Convert FLAC to OPUS online in seconds — free, with no sign-up. OPUS is lossy and ideal for voice, streaming and real-time audio. Your files are encrypted and deleted automatically after 24 hours.
FLAC
Free Lossless Audio Codec — Open-source lossless audio that's 40–60% smaller than WAV with zero quality loss.
How to convert FLAC to OPUS
- 1Upload your FLAC file
Click “Choose a file” or drag and drop your FLAC file onto the page — no sign-up or email needed.
- 2Convert to OPUS
OPUS is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your OPUS file
Your OPUS file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
FLAC vs OPUS
| FLAC | OPUS | |
|---|---|---|
| Full name | Free Lossless Audio Codec | Opus |
| Type | Audio | Audio |
| Compression | Lossless | Lossy |
| Best for | archiving and audiophile listening | voice, streaming and real-time audio |
Frequently asked questions
Does converting FLAC to OPUS lose quality?
FLAC is lossless and OPUS is compressed, so a small amount of data is discarded. We use a high-quality default, so the OPUS file sounds identical to the original to the human ear while being much smaller.
What's the difference between FLAC and OPUS?
Free Lossless Audio Codec (FLAC) is lossless and best for archiving and audiophile listening. Opus (OPUS) is lossy and best for voice, streaming and real-time audio. Convert FLAC to OPUS when you need a audio for voice.
Is the FLAC to OPUS converter free?
Yes — converting FLAC to OPUS is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my FLAC files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert FLAC to OPUS on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert FLAC to OPUS?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert FLAC files to?
Besides OPUS, you can convert FLAC to AAC, AIFF, M4A, MP3, OGG, WAV and more — see the full list of FLAC conversions below.
Other conversions
Last updated July 2026