Import the MP4 into your editor or share directly on social platforms.

Frequently Asked Questions

Why convert WebM to MP4?
MP4 (H.264) is the most compatible format for video editors, mobile devices, and upload platforms that reject WebM uploads.
Will WebM to MP4 increase file size?
H.264 MP4 may be slightly larger than VP9 WebM at similar quality. Use a medium preset to balance size and clarity.
Is WebM to MP4 free on SeerKits?
Yes. Convert WebM files up to 200 MB on the free web tier without an account.
Can I convert screen recordings saved as WebM?
Yes. Chrome and OBS WebM screen recordings convert cleanly to MP4 for editing in iMovie, DaVinci Resolve, and other NLEs.

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Use the free Video Converter — no account required, files processed locally in your browser.

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