Convert AVI to FLAC online for free and extract audio from video. Use this converter for music tracks, lectures, interviews, podcast source files, and listening without the video stream.
Converting AVI to FLAC extracts the audio track from the video and discards the visual frames. The result is typically 80–95% smaller than the source AVI file and is suited for music players, podcast apps, or further audio editing.
Max file size 10MB. Sign up for more.
| File Name | Size | Convert To |
|---|
Checking files and selected output formats.
| File Name | File Size | Download |
|---|
FLAC is lossless audio compression — ~50% the size of WAV with mathematically identical audio. The audiophile format of choice: Tidal HiFi and Amazon Music HD stream FLAC, and vinyl-rip communities archive in it. Convert to FLAC when your destination is critical listening on capable gear, or long-term archival of source recordings.
Pulling the soundtrack out of a video means dropping every video frame and keeping only the audio stream — smaller file, listen-only content.
Files up to 10 MB on the free plan, up to 1 GB on Pro — enough for lecture recordings, music videos, podcast video versions, and screen captures. Long videos (hour-plus) need Pro because the audio track alone can push past the free ceiling.
For voice content (interviews, lectures, podcasts), 128 kbps FLAC is more than enough. For music, aim higher — 192 kbps for casual listening, 320 kbps if you want transparency to the source. The source can't go higher than it already is; if the video's audio was already 128 kbps AAC, exporting at 320 kbps just makes a bigger file.
Extraction is fast — a 30-minute video typically produces its FLAC in a few seconds. Both the video you uploaded and the extracted audio are permanently deleted from our servers within 30 minutes.
A AVI container holds separate video and audio streams. Extraction reads the audio stream, re-encodes it (or copies it, if the target codec matches) into your chosen FLAC container, and throws away the video entirely. Metadata like title and track info carry over where the format supports it.
Six scenarios where extracting audio to FLAC solves a real problem.
A recorded lecture, webinar, or class captured as AVI carries hours of good audio and a static talking head. Extracting to FLAC produces something you can listen to on a commute — much smaller, playable on any audio app.
For music videos of tracks you own, extracting the FLAC lets you add the song to your regular listening rotation without needing to keep the video around. (Do keep an eye on rights — extraction from third-party sources isn't a licence.)
Recording a video interview and then distributing the audio-only version to podcast platforms is standard practice. Extracting to FLAC gives you the podcast episode without touching the video edit.
Whisper, Otter, and every other transcription service accept audio directly. Uploading video wastes bandwidth and, in some cases, is rejected outright. Extract to FLAC first, upload, get the transcript back in a fraction of the time.
Sound effects and short clips extracted from videos become FLAC files ready to import into audio editors, DAWs, or ringtone makers. Video is unnecessary baggage for these use cases; extracting saves the round-trip.
A 1 GB AVI lecture recording carries maybe 60 MB of actual audio. If the video track is disposable — say, a talking head — extracting to FLAC cuts storage by 90% while preserving the content that matters.
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | AVI | FLAC |
|---|---|---|
| Full name | Audio Video Interleave | Free Lossless Audio Codec |
| Year introduced | 1992 | 2001 |
| Developer / standard body | Microsoft | Xiph.Org |
| MIME type | video/x-msvideo | audio/flac |
| File extension | .avi | .flac |
| Compression | Codec-dependent (DivX, XviD, MJPEG) | Lossless |
| Color / data depth | Codec-dependent | N/A (audio) |
| Max dimensions / size | Codec-dependent | 8 channels × 32-bit × 192 kHz |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | Microsoft RIFF | Xiph.Org FLAC |
| Best for | Legacy video files, archival | Audiophile listening, lossless music archives |
AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992 as part of its Video for Windows technology. It is one of the oldest video container formats still encountered today. AVI uses a straightforward structure where audio and video data are interleaved — stored in alternating chunks — allowing simultaneous playback of both streams. Its simplicity made it a dominant format throughout the 1990s and early 2000s.
While AVI benefits from broad legacy support and a simple, well-understood structure, it lacks many features expected in modern video formats. It has no native support for streaming over the internet, cannot embed modern subtitle formats or chapter markers, and its compression efficiency depends entirely on the codec used. AVI files also tend to be larger than equivalent MP4 or MKV files. The format is being gradually replaced by MP4 and MKV in virtually all use cases, though it still appears in older video archives and some legacy industrial systems.
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert AVI files to FLAC.
Read practical guides about extracting audio from video, choosing output formats, and handling media compatibility.
PowerPoint to PDF freezes your deck into read-only pages. Here's what actually survives (animations don't) and how to compensate.
That two-hour lecture recording as MP4 is unlistenable on the train. Convert it to MP3 to strip the video and keep just the audio you actually need.
iPhone videos in MOV won't play on Android or in WhatsApp status. Here's how to convert to MP4 — plus what to expect on file size and quality.
iPhone HEIC photos that Windows can't open — here's the fastest way to convert them to JPG without installing anything, plus the workarounds that actually work.
A practical guide to converting FLAC to MP3 — covering optimal bitrate settings for maximum quality, batch conversion methods, and the best free tools for Windows, Mac, and online.
A complete guide to creating favicons for your website — covering ICO, PNG, and SVG formats, required sizes, HTML implementation, and free tools to generate favicons from any image.
