BPM-Finder.net

BPM-Finder.net is a web-based tool that analyzes the beats per minute (BPM) of audio files with high accuracy. It works by processing audio directly in your browser using the Web Audio API and machine learning models—your files never leave your device. The tool offers four analysis modes: single file upload for quick checks, batch processing for multiple files at once, tap tempo for manual rhythm input, and real-time microphone analysis for live audio. It supports common audio formats like MP3, WAV, FLAC, AAC, OGG, and M4A, with files up to 50MB each.

What sets BPM-Finder.net apart is its client-side processing pipeline that maintains user privacy while delivering professional-grade results. The system decodes audio locally, extracts rhythm features using Essentia.js, scores tempo candidates with a DeepRhythm CNN model via ONNX Runtime Web, and resolves octave ambiguity to minimize errors. This approach achieves 99.5% accuracy without requiring account creation or file uploads to external servers. The interface provides confidence scores alongside BPM readings and allows for easy export of results.

This tool benefits DJs preparing sets, music producers organizing sample libraries, fitness instructors creating tempo-matched workout playlists, and video editors syncing music to visual content. Its batch processing capability makes it particularly valuable for professionals who need to analyze entire music collections quickly. The privacy-focused design ensures that sensitive or copyrighted audio material remains secure on the user's device throughout the analysis process.