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Audio Waveform — Local Decode and Waveform Image

Upload audio to decode locally, draw the waveform, show duration, sample rate, and channels, and export a waveform image. Useful for checking recordings and making thumbnails.

Quick switch→Audio Trimmer
AudioWaveformVisualization
Quick switch:Audio TrimmerMetronomeSpeech Duration Estimator

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Copy this tool URL or open the system share sheet on a supported device.

Use cases

  • Check clipping on recordings
  • Verify sample rate and channels
  • Export a waveform thumbnail

How to use

  1. Upload an audio file
  2. Review waveform and metadata
  3. Export a waveform image if needed

Example input and output

File

sample.wav

Info

Duration / sample rate / waveform

FAQ

Is audio uploaded to a server?

No. Decode and drawing stay in the browser.

Which formats work?

Whatever the browser can decode—often WAV and MP3. Unsupported files show a decode error.

Tools

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Audio Trimmer

Audio Trimmer — Waveform Selection to WAV

Available

Upload audio, select a precise start/end range on the waveform, preview the selection, and export a trimmed WAV. Useful for clips, ringtones, and trimming silence.

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Metronome

Metronome — Adjustable BPM & Meter

Available

Online metronome from ~30–300 BPM with meter and tone options plus visual beat feedback—for practice, singing, and recording tempo checks.

Metronome Music BPM
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Speech Duration Estimator

Estimate Spoken Delivery Time from Text

Available

Estimate how long a script takes to speak aloud using separate Chinese character and English word rates, with adjustable speeds and paragraph stats for talks, podcasts, and timed shares.

Text Speech Duration
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