Upload your Opus file using the picker above and the converter detects the source type and runs the Opus -> MP4 pipeline. The result downloads automatically when conversion completes; no account is needed for one-off conversions.
Is the Opus to MP4 converter free?
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Yes — basic Opus -> MP4 conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.
How big a Opus file can I convert to MP4?
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Free accounts: up to 100 MB per Opus file. Premium: typically 1 GB per file, depending on the Opus source type. Very large files get split into chunks server-side when the MP4 format permits.
Will conversion change the content of my Opus?
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Conversion preserves every piece of information that both Opus and MP4 can represent. Features the MP4 format cannot store (vector data in raster output, formulas in plain-text output, embedded fonts in image output) are rasterized or stripped — the result page flags any feature loss explicitly.
Can I convert many Opus files to MP4 at once?
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Yes — drop multiple Opus files into the upload zone and they queue in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.
Does the Opus to MP4 converter work on phones / tablets?
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Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end without an app.
Which browsers does the Opus to MP4 converter support?
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Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses a plain `<input type="file">` upload — no WebAssembly or PWA dependencies — so even older browsers convert Opus to MP4 successfully.
Are my Opus files kept private?
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Yes — uploaded Opus files are processed in isolated workers and deleted within minutes. We never view, retain, or share content. See /privacy/ for the data-retention window.
What if the MP4 download does not start automatically?
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Disable any pop-up blocker, then click the download button manually. The result link stays active for 24 hours, so if your network fails mid-download you can re-trigger from the result page without re-uploading the Opus.
How long does Opus to MP4 conversion take?
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Typically seconds for small files, a minute or two for files near the size cap. The server-side pipeline runs on dedicated workers — your laptop CPU is not the bottleneck.
Do I need to install software to convert Opus to MP4?
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No — the converter runs entirely in your browser plus our servers. No desktop install, no plugin, no extension. Just upload your Opus, wait, download the MP4.
Can I convert Opus to MP4 without an account?
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Yes for one-off conversions. Sign up free for batch history, server-side file storage, and higher conversion limits. Premium adds parallel workers, bigger file caps, and removes ads.
Opus je odprt, brezplačen zvočni kodek, ki zagotavlja visokokakovostno stiskanje za govor in splošni zvok. Primeren je za različne aplikacije, vključno z glasom prek IP (VoIP) in pretakanjem.