Step 1: Drop your WMA files using the button above or by deposit and leave.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Receive your converted MP4 files.
WMA to MP4 Conversion FAQ
How do I convert a WMA file to MP4?
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Upload your WMA file using the picker above and the converter detects the source type and runs the WMA → MP4 pipeline. The result downloads automatically when conversion completes; no account needed for one-off conversions.
What will the picture be if I put WMA audio into an MP4 file?
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You choose it, because audio alone has no picture. The default is a static waveform render, and you can supply a still image instead — cover art, a title card, a photo — which is held for the whole duration. That is what makes the file uploadable to video-only platforms that will not accept a bare audio track. WMA is Windows Media Audio, Microsoft’s answer to MP3, launched in 1999 and bundled with every Windows install of that era. MP4 is the safest possible delivery target — every phone, browser, console, editor and Smart TV built in the last decade plays it without extra software.
Is the WMA audio re-encoded when it goes into the MP4?
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Only if it has to be. Where the MP4 container accepts the source audio codec directly, the stream is copied in untouched and stays bit-identical. Where it does not, the audio is transcoded once to whatever MP4 does accept, at a bitrate matched to the source so the second pass costs as little as possible. WMA is lossy by default, in an ASF container, with lossless and voice-optimised variants that are rarely encountered. Almost every MP4 in the wild is H.264 video with AAC audio; the container also legally holds HEVC, AV1 and VP9.
How large will the MP4 be compared with the WMA?
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Barely larger, if you use the default still image. A single held frame compresses to almost nothing across the whole duration because every frame is identical to the last, so the file is dominated by the audio track. Choosing an animated waveform instead adds real video data and can double or triple the result.
Do the artist and album tags on my WMA survive into the MP4?
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Partially. Title and artist map onto the video container’s own metadata fields, and embedded cover art is a natural fit for the still image the video displays. Everything else — track number, album, year, genre — has no equivalent slot in a video file and is dropped rather than approximated.
Will the MP4 open directly in a browser?
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Yes, and the WMA would not have. Browsers ship a decoder for MP4 and none for WMA, so a WMA link forces a download while an MP4 renders inline. That is usually the deciding factor when the file is going onto a web page rather than into an application.
Will a surround mix in the WMA stay surround inside the MP4?
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Yes — MP4 carries multichannel audio properly, so a 5.1 mix stays 5.1 with the channel layout intact rather than being folded to stereo. That matters if the file is destined for a home cinema receiver rather than a phone, which will downmix at playback time anyway.
Is the WMA to MP4 converter free?
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Yes — basic WMA → MP4 conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.
How big a WMA file can I convert to MP4?
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Free accounts: up to 100 MB per WMA file. Premium: typically 1 GB per file, depending on the WMA source type. Very large files are split into chunks server-side when the MP4 format allows.
Will conversion change the content of my WMA?
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Conversion preserves all information that both WMA and MP4 can represent. Format-specific features that the MP4 format doesn't support (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — see the format-specific notes on the result page.
Can I convert many WMA files to MP4 at once?
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Yes — drop multiple WMA files into the upload zone and they are queued in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.
Does the WMA to MP4 converter work on phones and 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.
