MKV to MP3 converter
Convert MKV to MP3 online for free, with the layout and quality you'd expect from a desktop app but none of the setup.
Convert MKV to MP3
Drop your files to try StandardsPDF. This tool is available in the full workspace.
Preserves bitrate and channels for clean playback
Handles long recordings and full albums in one job
Downloads a ready-to-use MP3 you can share immediately
Files auto-deleted from our servers within 60 minutes
How it works
Convert MKV to MP3 in 3 steps
Upload or drag in your MKV file
Choose your output options if you need them
Download the finished MP3
Private by default
Files are encrypted in transit and deleted within 60 minutes.
Fast
Most jobs finish in under 10 seconds. No queueing.
No signup on free tier
5 documents per day, no credit card required.
FAQ
Frequently asked questions
How do I convert MKV to MP3?+
Upload your MKV file (or drag it onto the box above), wait a few seconds while StandardsPDF converts it in your browser, then download the MP3. There is nothing to install and no account required.
Is converting MKV to MP3 free?+
Yes. MKV to MP3 conversion is free on the StandardsPDF free tier – no watermark, no signup, and no credit card. A Pro tier lifts the file-size and daily limits if you need more.
Will the MP3 keep the quality of my MKV?+
StandardsPDF aims for the highest fidelity the MP3 format allows, so your video comes through looking as close to the original as possible. Some format-specific details may adapt where MP3 works differently to MKV.
Can I choose the bitrate when converting MKV to MP3?+
On the free tier StandardsPDF picks a clean default bitrate for your MP3; Pro lets you set the exact bitrate and sample rate for the MKV to MP3 conversion.
What is the maximum MKV file size I can convert to MP3?+
Up to 100 MB per MKV on the free tier and 2 GB on Pro. If your MKV is larger, split it first or upgrade for the higher limit.
Can I convert several MKV files to MP3 at once?+
Yes – add multiple MKV files and StandardsPDF processes them as a batch, returning a MP3 for each.
Can I convert MKV to MP3 on my phone?+
Yes – the MKV to MP3 converter is fully responsive and works in Safari, Chrome and other modern browsers on iOS, Android and iPadOS.
How long does a MKV to MP3 conversion take?+
Most MKV files convert to MP3 in a few seconds. Larger or higher-resolution files take a little longer, but there is never a queue on the free tier.