The One-Click Podcast Cleaner: Denoise, Normalize, Trim

The Zro7 Podcast Cleaner runs a full denoise → silence-trim → normalize chain in a single pass, entirely in your browser. Drop a raw recording, click Clean, get back a broadcast-ready file. No account, no upload, no Auphonic-style waiting queue — the whole thing is ffmpeg.wasm plus a filter graph that mirrors what pro audio suites do server-side.

What the cleaner does, in order

1. High-pass filter at 80 Hz — kills HVAC rumble, mic-stand thumps, room hum.
2. Spectral denoise (afftdn) — attenuates steady noise floors like fan hiss without hollowing out the voice.
3. Silence removal (silenceremove) — collapses gaps longer than 0.7 s down to 0.3 s. Reclaims dead air without sounding chopped.
4. Dynamic-range compression (acompressor) — evens out loud/soft phrases so the show sits steady.
5. Loudness normalization (loudnorm) to -16 LUFS integrated / -1 dBTP — the podcast industry target (Apple Podcasts, Spotify).

Steps

1. Open Podcast Cleaner.
2. Drop your raw MP3, WAV, or M4A.
3. Click Clean. Watch progress — a 60-minute file typically takes 1–3 minutes.
4. Preview A/B against the original, then export.

Why this beats sending it to a SaaS

• Privacy — an unedited recording often contains guest asides, false starts, or private banter. Zro7 never sees any of it.
• No queue — free tiers of hosted cleaners often wait 15–30 min. Local FFmpeg starts immediately.
• Reproducible — the filter chain is deterministic; same input → same output every time.
• No account, no watermark, no monthly cap.

When to reach for a full DAW instead

The one-click cleaner is perfect for solo shows and remote interviews with reasonable mic hygiene. For multi-track edits, ducking a music bed under speech, or fixing plosives on a per-word basis, you still want Audition or Reaper. But 80% of episodes never need that.