How to convert Opus to FLAC
- 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 Opus to FLAC
NexMedia converts Opus to FLAC 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 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.
Convert Opus to FLAC online free, no account required — FLAC is a lossless compressed audio format.
Change Opus to FLAC without losing quality — convert Opus to FLAC free in your browser.
Why won't my car stereo or older phone play Opus files? The codec only became widespread in the last decade, and hardware that predates it usually decodes just MP3 — converting keeps the music compatible.
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.
Why convert CDs to FLAC instead of MP3? The copy is bit-for-bit identical to the original, so the archive never loses quality however often it is converted later.
What changes when you convert Opus to FLAC
- The audio is decoded and re-encoded as FLAC at the default settings, so the result is close to the Opus but not bit-identical.
- Opus is a lossy format and FLAC is not: the FLAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
Settings you can change
Before you convert Opus to FLAC, 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 FLAC file is kept for 2 hours, then deleted.
Opus to FLAC: questions and answers
Does converting Opus to FLAC reduce quality?
The audio is decoded and re-encoded as FLAC at the default settings, so the result is close to the Opus but not bit-identical. Opus is a lossy format and FLAC is not: the FLAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
What is the difference between Opus and FLAC?
Opus is a modern open lossy codec for speech and music. FLAC is a lossless compressed audio format.
Can I change the settings when converting Opus to FLAC?
Before you convert Opus to FLAC, 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 Opus to FLAC?
No. You can convert Opus to FLAC without an account; signing in raises the file-size and daily limits.
How long is my converted FLAC file kept?
The FLAC file you convert from Opus is kept for 2 hours, then deleted automatically.
Does converting Opus to FLAC restore the quality the Opus lost?
Opus is a lossy format and FLAC is not: the FLAC keeps the decoded Opus exactly, but it cannot restore detail the Opus compression already removed, and the file is usually larger.
When I convert Opus to FLAC, is the audio re-encoded?
The audio is decoded and re-encoded as FLAC at the default settings, so the result is close to the Opus but not bit-identical.