Audio Converter

Upgrade Your WMA Files to the Codec Behind Discord and YouTube

Opus is the IETF-standard codec used by Discord, YouTube, WebRTC, Zoom, and WhatsApp. It delivers better quality than WMA at dramatically lower bitrates and works natively in every modern browser. Upload your WMA and get a future-ready Opus file in seconds.

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Upgrade Your WMA Files to the Codec Behind Discord and YouTube

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Audio Format Converter

Upload any audio file, choose an output format, and download the converted result. Supports MP3, WAV, FLAC, AAC, OGG, ALAC, WMA, Opus and M4A.

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The Codec Behind Discord, YouTube, and WebRTC

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The Codec Behind Discord, YouTube, and WebRTC

Opus is the audio codec powering Discord voice channels, YouTube audio tracks, WhatsApp calls, Zoom meetings, and every WebRTC-based application. It was standardized by the IETF in RFC 6716 and is maintained by the Xiph.Org Foundation with no patent encumbrances. Converting WMA to Opus makes your audio compatible with the entire modern web communication and streaming infrastructure.

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Better Quality at 64 kbps Than WMA at 128 kbps

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Better Quality at 64 kbps Than WMA at 128 kbps

Opus achieves transparent quality for most music content at 96 to 128 kbps, and near-CD quality speech at 24 kbps. In standardized listening tests, Opus consistently outperforms WMA, AAC, and MP3 at equivalent bitrates. For bandwidth-constrained applications, streaming over mobile connections, or web audio assets that need to load fast, Opus delivers more audio quality per kilobit than any other codec available.

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Native in Every Modern Browser, No Plugin Needed

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Native in Every Modern Browser, No Plugin Needed

Chrome, Firefox, Edge, Safari, and Opera all support Opus natively via the HTML5 Audio API and Web Audio API. Web applications, browser-based games, and streaming services can serve Opus audio to every major browser without any fallback format. WMA has zero native browser support. Converting to Opus removes the codec barrier for any web audio use case.

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How It Works

Three steps from WMA to modern Opus audio

Upload your WMA file

Drop any WMA file onto the tool or click to browse. Files from Windows Media Player, Zune, Windows Media Center, or any WMA-producing application are accepted.

Convert to Opus

Click "Convert". FFmpeg decodes the WMA audio stream to PCM and re-encodes it as Opus at a high bitrate, minimizing quality loss from the lossy-to-lossy conversion.

Download your Opus file

Preview the output in the browser player, then download your .opus file ready for web audio, VoIP integrations, Discord bots, streaming platforms, or any modern media pipeline.

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Deep Dive

WMA vs Opus: Proprietary Legacy Codec vs IETF Internet Standard

WMA was designed for the Windows desktop in the late 1990s. Opus was designed for the internet in 2012. The two formats reflect very different engineering goals, and Opus outperforms WMA on every metric that matters for modern audio delivery.

Discord users, web developers, streamers, and VoIP callers using Opus audio

WMA: Designed for Windows, Not the Internet

WMA (Windows Media Audio) was developed by Microsoft in the late 1990s as a codec for the Windows Media Player and Windows Media streaming server. It works natively on Windows and Xbox, but has no presence in the modern web audio stack. Browsers do not support WMA. WebRTC, the protocol powering all browser-based real-time communication, does not include WMA. Discord, Zoom, YouTube, and WhatsApp all use Opus. WMA is effectively a legacy format outside the Windows ecosystem.

TypeLossy compression, Microsoft proprietary

Browser supportNone — no browser supports WMA natively

WebRTC / VoIPNot included in any WebRTC codec negotiation

WMA files cannot be played on the web without a server-side conversion step or a custom JavaScript decoder.

Opus: The IETF Standard for Internet Audio

Opus was developed jointly by Mozilla and Skype (Microsoft), standardized by the IETF as RFC 6716 in 2012, and is now maintained by the Xiph.Org Foundation. It was designed specifically for internet audio: low latency, high quality across the full bitrate range from 6 kbps to 510 kbps, and excellent handling of both speech and music within the same stream. Opus is mandatory in WebRTC, native in all major browsers, and the default codec for Discord, WhatsApp, Zoom, and YouTube.

TypeLossy compression, open-source (RFC 6716)

Bitrate range6 kbps to 510 kbps; transparent music at ~96 to 128 kbps

Browser supportChrome, Firefox, Edge, Safari, Opera — all major browsers

Opus is the only codec that is both mandatory in WebRTC and natively supported by all five major browsers.

Quality: Opus vs WMA at Equivalent Bitrates

Opus outperforms WMA in standardized listening tests at every bitrate where comparisons have been made. At 64 kbps, Opus produces music quality that WMA requires 128 kbps to match. At 96 kbps, Opus is near-transparent for most music content. At 128 kbps, it is effectively transparent for all content types including high-frequency material like cymbals and transients. Both are lossy formats, so converting WMA to Opus applies a second encoding pass, but the resulting Opus file at a high bitrate is generally comparable in perceived quality to the source WMA.

Opus at 64 kbpsComparable to WMA at 128 kbps for most music content

Opus at 128 kbpsEffectively transparent for virtually all listeners

Speech qualityOpus at 24 kbps matches or exceeds WMA at 64 kbps for voice

Keep the original WMA files. The quality ceiling is set by the original WMA encoding and cannot be recovered in the Opus output.

