Is this WMV to OPUS converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple WMV files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

What bitrate will the converted audio use?

We default to 192 kbps for MP3, 128 kbps for OGG/Opus, and 320 kbps for M4A/AAC. These settings are perceptually transparent — most listeners can't tell the difference in a blind test.

Will my metadata (ID3 tags, album art) be preserved?

Yes, when both formats support it. Tags carry over on conversions like MP3→M4A or FLAC→MP3. WAV has limited tag support, so some metadata may not transfer.

What bitrate should I use for Opus output from WMV?

For speech/voice content, 32–48 kbps Opus is excellent. For music, 96–128 kbps. Opus at these bitrates often sounds better than the original WMA source at higher bitrates.

Is Opus a good long-term format for audio from WMV?

For streaming and web use, yes. For archiving, FLAC or WAV is better. Opus is ideal when you need small files with good quality for delivery, not long-term storage.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

WMV to Opus Converter — Free, Online, No Upload

How to convert WMV to OPUS online

1
Drop your WMV file
Drag and drop your Windows Media Video file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Windows Media Video → Opus Interactive Audio Codec entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your OPUS
Your Opus Interactive Audio Codec file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

WMV vs OPUS: format overview

WMV

Windows Media Video

Microsoft · 2003

Compression: lossy
Transparency: No

✓ Good compression for Windows-native workflows
✓ DRM support for content protection
✗ Not supported on macOS, iOS, Android natively

OPUS

Opus Interactive Audio Codec

IETF / Xiph.Org · 2012

Compression: lossy
Transparency: No

✓ Best low-bitrate quality of any audio codec
✓ Royalty-free and open standard (RFC 6716)

WMV magic bytes: 30 26 B2 75 8E 66 CF 11

OPUS magic bytes: 4F 67 67 53 (Ogg container)

Why convert WMV to OPUS?

Windows Media Video files carry audio encoded in WMA — a proprietary codec that is incompatible with virtually all modern communication platforms, streaming systems, and WebRTC infrastructure. If you need to repurpose audio from a WMV recording for use in Discord bots, voice-over-IP applications, or low-bandwidth streaming, WMA cannot get you there.

Opus is the codec that underlies modern real-time communication. Discord, WhatsApp, Zoom, and every WebRTC implementation use Opus because it achieves excellent audio quality at very low bitrates with minimal latency. At 48 kbps, Opus handles both speech and music better than MP3 at 128 kbps. It was designed specifically for network audio and handles packet loss gracefully.

Converting WMV audio to Opus decodes the WMA track and re-encodes it as Opus in an OGG container. This is the right path when you are feeding extracted audio into a streaming pipeline, a Discord bot, or any application built on WebRTC. Note that Opus has limited support on older hardware and legacy media players — it works natively in Chrome, Firefox, and Linux media players, but iOS requires iOS 11 or later and an Opus-aware app. For general listening, MP3 or AAC are safer picks.

Quality & file size: WMV to OPUS

Typical file sizes: WMV 50–150 MB → OPUS 1–3 MB.

Both WMV and OPUS use lossy compression. We transcode at high quality settings (equivalent to OPUS's recommended web quality) to minimize generational loss.

Color depth: WMV supports standard color, OPUS supports standard color.

Transparency: WMV does not support transparency. OPUS does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your WMVfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.