How to convert FLAC to Opus
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert FLAC to Opus
NexMedia converts FLAC to Opus on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About FLAC
FLAC (Free Lossless Audio Codec) compresses audio without losing anything: the files are typically half to two thirds the size of WAV and decode back to the exact original samples.
Music archives, CD rips and high-resolution downloads.
FLAC files are several times larger than MP3, and some older players and car stereos do not play them.
Convert FLAC to Opus online free, no account required — Opus is a modern open lossy codec for speech and music.
Change FLAC to Opus without losing quality — convert FLAC to Opus free in your browser.
Why would anyone use FLAC when MP3 is so much smaller? FLAC stores the audio bit-for-bit with no loss at all, which matters for archiving and re-editing — the price is a file several times larger.
About Opus
Opus is an open, royalty-free lossy audio codec standardised by the IETF in 2012 (RFC 6716). It handles both speech and music well, from very low to high bitrates.
Voice and video calls, WhatsApp voice messages, WebRTC, and the audio track of WebM videos.
Opus always decodes at 48 kHz, and some older players and devices do not support it.
Why convert voice recordings to Opus? It stays clear at very low bitrates, so calls and dictation shrink dramatically without becoming hard to understand.
What changes when you convert FLAC to Opus
- The audio is decoded and re-encoded as Opus at the default settings, so the result is close to the FLAC but not bit-identical.
- Opus uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
Settings you can change
Before you convert FLAC to Opus, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted Opus file is kept for 2 hours, then deleted.
FLAC to Opus: questions and answers
Does converting FLAC to Opus reduce quality?
The audio is decoded and re-encoded as Opus at the default settings, so the result is close to the FLAC but not bit-identical. Opus uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
What is the difference between FLAC and Opus?
FLAC is a lossless compressed audio format. Opus is a modern open lossy codec for speech and music.
Can I change the settings when converting FLAC to Opus?
Before you convert FLAC to Opus, you can adjust: Audio codec, Rate control, Audio bitrate, Quality (VBR), Sample rate, Channels, Normalize loudness, Trim start, Trim duration, and Keep tags.
Do I need an account to convert FLAC to Opus?
No. You can convert FLAC to Opus without an account; signing in raises the file-size and daily limits.
How long is my converted Opus file kept?
The Opus file you convert from FLAC is kept for 2 hours, then deleted automatically.
Will the Opus file be smaller than my FLAC?
Opus uses lossy compression: the encoder discards the detail that is least noticeable, so the file is smaller than the FLAC but cannot be turned back into the original.
When I convert FLAC to Opus, is the audio re-encoded?
The audio is decoded and re-encoded as Opus at the default settings, so the result is close to the FLAC but not bit-identical.