Remove hiss, hum, and background noise from recordings with profile-based reduction. Rescue fan-noisy interviews in one pass — local FFmpeg work, unlimited saves.
Runs on FFmpeg
Content reviewed October 2026 · About Toolzum
Convert M4A audio to uncompressed WAV for DAWs and archival — bit-perfect from ALAC sources. Prep Apple recordings for Pro Tools — local FFmpeg work, unlimited saves.
Compress WAV masters to FLAC at ~60% size with zero loss — the archival standard. Archive studio recordings properly — local FFmpeg work, unlimited saves.
Convert legacy WMA to efficient AAC for modern players and phones. Rescue Windows Media libraries for today — local FFmpeg work, unlimited saves.
Remove blank pages, embedded junk, and bloat from PDFs in one pass — compress, clean, and standardize. Shrink a bloated 80 MB archive for sharing — local work, unlimited saves.
Burn text watermarks into a video with 5 position presets (bottom-right default, fixed 24px white on semi-transparent black box). Brand one clip at a time — local FFmpeg work, unlimited saves.
Constant hiss, fan hum, and room tone — the four levels (Mild, Moderate, Strong, Extreme) drive spectral afftdn (nf -25/-35/-50/-70) or, with the noise-profile box checked, non-local-means anlmdn (s 3/7/12/18). Sudden sounds (doors, coughs) need manual editing instead.
Start at Moderate: over-reduction warbles voices underwater. If Strong or Extreme sounds metallic, step back down — intelligibility beats silence.
Only if pushed too far — conservative settings preserve natural timbre while dropping background. Compare the Original and Processed players after each run and keep the gentlest level that works.
No — reduction runs locally in your browser with FFmpeg. Only saves touch the network — downloads are unlimited.