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Mario Cepeda
Palencia, Spain
Full-stack web developer focused on building practical web tools, automation and media-processing solutions. Creator of ConvertirAudioaMP3, a free online toolkit for audio conversion, compression, trimming, merging and transcription. I mainly work with Python, FastAPI, JavaScript, React and web technologies.
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35.3
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Top 10
OpenEdge ABL
Developer
Spain
Highest experience points: 0 points,
0 activities in the last year
JavaScript
14.1
exp.
Python
9.2
exp.
JSON
4.6
exp.
HTML
1.8
exp.
CSS
1.2
exp.
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ConvertirAudioaMP3
Aug 2025 - Present
ConvertirAudioaMP3
Free online audio toolkit to convert audio files to MP3, compress MP3 files, trim and merge audio, transcribe recordings, and work with formats such as OPUS, OGG, M4A, WAV, AAC and AMR. No signup or software installation required.