Is this AVI 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 AVI 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.

If the AVI has MP3 audio, is the FLAC output truly lossless?

No — FLAC stores the decoded MP3 samples without further loss, but cannot undo the MP3 codec's original compression. The FLAC quality is limited by the AVI's audio quality.

For what purpose would I convert AVI audio to FLAC?

Archiving, hi-fi playback compatibility, and delivering audio to tools that require FLAC (certain network streamers, audiophile players). If the AVI contained high-quality uncompressed or PCM audio, the FLAC output will be excellent.

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.

AVI to FLAC Converter — Free, Online, No Upload

How to convert AVI to FLAC online

1
Drop your AVI file
Drag and drop your Audio Video Interleave 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 Audio Video Interleave → 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.

AVI vs FLAC: format overview

AVI

Audio Video Interleave

Microsoft · 1992

Compression: lossy
Transparency: No

✓ Universal Windows compatibility
✓ Simple container format — widely supported
✗ Large file sizes (minimal compression)

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

AVI magic bytes: 52 49 46 46 xx xx xx xx 41 56 49 20

FLAC magic bytes: 66 4C 61 43

Why convert AVI to FLAC?

AVI files that came from high-quality capture cards or lossless recording setups sometimes carry uncompressed PCM audio — but that quality is invisible once the file is sitting in an AVI container that audiophile software, music servers, and archival tools often refuse to parse. Getting that audio into a proper lossless format is necessary before it can be used in serious audio workflows.

FLAC is the standard for lossless audio archiving. It compresses audio with no quality loss — every sample is preserved exactly — while reducing file sizes by 40–60% compared to raw WAV. Plex, Jellyfin, Kodi, foobar2000, and Audirvana all support FLAC natively. It is the format of choice for music collectors, archivists, and anyone running a high-quality home audio server.

Extracting audio from AVI to FLAC is straightforward: if the AVI contains uncompressed PCM, the FLAC output is a mathematically perfect copy in a better container. If the AVI uses a lossy codec like MP3, the FLAC output preserves that signal without further degradation, but does not restore quality the original compression removed. FLAC files are large compared to MP3 or AAC but far more appropriate for archival use. This is the right choice when you want audio you never have to convert again.

Quality & file size: AVI to FLAC

Typical file sizes: AVI 200–600 MB → FLAC 20–40 MB.

Converting from lossy AVI to lossless FLAC will not recover detail the AVI 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: AVI supports standard color, FLAC supports standard color.

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

Frequently asked questions

Privacy: how FormatDrop handles your files

Your AVIfiles 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.