Analyze audio silence duration online without uploading your file for free
Use this free 100% local tool to analyze audio silence duration online without uploading your file: inspect MP3, WAV, M4A, MP4 or MOV recordings right in your browser with no signup, count every silent pause, and estimate how much manual editing time you can save.
Drop your audio or video file here
Supports .mp3, .wav, .m4a, .mp4, .mov, .flac, .ogg. Decoded locally in your browser memory — nothing is uploaded.
Frequently Asked Questions — Offline Audio Silence Analyzer
Is my audio or video file uploaded to a server?
No, never. This analyzer uses your browser's native Web Audio API (AudioContext.decodeAudioData) to inspect the waveform directly in your computer's RAM. Your recording never leaves your device.
How is manual editing time saved calculated?
In traditional editors like Premiere Pro, DaVinci Resolve or Audacity, finding a silent gap, placing two razor cuts and ripple-deleting the pause takes roughly 8 seconds per cut. Multiplying the detected cut count by 8 seconds gives a realistic estimate of manual scrubbing time saved.
What if my recording is several hours long (e.g. a 3-hour podcast or 72-hour stream)?
Browser tabs have memory limits when decoding giant uncompressed buffers. For multi-hour recordings, download the VoxCut desktop app: it reads files as a continuous FFmpeg stream without filling your RAM.
How do I actually export the trimmed audio, MP4 video or XML/EDL timeline?
Download VoxCut for Windows, Linux or Android. Drop your file in, apply the exact same threshold (-40 dB) and minimum pause duration (0.5 s), and export the cleaned MP3/WAV/MP4 or a non-destructive XML/EDL timeline for Premiere Pro and DaVinci Resolve.