When Opus Is the Right Destination from WMA

Opus is the right format when the audio needs to work in a web application, a WebRTC pipeline, a Discord bot, a browser game, or any modern streaming context. It is also the best choice for mobile audio assets where bandwidth and file size matter. For the broadest hardware compatibility including car stereos and legacy devices, MP3 remains the safer choice. For Apple Music import and iPhone sync, AAC in an M4A container is more practical. Opus is the right answer for the internet.

Use Opus forWeb audio, WebRTC, Discord, streaming, browser games, mobile assets

Use MP3 forCar stereos, legacy hardware, universal sharing

Use AAC/M4A foriPhone, Apple Music, iTunes

Our converter uses FFmpeg to decode WMA and re-encode as Opus, producing an IETF-standard audio file ready for any modern web or streaming pipeline.

Benefits

Why Convert WMA to Opus

🌐

Native in Every Browser

Opus plays natively in Chrome, Firefox, Edge, Safari, and Opera without any plugin. WMA has zero browser support.

📡

The Codec of Discord, YouTube, and Zoom

Opus is the mandatory codec for WebRTC and the default for every major real-time communication platform. Converting to Opus makes audio ready for the modern web stack.

🎯

Better Quality at Lower Bitrates

Opus outperforms WMA, AAC, and MP3 at equivalent bitrates in standardized listening tests — delivering more quality for less bandwidth.

⚡

Fast Conversion

Most WMA files convert to Opus in under 30 seconds on dedicated FFmpeg servers.

Who Uses It

Who Converts WMA to Opus

Web developers integrating audio into browser apps, Discord bot developers, streamers updating legacy audio libraries, game developers building web or mobile audio pipelines, and anyone migrating a WMA archive into a modern, web-compatible format.

Web developers, Discord users, streamers, and game developers converting WMA to Opus

Web Developers Integrating Audio into Browser Apps

Web applications that need to serve audio to users in a browser benefit from Opus over WMA for two reasons: WMA is not supported by any browser natively, and Opus achieves significantly better compression efficiency for the same perceived quality. Converting a WMA audio library to Opus removes the conversion overhead from the server pipeline and lets browsers decode audio directly.

Discord Bot and Application Developers

Discord transmits voice audio using Opus internally. Discord bots that play audio through voice channels often need to provide audio in a format that can be piped to Opus with minimal re-encoding. Converting WMA source files to Opus ahead of time reduces the bot's runtime processing overhead and ensures clean audio output without intermediate format conversions.

Discord audioOpus is the native codec for Discord voice channels and bots

Streamers Updating Legacy Audio Libraries

Streamers who have accumulated background music or sound effects in WMA format from older Windows systems can convert their entire library to Opus. Opus files work in OBS Studio, Streamlabs, and every modern streaming tool, and produce smaller files that load faster into streaming software without any quality penalty at high bitrates.

Game Developers Building Web or Mobile Audio Pipelines

Browser games using the Web Audio API and mobile apps targeting Android can use Opus natively. Converting WMA game audio assets to Opus produces files that play in-browser without a codec plugin and that Android MediaPlayer handles natively. The smaller file sizes also reduce game download and asset loading times.

VoIP and Real-Time Communication Developers

WebRTC mandates Opus support from all conforming implementations. Applications built on WebRTC, Twilio, Agora, or any other real-time communication platform that need to replay recorded WMA audio within the same pipeline benefit from converting to Opus first, avoiding a cross-codec transcoding step at runtime.

Archivists Migrating WMA Libraries to a Modern Format

Organizations or individuals with large WMA audio archives from Windows Media Player or Zune can migrate to Opus for long-term storage and future compatibility. Opus is an open IETF standard with broad open-source toolchain support, making it a more durable archive format than the proprietary WMA codec.

Converts using FFmpeg on dedicated servers.

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Frequently Asked Questions

What makes Opus better than WMA for web audio?

WMA has no browser support — no browser can play WMA natively. Opus is supported by Chrome, Firefox, Edge, Safari, and Opera, and is the mandatory codec for WebRTC. Opus also achieves better quality at lower bitrates than WMA, meaning web apps can serve smaller Opus files that sound better than equivalent WMA files and play without any server-side transcoding at runtime.

Does Discord use Opus?

Yes. Discord uses Opus for all voice channel audio transmission. Discord bots that stream audio to voice channels send audio as Opus. Converting WMA source files to Opus ahead of time avoids the need for runtime conversion in the bot's audio pipeline and produces cleaner output since one fewer transcoding step is involved.

Does converting WMA to Opus reduce audio quality?

Yes, slightly. Both WMA and Opus are lossy codecs, so the conversion applies a second encoding pass on top of the original WMA compression. Using a high Opus output bitrate (128 kbps or above) minimizes the additional degradation to a level that is not noticeable in most listening conditions. The quality ceiling is set by the original WMA encoding.

Does Safari support Opus?

Yes, since Safari 15 (released 2021), Safari on macOS and iOS supports Opus via the HTML5 Audio API and Web Audio API. All five major browsers now support Opus natively, making it a universally safe choice for web audio delivery.

Can Opus files be used in WebRTC applications?

Yes. Opus is the mandatory audio codec in the WebRTC specification (RFC 7874). All conforming WebRTC implementations must support Opus. Applications built on WebRTC, Twilio, Agora, Jitsi, or any standards-compliant real-time communication platform can use Opus audio directly without any additional codec negotiation.

Is there a file size limit?

The upload limit is 100 MB per file. Most WMA audio files are well within this limit.

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Upload your WMA file above and get a modern, web-ready Opus file in seconds.