By ShinobiTools Team · Last updated: 28 September 2026
Enhance audio quality free: drop in a noisy recording and get the same voice back without the room behind it. Fans, traffic, hum, hiss and light echo are pulled down; the voice stays as it was recorded. No sign-up, no watermark.
MP3, WAV, M4A, FLAC, OGG or a video file, up to 45 minutes and 1 GB. You get a cleaned MP3 and a lossless WAV back; for a video, the same video with clean sound.
No watermark, no sign-up, 10 recordings a day. Files up to 45 minutes free. A pass allows longer files and adds loudness levelling and a heavier repair pass for rough recordings.
Most recordings that "sound bad" are a perfectly good voice with something behind it. This AI audio enhancer separates the speech from the steady sound around it and pulls that layer down:
On the free tier the voice itself is not replaced or re-generated: what you hear afterwards is your own recording, with the room turned down. The deeper cleanup that comes with a pass does rebuild the voice, for recordings with echo or heavy noise.
| Length per file | Recordings a day | Loudness levelling + repair pass | |
|---|---|---|---|
| Free, no sign-up | 45 minutes | 10 | no |
| Free monthly pass (email) | 2 hours | 25 | yes |
| ShinobiTools pass | 3 hours | 50 | yes |
No watermark on any tier. Your upload is deleted right after processing and the result is wiped within 45 minutes.
Drop an MP4 or MOV in the same box and you get the same video back with the cleaned sound track. Is the picture the problem rather than the sound? The video quality enhancer on VideoBGNinja sharpens and enlarges small or soft clips. Need the words as text afterwards? Video to text on ScribeGrab transcribes it.
The same tool. If your recording is one or two people talking, the voice enhancer page walks through that case: phone memos, calls and interviews. For a specific noise there are pages on hum and hiss, wind and room echo.
Yes: 10 recordings a day, up to 45 minutes each, with no sign-up and no watermark. A free monthly pass (email) raises that to 2 hours and 25 a day, a ShinobiTools pass to 3 hours and 50 a day.
No. It is tuned for speech. It does not master songs, add bass or make music louder, and on music the result can be poor. To take the vocals out of a song, use StemGrab.
Yes. Upload an MP4, MOV, MKV or WEBM and you get the same video back with the cleaned sound. The picture is not touched.
Not on the free tier: it removes what is behind the voice, it does not raise the volume. Loudness levelling to podcast level comes with a pass.
MP3, WAV, M4A, FLAC, OGG, AAC, OPUS and common video files, up to 1 GB and 45 minutes. You get a cleaned MP3 and a lossless WAV back.
The upload is deleted right after processing and the cleaned file is wiped within 45 minutes. See privacy.