This free online FLV to Opus converter lets you change flv video files into opus audio format right inside your web browser. There is nothing to install, no account to create and no watermark added to your result.
Unlike most converters, EverythingConverter never uploads your files to a server. The entire FLV to Opus conversion happens locally on your own device, which means your documents and media stay completely private and the process works even on slow connections.
How to convert FLV to Opus
- Click the upload area above or drag and drop your FLV file into it. You can also browse and pick a file from your device.
- EverythingConverter reads the file directly in your browser and starts to extract the audio as Opus automatically. Nothing is sent to any server.
- When the conversion finishes, your new Opus file downloads right away. You can convert another file at any time, completely free.
FLV and Opus explained
What is a FLV file?
FLV (Flash Video) was the standard for online video during the Flash era. Since Flash is gone, converting FLV to MP4 keeps old videos playable on modern devices.
What is a Opus file?
Opus is a modern, open audio codec built for both speech and music. It delivers outstanding quality at very low bitrates and powers voice chat in apps like Discord and WhatsApp.
Convert FLV to Opus on any device
You can convert FLV to Opus on Windows, Mac, Linux, Chromebook, Android and iPhone, straight from Chrome, Safari, Edge or Firefox. There is no app to install and no account to create. Because the conversion runs on your own device, it also works offline once the page has loaded, and you can convert as many files as you want.
Frequently asked questions
How do I convert FLV to Opus for free?
Upload your FLV file to the converter above and it will be turned into a Opus file automatically. The tool is completely free, with no limits on how many files you can convert and no watermark on the result.
Is it safe to convert FLV to Opus here?
Yes. EverythingConverter converts your FLV file entirely inside your browser. Your file is never uploaded to a server, so no one but you ever has access to it. This makes it one of the most private ways to convert FLV to Opus online.
Can I convert multiple FLV files at once?
Yes. You can drop or select as many FLV files as you like and they are all converted to Opus in one batch, then bundled into a single ZIP download. It is the fastest way to bulk convert FLV to Opus.
Do I need to install any software?
No. The FLV to Opus converter runs in any modern web browser on Windows, macOS, Linux, Android and iOS. There is nothing to download or install.
Is there a file size limit?
Because the conversion runs on your own device, the practical limit depends on your computer's memory rather than a server quota. Most everyday FLV files convert instantly, and there is no artificial cap.
How long does it take to convert FLV to Opus?
For typical files it is almost instant, since the conversion happens locally with no upload or download wait. Large media files take a little longer because your device does the encoding, but there is never a queue.
What is the difference between FLV and Opus?
FLV (Flash Video) was the standard for online video during the Flash era. Since Flash is gone, converting FLV to MP4 keeps old videos playable on modern devices. Opus is a modern, open audio codec built for both speech and music. It delivers outstanding quality at very low bitrates and powers voice chat in apps like Discord and WhatsApp. Converting FLV to Opus gives you the strengths of the Opus format for your specific use case.
Does this keep the video?
No. This tool extracts only the audio track from your FLV video and saves it as Opus. It is the perfect way to pull music or sound out of a video file.