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About BPM Counter
What this tool does
Audio tools let you convert between MP3, WAV, OGG, AAC, and FLAC, trim audio to a specific time range, adjust volume or sample rate, and visualize waveforms. All processing happens client-side using the Web Audio API and FFmpeg.wasm.
Why use this tool
Musicians, podcasters, and content creators frequently need to change audio formats or cut silence from recordings. This tool handles those tasks instantly without uploading sensitive recordings to third-party servers.
How it works
Your audio file is decoded into raw PCM samples using the browser's built-in audio decoder. The tool then applies any requested transformation (trimming, resampling, gain) and re-encodes to the target format. The result is a clean downloadable file.
Pro tip
For podcasts, 128 kbps MP3 mono is the sweet spot: small file size, broadly compatible, and perfectly clear for speech. For music, AAC at 256 kbps or FLAC for lossless archival.
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