MP3 to MIDI with SoundFont
Transcribe a recording, then immediately hear it played back in a brand-new instrument voice.
- ✓Up to 50 MB per file · processed entirely in your browser
- ✓No sign-up, no watermark
- ✓Batch mode included
Conversion workbench
Add a file to begin
Drop files here or click to choose · Up to 50 MB per file · processed entirely in your browser
AUDIO/* .MP3 .WAV .AIF .AIFF .M4A .AAC .OGG
What is MP3 to MP3 rendering?
MIDI is instructions; this tool performs them. Choose a built-in instrument or load your own SF2/SF3 SoundFont, render everything offline in the browser, and download a share-ready MP3.
A MIDI file contains no sound at all — a player has to decide what a “piano” or a “strings” patch actually sounds like. Rendering loads real recorded instrument samples (a SoundFont), schedules every note of the file through them, and mixes the performance down to a finished audio file.
Choosing a SoundFont
A good general-purpose GM SoundFont covers every instrument a MIDI file might call for. For solo piano repertoire, a dedicated piano font usually beats a general one. SF3 files are simply SF2 files with compressed samples — same sound, smaller download.
How it works
- 1
Load a MIDI file
Any standard .mid or .midi, including files exported from this site or your DAW.
- 2
Pick a voice
Use the built-in grand piano, or bring your own SF2/SF3 and pick any preset inside it.
- 3
Render and download
The whole performance is mixed offline at studio quality, then encoded to MP3 — no upload, no queue.
Formats & limits
Input: standard MIDI files (.mid/.midi, format 0 or 1), plus SF2 and SF3 SoundFonts up to 200 MB. Output: MP3 at 192–320 kbps. Rendering time scales with the length of the piece, not with your connection.
Highlights
Your own SoundFonts
SF2 and SF3 files load straight from disk; every preset inside is selectable.
True offline render
Audio is mixed in an offline context, so the export is bit-perfect and faster than realtime.
Instant audition
Preview the render in the page before you spend a single megabyte.
Frequently asked questions
The render itself is lossless digital audio; only the final MP3 encoding is lossy, and at 256–320 kbps the difference is inaudible in practice. Choose 320 kbps for archiving.
Yes — upload any SF2 or SF3 SoundFont and every preset inside becomes available in the instrument menu.
No. Decoding, synthesis and MP3 encoding all run in your browser. The MIDI and SoundFont never leave your device.
General MIDI assigns every part to a channel; files built for one instrument sound sparse through a piano. Try a multi-preset SoundFont or transpose parts to sit in a comfortable range.