Convert WebM to MP4 online. Turn browser and screen recordings into MP4 that uploads to TikTok, Instagram and YouTube without errors. Free to use.
Free tier: 3 videos a day without an account, 20 with one, up to 100MB each.
How It Works
Drop an MP4, MOV, WebM or MKV file up to 100MB.
Pick the settings for this tool, or keep the defaults.
Processing takes seconds on a short clip. Download the result — no watermark.
The WebM to MP4 is a free online tool from ShortsHero: browser recordings to MP4. The video is processed on ShortsHero's servers in seconds for a short clip, with no watermark. Free: 3 videos a day without an account, 20 with one, up to 100 MB each.
Browser recordings to MP4.
Why Use This Tool
One processing pass on our servers — no queue behind other people's renders.
The file you download is the file, clean.
Upload from the camera roll and download straight back to it.
H.264 MP4 that plays everywhere, unless you chose another format.
Yes — no account, no watermark. Without an account you can process 3 videos a day up to 100MB each; a free account raises that to 20.
The video is re-encoded once at a high-quality setting (H.264, CRF 23), which is visually lossless at social-media sizes. Nothing is upscaled.
No. Upload, process and download without signing up. With a free account, video results are also saved to a Tools project in your dashboard.
ShortsHero turns long videos into short vertical clips with AI moment detection, face tracking and animated captions — and has free tools for subtitles, transcripts and video formats.
The same transcription powers ShortsHero's clip maker: it finds the strongest moments, reframes them to vertical and adds word-by-word captions in 36 styles.
Try the clip maker freeFree to start · No credit card required
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