Turn AAC audio into MP3s that play on any device. Drop in an .aac or AAC-in-M4A file — an Apple export, a YouTube rip you own, a broadcast recording — and Solmi re-encodes it as a standard MP3 right in your browser. No upload, no signup, no watermark.
Drop the AAC onto the converter and press Convert. Solmi decodes it with your browser's AAC codec, re-encodes the audio as MP3, and returns the finished file for playback or download — with nothing uploaded.
AAC is the newer of the two and is generally more efficient — an AAC file usually sounds a little better than an MP3 of the same size. MP3 wins on reach: it plays on effectively every device, upload form, and piece of software in existence, which is normally why people convert.
Nearly. AAC is the codec; M4A is the MP4 container that most often holds it. A .m4a file usually contains AAC audio, and both convert here — if your file has an .m4a extension, the M4A to MP3 page is the same tool with the same result.
A little, since one lossy format is being re-encoded into another. Using 192 kbps or higher keeps the second-generation loss below the threshold most people can hear on ordinary playback equipment.
No. The converter runs entirely in your browser: your file is decoded and re-encoded on your own device, and nothing is sent to a server. That is also why it is fast — there is no upload wait and no download wait, just the conversion itself.
Yes, completely free with no signup, no file-size paywall, and no watermark. Once your audio is converted, you can turn the track into a music video with Solmi's AI music video generator — also free to start.