WebM to WMA Converter

How to Convert WebM to WMA Online

1. Upload Your WebM File: Drag and drop your .webm file onto the page or click "Add Files" to select it. Only .webm is accepted on this page; batch uploads are supported, and everything stays on our servers.
2. Pick Quality Preset or Bitrate: Under "File Compression", choose a Quality Preset (Highest, Very High, High, Medium, Low, Very Low, Lowest), set a Specific file size in KB/MB, type any value into Custom Bitrate (kbps), or pick a Constant Bitrate from the preset list (32-320 kbps). Variable Bitrate ranges are available if you want a quality-target encode rather than a fixed bitrate.
3. Adjust Sample Rate and Channels (Optional): Audio Sample Rate accepts 8000 Hz through 48000 Hz (or leave Original to match the source). Audio Channel can be set to Original, Mono (smaller files, good for voice), or Stereo. Standard WMA tops out at 48 kHz stereo per Microsoft's Windows Media Codecs documentation.
4. Trim (Optional) and Convert: Enable Trim and enter Start Time and Duration in seconds or HH:MM:SS.sss to extract a clip. Click "Convert" and your .wma file downloads when it's done. No watermark, no sign-up.

Why Convert WebM to WMA?

WebM is Google's open-source container — VP8/VP9 video with Vorbis or Opus audio — and most browsers play it fine. WMA is Microsoft's proprietary audio codec, first released in 1999 and bundled with every consumer Windows release from XP onward. Pulling the audio track out of a WebM and re-encoding it as WMA gives you a single-purpose audio file that drops straight into Windows-native workflows where MP3 is fine but WMA was the historical default.

• Windows Media Player and legacy Windows tooling — WMA is the format Windows Media Player was built around. If you're feeding audio into a Windows XP-era kiosk, an Office macro, or a Windows-only DAW that prefers WMA, this is the cleanest path.
• Car stereos and consumer electronics from the 2000s-2010s — many head units, portable players, and HiFi components from that era list WMA alongside MP3 in their supported-formats sheet but not Opus or AAC.
• Smaller files than MP3 at the same perceived quality — Microsoft's docs claim WMA Standard offers CD-quality stereo at 64-192 kbps; for podcasts or voice recordings at 64-96 kbps, a WMA is typically smaller than the equivalent MP3 with similar clarity.
• WMA Voice for spoken content — although the converter outputs WMA v2 (the general-purpose standard), 32-48 kbps mono produces acceptable speech at tiny file sizes for archival or transcript pipelines.
• You only need the audio — a WebM screen recording, browser-tab capture, or HTML5 video download is often 80-95% video data. Stripping to WMA can cut file size by 5-10x while preserving the audio you actually want.
• You're handed a .webm and the target system rejects it — Windows File Explorer, older Office versions, and many enterprise media catalogs still treat WMA as a first-class audio type and WebM as foreign.

WebM vs WMA — Format Comparison

WMA Bitrate and Sample-Rate Guide

WMA v2 maxes out at 48 kHz / 16-bit / stereo per Microsoft's spec. For 24-bit, 96 kHz, or 5.1 surround you would need WMA 10 Pro, which most general-purpose converters and older Windows installs don't write.

Frequently Asked Questions

Why would I still use WMA in 2026 instead of MP3 or AAC?

You usually wouldn't choose WMA for a fresh project — MP3 has near-universal device support and AAC is the streaming default. WMA is useful when the destination requires it: a Windows-only enterprise system, an older car stereo's "WMA-supported" sticker, a Windows XP-era kiosk, or a media catalog whose metadata pipeline was built around .wma. If you're free to choose, WebM to MP3 or WebM to AAC is the more portable answer.

Does this strip the video, or keep WebM playing audio-only?

It strips the video. WMA is an audio-only codec, so the converter decodes the WebM, discards the VP8/VP9 video frames, decodes the Vorbis or Opus audio, and re-encodes it as WMA v2 in a .wma container. The output won't show any picture, just sound.

Will the audio quality drop?

Slightly, because WebM ships with Vorbis or Opus (both lossy) and WMA v2 is also lossy — you're transcoding lossy to lossy. The audible difference at 128+ kbps is usually negligible for speech and pop/rock music. For classical, electronic, or anything where you can hear codec artifacts, encode at 192-256 kbps. The original WebM stays untouched on disk.

Should I pick Constant Bitrate or Variable Bitrate?

Constant Bitrate (CBR) keeps a predictable file size and is safer for old hardware decoders that mishandle VBR. Variable Bitrate gives better quality per byte by spending more bits on complex passages, and Microsoft introduced VBR support in WMA 9 (2003), so modern Windows Media Player handles it fine. For car stereos or 2000s-era portable players, stick with CBR; for desktop playback, VBR is the better default.

Why does WMA sound thin compared to my Opus WebM source?

WebM's Opus track is one of the most efficient audio codecs ever shipped — it can sound transparent at 64-96 kbps in a way WMA can't match. When you re-encode that Opus to WMA at the same bitrate, you're moving to an older codec design without Opus's wideband improvements. Compensate by bumping the WMA bitrate to 160-192 kbps, or skip WMA and use WebM to FLAC if you want a lossless intermediate.

Does WMA play on macOS, iOS, Linux, or Android?

Not natively. macOS dropped Windows Media Components support a long time ago; iOS has never played WMA; Linux and Android need a third-party player. VLC plays WMA on every desktop platform, and most general-purpose Android media players (e.g., VLC for Android, MX Player) handle it. If cross-platform is your goal, MP3 or AAC is a better target than WMA.

What sample rate should I pick?

Match the source if you can — most WebM audio is 44.1 kHz or 48 kHz. Downsample to 22050 Hz only for voice content where file size matters more than fidelity. Upsampling (e.g., 16 kHz source to 48 kHz output) doesn't add real information; it just makes the file bigger. WMA standard's ceiling is 48 kHz, so don't expect 96 kHz output even if your source happened to be high-rate.

Can I extract just a 30-second clip from a long WebM?

Yes. Toggle Trim on, set Start Time to where the clip begins (e.g., 00:01:15.000 for 1 min 15 sec in), and Duration to 30 (seconds) or 00:00:30.000. The converter decodes only that range. If you want to cut several non-contiguous segments and stitch them, do that with the Audio Cutter tool after converting.

Is WMA the same as WMA Pro or WMA Lossless?

No. This converter outputs WMA v2 (also called WMA Standard or WMAV2) — the general-purpose codec built into every Windows install since XP. WMA 10 Pro adds 24-bit/96 kHz and 5.1/7.1 surround, and WMA 9 Lossless is bit-exact archival compression. Both are less broadly supported on third-party hardware than WMA v2, which is why the standard variant is the safer default.