Convert OPUS to FLAC
Preserve an Opus recording exactly as it sounds today, in a compressed lossless file with proper tags. Your audio is processed in this tab and never touches a server.
Why convert OPUS to FLAC?
Opus is the format your voice notes already live in: it is what WhatsApp uses for voice messages and what Discord uses for calls, small and lossy by design. FLAC is the opposite kind of file, compressed but lossless, with rich tag support for names, dates, and notes, which is why archives rely on it. People make this conversion when a recording matters more than the app it came from: a grandparent's voice note, an interview for a family history project, an oral history session captured over Discord. Converting to FLAC cannot bring back detail Opus already discarded, but it preserves exactly what you have now, bit for bit, so the recording never degrades again as apps and formats change. If it is a voice you want to still have in twenty years, FLAC is the safe place to keep it.
Quality and file size
One honest caveat: FLAC is lossless from this point forward, but it cannot bring back anything the original Opus encode discarded. The FLAC will sound identical to your .opus file, not better, and it will be several times larger, since Opus is extremely efficient and FLAC keeps every decoded sample. What you buy is the future: the file can be copied, edited, and converted again without new generation loss, and it stays bit-exact at roughly half the size of an equivalent WAV. For recordings you cannot re-record, that is the property that counts.
OPUS to FLAC: common questions
If FLAC is lossless, does that mean my recording gets restored to full quality?
No. Lossless means no further loss from here on, not recovery of what Opus already discarded. The FLAC captures the current state of the recording exactly, and it will never sound better or worse than the .opus does today.
Why choose FLAC over WAV for archiving?
They hold identical audio, but FLAC is roughly 40 to 50 percent smaller and supports proper tags for names, dates, and descriptions. Across years of saved voice notes, that difference adds up fast.
Do you keep a copy of the files I convert?
No. The conversion runs entirely on your device through FFmpeg compiled to WebAssembly, so nothing is uploaded and there is no server copy. We never see your audio, store it, or train on it, which matters when the file is a private voice message.
Should I delete the original .opus files after converting?
Keep them. The .opus original is tiny next to the FLAC, so holding onto both costs almost nothing, and the FLAC alone already stores everything the decoded recording contained if you ever lose one.
Who makes this?
We're the small team behind Xport Studio, a private, fully offline app for AI vocals, stems, and mastering. These free tools are side experiments we wanted to share. No upsell, but if you're curious about the bigger thing, take a look.