Convert AVI to MP3 Online — Extract Audio in Seconds
Rip audio tracks from legacy video files in seconds.
Drop up to 50 videos at once — no install, no sign-up required.
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How it works
- 1 · Drop your videos
Drag & drop or choose AVI files. No account required on Free-paid plans unlock bigger batches, higher limits, and priority queues.
- 2 · We extract securely
Audio extracted on our dedicated servers. Encrypted in transit & at rest. We never store filenames-only file types & sizes for accounting.
- 3 · Download & auto-delete
Grab your MP3 files in seconds. Files delete automatically after 1 hour. Delete anytime after downloading with one click.
AVI (Audio Video Interleave) is Microsoft's original video container format, introduced with Windows 3.1 in November 1992. One of the oldest digital video formats still in use, AVI stores video and audio in interleaved chunks for synchronized playback. The format supports virtually any codec combination—DivX, XviD, H.264 video paired with MP3, PCM, or AC3 audio. AVI's simplicity and wide codec support made it the dominant format for digital video throughout the 1990s and 2000s.
Learn more: AVI on Wikipedia
While largely replaced by MP4 for new content, millions of AVI files remain in personal archives, legacy systems, and older digital camcorder recordings. Many users have AVI files from the early internet era (DivX movie downloads) or old camcorders that they want to preserve. Modern devices and apps often reject AVI playback entirely, making audio extraction one of the most practical ways to preserve the content in a usable format.
MP3 (MPEG-1 Audio Layer III) revolutionized digital audio when it was standardized in 1993 by the Fraunhofer Society. Using psychoacoustic compression, MP3 removes audio frequencies that humans typically cannot perceive, achieving 10:1 compression or better while maintaining excellent subjective quality. MP3 supports sample rates from 8-48 kHz and 16-bit audio. At 256 kbps, most listeners cannot distinguish MP3 from the original source in blind tests.
Learn more: MP3 on Wikipedia
MP3 remains the most universally compatible audio format, supported by every music player, smartphone, computer, and web browser. While newer codecs like AAC and Opus offer marginally better compression efficiency, MP3's ubiquitous support makes it the safest choice for sharing audio. The format's patents expired in 2017, making it completely free to use without licensing concerns.
Frequently Asked Questions
What audio quality can I expect from AVI to MP3 conversion?
Will I lose audio quality converting AVI to MP3?
How long does AVI to MP3 conversion take?
What video formats are supported?
What happens to chapter markers and metadata?
How long can my videos be?
Why extract audio from legacy AVI files?
Is stream copy mode automatic?
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 50 MB | 50 files | 3 at once |
| Pro | 500 MB | 200 files | 6 at once |
| Business | 2048 MB | 1000 files | 10 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all images converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 1 credit per 5 minutes
How it works:
- Files up to 5 minutes: 1 credit (minimum)
- 6-10 minutes: 2 credits
- 11-15 minutes: 3 credits
- 16-20 minutes: 4 credits
Example: A 10-minute file = 1 credit. A 180-minute (3h) audiobook = 36 credits.
Why per-minute? Audio conversion time scales with content duration, not file size. Longer audio requires proportionally more processing.
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Daily Limit | Monthly Limit |
|---|---|---|
| Free | 50 credits/day | — |
| Pro | — | 10,000 credits/month |
| Business | — | 30,000 credits/month |
Daily credits (Free tier, including guests) reset every day at midnight UTC. Monthly credits (Pro & Business) reset on your billing cycle date.
Note: With 1 credit per 5 minutes, video files under 5 MB cost 1 credit each. Pro users can convert 10,000 video files per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why are conversions so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I process files in bulk?
- Why did my file fail to convert?
- Do you use my files to train AI?
Choose Your Plan
Limits shown for AVI to MP3 conversion. One subscription unlocks the entire Tools.FAST Network. Plans cover Convert.FAST, Compress.FAST, PDF.FAST (soon), and all future tools.
Free
For occasional personal use
- 50 MB per file
- 50 files per batch
- 3 parallel conversions
- 50 credits/day
- Standard priority
- Email support
No sign-up required. Create an account for your own credit pool.
Pro
For independent work
- 500 MB per file
- 200 files per batch
- 6 parallel conversions
- 10,000 credits/month across Tools.FAST
- High priority
- Email & chat support
- One subscription for the entire Tools.FAST network
Business
For production scale
- 2 GB per file
- 1000 files per batch
- 10 parallel conversions
- 30,000 credits/month across Tools.FAST
- Add seats to invite team members
- Highest priority
- Priority email & chat support
- One subscription for the entire Tools.FAST network
How Credits Work
- Usually 1 credit per conversion. Exact cost shown before you start.
- Credits refresh monthly on your billing cycle.
- Unused credits roll over, capped at your plan's monthly amount.
- One subscription, all sites. Works across Convert.FAST, Compress.FAST, and future tools.
What's New in AVI to MP3
Latest improvements to this converter
Initial release of AVI to MP3 converter for high-quality audio extraction.