Convert WebM to MP3 Online — Extract Audio in Seconds
Rip audio tracks from web videos in seconds.
Drop up to 50 videos at once — no install, no sign-up required.
Drop WebM Videos Here
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How it works
- 1 · Drop your videos
Drag & drop or choose WebM 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.
WebM is an open, royalty-free video format launched by Google in 2010 as part of the WebM Project. Based on the Matroska container, WebM pairs VP8, VP9, or AV1 video with Vorbis or Opus audio (typically 64-160 kbps). The format was designed specifically for HTML5 video delivery, offering efficient compression without patent licensing fees. Opus audio, in particular, achieves excellent quality at low bitrates—often matching MP3 quality at half the file size.
Learn more: WebM on Wikipedia
WebM files are commonly encountered from YouTube downloads (youtube-dl, yt-dlp), screen recorders, and web-based video tools. YouTube uses WebM as one of its primary delivery formats, making it a frequent source for audio extraction. While Chrome, Firefox, and Edge play WebM natively, other devices may lack support—extracting to MP3 or WAV ensures universal compatibility.
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 WebM to MP3 conversion?
Will I lose audio quality converting WebM to MP3?
How long does WebM 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 WebM videos?
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 WebM 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 WebM to MP3
Latest improvements to this converter
Initial release of WebM to MP3 converter for high-quality audio extraction.