Remove Silence: cut quiet gaps from any recording in your browser

Upload an audio file and BlowFix scans it for quiet gaps. Every silence it plans to cut is shown as a red band on the waveform, so you see exactly what will be removed before you export. Pick a preset or dial in your own threshold, set a minimum length, add guard padding so speech never gets clipped, and apply a short fade at every join so there are no clicks. Download as MP3 at the quality you need or as lossless WAV. Every output is stamped with blowfix.com metadata. Everything runs in your browser: your audio never leaves your device.

Drop your audio file here or click to browse

Supports MP3, WAV, OGG, FLAC, AAC, M4A, OPUS - Max 50 MB

File

Sensitivity Preset

Balanced: cuts at -40 dB and removes gaps longer than 1.0 second. Works well for most podcasts and voiceovers.

Detection

Silence threshold

-40 dB

Lower catches quieter sounds as silence. Higher only catches very quiet passages.

Minimum silence length

1.0 s

Gaps shorter than this are left alone, so natural pauses are preserved.

Guard padding

50 ms

Keeps a small buffer on each side of speech so word onsets are never clipped.

Cut Behaviour

Fade at each join

10 ms

Short crossfade so the joins never click. 10 ms is a safe default.

Keep a brief pause at each cut

Pause length

0.25 s

A small gap preserves natural rhythm between sentences.

Result Preview

Silences

Cut

0:00.000

Output

0:00.000

Waveform - red bands will be cut -

0:00 / 0:00

- Preview from 0:00.0

Click a red band to keep that silence. Click elsewhere to set the preview start. Drag the sliders to fine-tune.

Silence removed -

MP3 Quality