MIDI to MP3 Converter

Conversion, preview and download are free and use no credits, but sign-in is required to render. You can select a file and sound first. After signing in in the same tab, your selection is restored; click Render MP3 to continue. Free does not mean registration-free.

Yes. Choose either extension in this browser tool, select Piano or Strings, then render and download. No desktop music software is required. The file must contain standard type 0 or 1 MIDI with PPQ timing. Renaming another file to .mid or renaming MIDI to .mp3 does not convert its contents.

This tool offers lightweight synthesized piano and strings, not sampled acoustic instruments. Piano is useful for checking notes and rhythm, but it will not reproduce a recorded grand piano. For a realistic performance, render with your preferred sampled instrument in a DAW. Judge sound by listening, not by the MP3 bitrate alone.

Yes. Choose a sound before rendering, then play the completed MP3 in the page player before saving it. To compare piano and strings, render each separately. One sound applies to every pitched track. Changing the sound clears the previous result, so download any version you want to keep first.

Note timing, tempo changes and velocities are preserved. Original instrument assignments are replaced by your chosen sound; sustain pedal, pitch bend and effects are not reproduced. Files with drum notes on channel 10 are rejected, rather than silently losing percussion. Export a pitched-only MIDI, or render the full arrangement in its original DAW.

MIDI stores performance instructions, not the sound of the instrument that originally played them. A different synthesizer changes attack, sustain and tone even when the notes stay the same. This converter also uses one sound for all tracks. To match your original mix, use the same instruments and effects that created it.

No. This version has two built-in synthesized sounds: piano and strings. It does not load custom SoundFonts, sampled libraries or per-track instruments. For an orchestral mockup or a specific piano library, use a MIDI player or DAW that supports your chosen sound source.

Output is fixed at 192 kbps, 44.1 kHz, mono MP3. There is no 320 kbps, stereo or WAV option. MP3 is convenient for listening and sharing; choose a lossless WAV export in your music software when you need audio for further production. Increasing bitrate would not make a synthesized instrument more realistic.

Each MIDI can be up to 2 MB and 5 minutes, with at most 32 tracks and 10,000 notes. Combined note duration must stay within 30 minutes: overlapping notes each count toward that total. The output adds a short release tail. Split longer or denser arrangements in your MIDI editor before converting.

Yes. MIDI parsing, sound synthesis and MP3 encoding happen in your browser. Neither file is sent to our servers for conversion or saved in your account library. The server checks your login. For sign-in recovery, your selection is temporarily kept in this tab’s session storage and removed from that storage after restoration.

Open this page in your phone’s browser, choose a MIDI from your files, sign in and render. Use the player to check the result, then download it. Keep the tab open during conversion. Browser support and available memory vary; if rendering fails on your phone, try a smaller MIDI or a desktop browser.

No. Convert one file at a time and download its result before choosing the next file. Selecting another file clears the current audio. There is no batch queue or automatic account storage, so save each MP3 to your device before leaving or refreshing the page.

Check the player volume and confirm that your source contains playable notes. Empty MIDI files and drum tracks are rejected. Missing instrument colors may reflect the single-sound rendering, rather than missing notes. If conversion fails, check the file limits, retry with a short pitched passage, then try another browser. Keep your original MIDI for comparison.