WMA to MP4 Converter
Convert WMA to MP4 online — fast, secure, watermark-free. No signup required.
auto-delete in 24h · no signup · no watermark
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How to convert WMA to MP4 online
- Click "Browse Files" or drag your WMA file into the converter above (up to 200 MB free, 500 MB with an account).
- The target format is preset to MP4 — adjust quality options in the picker if you need to.
- Hit "Convert". Your file uploads over an encrypted connection and converts automatically in the cloud — nothing to install.
- Click the green "Download" button to save your MP4 file. The original is deleted immediately and the result auto-deletes after 24 hours.
That is the entire flow — no email address, no software install, no watermark on the output. The page you are reading handles WMA to MP4 from start to finish.
What's the difference between WMA and MP4?
WMA (Windows Media Audio) and MP4 (MPEG-4 Part 14) solve different problems: WMA is a lossy compression format built for legacy Windows audio files, while MP4 is a media container format whose strength is universal video playback and sharing. In practice you will meet WMA when dealing with legacy Windows audio files, and reach for MP4 when you need universal video playback and sharing — the table below compares them point by point.
| WMA | MP4 | |
|---|---|---|
| Full name | Windows Media Audio | MPEG-4 Part 14 |
| Developed by | Microsoft | MPEG (ISO/IEC) |
| Released | 1999 | 2001 |
| Compression | Lossy compression | Media container |
| Typical use | legacy Windows audio files | universal video playback and sharing |
| File extension | .wma | .mp4 |
| MIME type | audio/x-ms-wma | video/mp4 |
Why convert WMA to MP4?
WMA (Windows Media Audio) is a lossy audio format Microsoft released in 1999 for Windows Media Player. Once common on Windows PCs and portable players, it has faded from modern devices — phones, Macs, and car systems often cannot play WMA, which is why most people convert it to MP3. Here is when MP4 is the better choice:
- →MP4 with H.264 plays on every device made in the last 15 years — the safe default.
- →Social platforms, editors, and messaging apps all accept MP4 uploads.
- →It runs in the cloud — 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account) — so even a phone or an old laptop converts at full speed.
Before you convert: three quick tips
- ●Decide the use first: 320 kbps for critical listening, 128 kbps when size matters most, and the 192 kbps default for everything else.
- ●Core audio metadata (title, artist) carries over to MP4 where the format supports it; extras like embedded cover art vary by format.
- ●Keep your original WMA — conversion never modifies it, and if you later need a different target format, starting from the original always gives the best quality.
MP4 conversion settings explained
Filevo encodes video with H.264 at CRF 23 using the veryfast preset, with faststart enabled — the engineering balance of compatibility, quality, and speed: the output plays on any device and starts instantly when streamed.
The audio track is encoded as AAC at 128 kbps (higher available in options). Resolution matches the source, auto-adjusted to even dimensions as the encoder requires.
How the conversion works
Filevo's WMA to MP4 conversion is powered by FFmpeg, the open-source media framework behind much of the world's video infrastructure. We run it with compatibility-first settings tuned for everyday playback, and stream progress back to your browser in real time. Because everything runs in the cloud, your device's CPU stays idle — the browser only uploads and downloads.
What is WMA?
WMA (Windows Media Audio) is a lossy audio format Microsoft released in 1999 for Windows Media Player. Once common on Windows PCs and portable players, it has faded from modern devices — phones, Macs, and car systems often cannot play WMA, which is why most people convert it to MP3.
| Full name | Windows Media Audio |
| Developer | Microsoft |
| Released | 1999 |
| MIME | audio/x-ms-wma |
What is MP4?
MP4 (MPEG-4 Part 14) is a multimedia container standardized in 2001 that bundles video, audio, and subtitles in one file. Usually carrying H.264 video with AAC audio, it is the most compatible video format in existence — every phone, browser, TV, and editor plays MP4.
| Full name | MPEG-4 Part 14 |
| Developer | MPEG (ISO/IEC) |
| Released | 2001 |
| MIME | video/mp4 |
Filevo vs other WMA to MP4 converters
An honest comparison — CloudConvert and Convertio are capable tools; here is where Filevo differs:
| Filevo | CloudConvert | Convertio | |
|---|---|---|---|
| Free tier | 10/day | 10/day | 10 credits/day |
| No signup needed | Yes | Yes | Yes |
| Watermarks | None | None | None |
| Ads on free tier | No | No | Yes |
| Pricing model | 1 file = 1 credit, shown upfront | Per conversion minute | Credit packs |
Privacy & file security
Filevo deletes your uploaded WMA file immediately after conversion and removes the converted MP4 within 24 hours. Everything travels over TLS encryption, processing is fully automated with zero human access, and your files are never used for AI training. See our Privacy Policy for details. Privacy Policy →
WMA to MP4 converter FAQ
How do I convert WMA to MP4 for free?
Drop your WMA file into the converter at the top of this page, confirm MP4 as the target, click Convert, and download the result. It is genuinely free: 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account), no watermarks, no software to install, no account required.
Is it safe to convert WMA files online?
Yes. Transfers are TLS-encrypted end to end, and conversion is fully automated — no human ever sees your files. Your uploaded WMA is deleted the moment conversion finishes, and the converted MP4 auto-deletes after 24 hours (you can delete it sooner). We never use your files for AI training or share them with anyone.
Will I lose quality converting WMA to MP4?
Your audio is preserved (re-encoded to AAC) and paired with a generated video track. This is the standard trick for uploading audio to platforms that only accept video.
How long does WMA to MP4 conversion take?
Usually seconds. The conversion itself takes from under a second to a few seconds for images and audio — most of the wait is the upload, which depends on your connection speed. Since processing happens in the cloud, your device stays fast, and you can run several conversions in parallel.
Can I convert WMA to MP4 on iPhone or Android?
Yes. Filevo runs entirely in the browser, so it works the same on iPhone, Android, tablets, and computers — no app to install. On mobile, tap Browse Files to pick from your photos or files.
What's the maximum file size?
Anonymous conversions accept files up to 200 MB; a free account raises that to 500 MB. Paid plans go from 1 GB up to 10 GB per file, with higher daily limits and priority queues.
Can I convert multiple files at once?
One file per conversion today — though you can start several conversions in parallel. Batch upload with zip download is on the near-term roadmap.
What codec does the converted MP4 use?
Filevo encodes MP4 with H.264 video and AAC audio with the faststart flag — the most compatible combination, optimized to start playing instantly when streamed.
Whether you need universal video playback and sharing or simply a file that works where WMA will not open, the converter above turns WMA into MP4 in seconds — free, private, and with nothing to install. Bookmark this page for the next time a WMA file refuses to cooperate.
Last updated: 2026-06-11