Step 1: Upload your MP3 files using the button above or by drag and drop.
Step 2: Click the 'Convert' button to start the conversion.
Step 3: Download your converted MKV files.
MP3 to MKV Conversion FAQ
Why would I convert MP3 audio to a MKV video?
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A MKV video plays everywhere a raw MP3 sometimes will not — most notably on video-only platforms and social feeds that require a video container. It is the standard way to publish a podcast, song, or mix as a shareable MKV.
Can I batch-convert many MP3 files to MKV?
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Several files in one job need a paid plan. Free use is one file per conversion, one conversion an hour. On a paid plan you can add several files to one job, then download each result on its own or all of them in one ZIP.
Is the MP3 to MKV conversion free?
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Yes, within the free size limit. PRO unlocks much larger MP3 uploads, longer durations, and parallel jobs.
How long can the MP3 be?
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Full-length albums and multi-hour MP3 recordings convert fine. Because the picture is static, even a long MKV stays modest in size relative to a filmed video of the same length.
Will the MKV play on YouTube, Instagram, and TikTok?
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Yes. PDF.to encodes the MKV with a widely supported codec and pixel format, so the resulting video uploads cleanly to the major platforms that reject bare MP3 audio.
Are my MP3 files private during conversion?
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Yes. Uploads travel over HTTPS, nobody reads the contents, and nothing is shared. Your uploaded MP3 and the resulting MKV are deleted from our servers automatically about 24 hours after the conversion, which leaves time to download the result.
