Opus to MP3 converter
Upload a Opus, get a polished MP3 back in seconds. StandardsPDF handles the conversion in your browser so your files stay yours.
Convert Opus 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
Works in any modern browser – desktop, tablet or phone
Free to try with no account and no watermark
How it works
Convert Opus to MP3 in 3 steps
Upload or drag in your Opus 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 Opus to MP3?+
Upload your Opus 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 Opus to MP3 free?+
Yes. Opus 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 Opus?+
StandardsPDF aims for the highest fidelity the MP3 format allows, so your audio file comes through looking as close to the original as possible. Some format-specific details may adapt where MP3 works differently to Opus.
Can I choose the bitrate when converting Opus 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 Opus to MP3 conversion.
Do I need to install anything to convert Opus to MP3?+
No. Converting Opus to MP3 runs entirely in the browser – no desktop software, no extensions and no account for the free tier.
What is the maximum Opus file size I can convert to MP3?+
Up to 100 MB per Opus on the free tier and 2 GB on Pro. If your Opus is larger, split it first or upgrade for the higher limit.
Can I convert several Opus files to MP3 at once?+
Yes – add multiple Opus files and StandardsPDF processes them as a batch, returning a MP3 for each.
Can I convert Opus to MP3 on my phone?+
Yes – the Opus to MP3 converter is fully responsive and works in Safari, Chrome and other modern browsers on iOS, Android and iPadOS.