Convert FLAC to OPUS
Convert your FLAC audio files to OPUS directly in your browser.
How to convert audio in 3 steps
Choose a FLAC audio file.
Click convert to OPUS.
Download your OPUS audio.
Format descriptions
FLAC — FLAC is an open-source lossless audio format that compresses without losing quality, roughly halving file size. Ideal for audio archives.
OPUS — OPUS is a modern, open and royalty-free audio codec. It delivers excellent quality even at low bitrates, making it ideal for streaming, voice and podcasts.
Technical comparison: FLAC vs OPUS
Technical breakdown of the FLAC and OPUS specifications: compression, colour, transparency and animation support.
| Property | FLAC | Opus |
|---|---|---|
| Specification | FLAC (Free Lossless Audio Codec) | Opus (Opus Interactive Audio Codec) |
| Media type | Audio | Audio |
| Compression | Lossless · FLAC | Lossy · Opus (RFC 6716) |
| Color space / bit depth | 16/24-bit up to 192 kHz | 16-bit, 8-48 kHz |
| Transparency | Not applicable | Not applicable |
| Animation | No (static) | No (static) |
| Best for | FLAC is an open-source lossless audio format that compresses without losing quality, roughly halving file size. Ideal for audio archives. | OPUS is a modern, open and royalty-free audio codec. It delivers excellent quality even at low bitrates, making it ideal for streaming, voice and podcasts. |
What happens when converting FLAC to OPUS?
The FLAC data is decoded inside your browser with WebAssembly and re-encoded to the OPUS specification, so no file is ever uploaded to a server. Both formats rely on comparable compression, so file size and perceived quality stay in the same range.
Frequently Asked Questions
What is audio conversion?
Audio conversion changes an audio file from one format to another, for example from FLAC to OPUS, while keeping the audio content.
Are my audio files uploaded?
No. This tool processes audio files directly in your browser. Your audio files are never sent to a server.
Which audio formats are supported?
This tool converts FLAC audio files to OPUS, all in your browser.
Is it really free and unlimited?
Yes, the tool is completely free and you can convert as many audio files as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Which format will the result be in?
The converted file will always be in OPUS format, ready to download and use.
About the audio converter
Convert FLAC to OPUS audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
See also:
- Audio Converters
- Compress Audio OnlineCompress MP3, WAV, OGG, M4A, AAC, OGA, FLAC, ALAC, AIFF, OPUS, M4B and AC3 audio files online for free. Reduce the file size of your audio recordings while keeping good quality. Everything happens in your browser: audio files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert FLAC to MP3Convert FLAC to MP3 audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert FLAC to WAVConvert FLAC to WAV audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert FLAC to OGGConvert FLAC to OGG audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.