Upload a FLAC file and get a OGG back. No signup, no watermark, no limit on how many.
FLAC compresses losslessly: it typically halves a WAV and gives back bit-for-bit the same audio when decoded. It is free, open, and widely supported outside Apple's world.
Where you run into it: Archived rips, Bandcamp and Qobuz downloads, anyone who keeps a music library they intend to still have in ten years.
What it costs you: Half of enormous is still large, and some hardware — car head units especially — will not touch it.
OGG here means Vorbis audio in an Ogg container — a patent-free lossy codec that generally beats MP3 at the same bitrate.
Where you run into it: Game audio, Wikipedia and Wikimedia files, Spotify's streaming internals, Linux desktops.
What it costs you: Technical merit never bought it consumer support: plenty of car stereos and older phones simply do not list it.
These two formats come from the same place — both are Xiph projects, both are free of patents, and both describe their metadata in the same language, Vorbis comments. That last detail is the practical one: your artist, album, date and everything else you have typed into a FLAC library maps straight across with nothing to translate and nothing to retype. Vorbis also carries whatever sample rate your FLAC had, so a 96 kHz file stays at 96 kHz rather than being resampled down to 48 the way MP3 would insist on.
Think of the FLAC as the archive and the Ogg as the copy that travels. The destinations are specific and mostly not consumer hardware: Unity and Godot both take Ogg directly and use it for music, Linux desktops and open-source audio tools prefer it, Wikimedia and other public archives accept it where they will not accept patent-encumbered formats, and Bandcamp offers it as a download option. The one place it does not go is Apple, which plays no Ogg at all — if an iPhone is anywhere in the plan, use M4A instead.
Yes, entirely, and there is no cap on how many files you convert. No account, no watermark, no trial.
Yes, since Vorbis is lossy and your FLAC was not. Best is a variable setting rather than a fixed rate, and Vorbis is at its strongest through the middle of the range where most music sits, so from a lossless source it holds up very well indeed. Because the FLAC survives untouched, the sensible approach is to encode once at Best, listen on whatever the file is actually for, and encode again higher if anything bothers you.
Around a fifth of the FLAC, and variable with the material rather than fixed — the encoder gives a dense passage what it needs and a sparse one much less. Resist comparing the resulting bitrate against an MP3's: Vorbis distributes its bits differently, so the same number means rather more here. A hi-res FLAC comes out larger than a CD-rate one, because unlike the MP3 route nothing about the sample rate is thrown away.
Yes — OGG is one of the formats this converter writes, so the reverse page exists at /ogg-to-flac/. Be clear about what comes back, though: the FLAC you get is a faithful copy of the OGG, not of the original. The loss happened on the way out, and returning to a lossless format stops further loss rather than undoing it. Keep the original FLAC if you still have it.
The file is uploaded to do the conversion — nothing here runs in your browser — and both your upload and the converted result are deleted the moment the file is sent back. Nothing is stored and nothing is logged beyond the request itself.