Is this OGG to FLAC converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple OGG files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

What bitrate will the converted audio use?

We default to 192 kbps for MP3, 128 kbps for OGG/Opus, and 320 kbps for M4A/AAC. These settings are perceptually transparent — most listeners can't tell the difference in a blind test.

Will my metadata (ID3 tags, album art) be preserved?

Yes, when both formats support it. Tags carry over on conversions like MP3→M4A or FLAC→MP3. WAV has limited tag support, so some metadata may not transfer.

Will my OGG files sound better in FLAC?

No — the OGG source's lossy encoding cannot be undone. FLAC stores the decoded OGG audio losslessly, but quality is capped by the source. The benefit is compatibility with devices that only read lossless formats.

My game's audio files are OGG but my audio editor needs FLAC — is this common?

Yes — many game engines output audio assets as OGG, and some professional audio editors (particularly for mastering and post-production) prefer or require FLAC input.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

OGG to FLAC Converter — Free, Online, No Upload

How to convert OGG to FLAC online

1
Drop your OGG file
Drag and drop your Ogg Vorbis file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Ogg Vorbis → Free Lossless Audio Codec entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your FLAC
Your Free Lossless Audio Codec file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

OGG vs FLAC: format overview

OGG

Ogg Vorbis

Xiph.Org Foundation · 2000

Compression: lossy
Transparency: No

✓ Royalty-free — no licensing fees
✓ Better quality than MP3 at same bitrate
✗ Not supported on iOS/Safari natively

FLAC

Free Lossless Audio Codec

Josh Coalson / Xiph.Org · 2001

Compression: lossless
Transparency: No

✓ Lossless compression — identical to source
✓ 50–60% smaller than WAV with no quality loss

OGG magic bytes: 4F 67 67 53

FLAC magic bytes: 66 4C 61 43

Why convert OGG to FLAC?

OGG Vorbis audio ends up in some unexpected places: game engines export it, some music tools default to it, and streaming services have historically distributed audio in OGG containers. When that audio needs to move into a professional audio editing context or be played on hi-fi hardware that only accepts lossless formats, OGG creates a compatibility wall. Audirvana, Roon, many hi-fi network streamers, and professional audio editors like Reaper and iZotope RX can struggle or refuse to open OGG files.

Converting OGG to FLAC solves the compatibility problem. FLAC is the universal lossless format that audiophile and professional software treats as a first-class citizen. The conversion stores the decoded OGG audio inside a FLAC container without any further encoding — no additional quality loss beyond what the original Vorbis compression introduced. Game developers who need audio assets from a game engine in a format suitable for audio editing or archiving also use this conversion regularly.

The honest caveat: the output FLAC will not be "truly lossless" in the original studio sense — it's a lossless wrapper around a lossy source. Quality is capped at the OGG original; you won't hear improvement over the source file. What you gain is the ability to open and process the audio in tools that require FLAC or WAV input, and to archive the audio in a format that won't introduce any further degradation if the file is re-exported later.

Quality & file size: OGG to FLAC

Typical file sizes: OGG 2–5 MB → FLAC 20–40 MB.

Converting from lossy OGG to lossless FLAC will not recover detail the OGG codec already discarded — but the output will not degrade any further. This is useful when you need a lossless format for editing or compatibility without additional compression artifacts.

Color depth: OGG supports standard color, FLAC supports standard color.

Transparency: OGG does not support transparency. FLAC does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your OGGfiles are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.