Convertir Audio a MP3

Hey Indie Hackers 👋

I’ve been slowly turning Convertir Audio a MP3 into a small toolbox for people who need to clean up and share audio from their phone or laptop.

Here are all the tools in one place:

• Main audio → MP3 converter
  Convertir Audio a MP3 (spanish)

  Convert audio to MP3 (english)
  Convert OPUS / AMR / M4A / OGG / WAV / AAC / 3GP (and more) to MP3 directly in the browser. No account, mobile-friendly.

• Video / YouTube → MP3 (with permission)
  Convert video to MP3

  Upload a video file or paste a YouTube URL only if you have rights/permission and get an MP3 at 64k / 128k / 192k.

• Simple trim for MP3 & other audio (mobile-first)
  Trim audio on mobile
  Designed so you can cut the beginning/end of a WhatsApp voice note or recording from your phone and save just the useful part.

• Mix Audio online (mobile-first)
  Mix and merge audio on mobile

  Mix and merge multiple audio clips from your phone, with a simple UI and optional crossfade between tracks.

On top of that, the site also includes:

• MP3 compression (make files smaller while keeping them understandable).

• Audio transcription to text (for notes, interviews, meetings).

• A small mixer to join clips with crossfade transitions.

• Guides for converting WhatsApp / Telegram voice notes to MP3 and moving them to PC.

All files are processed server-side and automatically deleted after a short period – I built this mainly for my own workflow and then opened it up for everyone.

If you try any of the tools and something breaks, I’d love feedback so I can fix/ship improvements. 🙏