Drag & drop an audio file, or click to select
MP3 / WAV / OGG / M4A / FLAC / WebM supported
Drag & drop or click to select the audio file you want to denoise. Supports MP3, WAV, OGG, and other major formats.
The AI (RNNoise) analyzes the audio and removes background noise entirely in your browser.
Switch between the original and processed audio tabs to compare.
Download the denoised audio as MP3 (192 kbps).
Fixed a click/pop noise at the very end of the processed audio that occurred only when using the DPDFNet model.
No sign-up required. No usage limits. All features are free.
Audio is never uploaded to a server. All processing happens in your browser.
Detects and removes background noise in real time using the RNNoise AI model developed by Mozilla / Xiph.org.
Works on iPhone and Android browsers. No app installation needed.
Shizuka offers three AI models. Choose the one that best fits your use case.
A lightweight RNN-based model. Extremely fast, runs smoothly even on smartphones. Best for steady background noise such as air conditioning, fans, and white noise. Try this first if unsure.
A noise suppression model developed by Microsoft. Converts audio to the frequency domain via STFT and processes entire frames, handling complex noise patterns. Try this when RNNoise is not enough. Processing takes a bit longer.
A stateful model that maintains internal state across frames. Considers the context of surrounding audio, making it strong against fluctuating or sudden noise. Ideal for podcasts and narration production.
You can process the same file with multiple models and compare the results.
Remove air conditioner and keyboard noise from recordings of Zoom, Google Meet, or Microsoft Teams calls. Also helps improve transcription accuracy.
Remove background noise from recordings made at home or on the go for near-studio quality.
Remove ambient noise from interviews recorded in cafes or on the street, making the speaker's voice clear.
Remove noise from voice memos recorded on your smartphone, making them easier to listen to.
Extract audio from YouTube, TikTok, or Vlog videos, denoise it, and put it back for clearer content.
Denoise before running AI transcription (e.g., Whisper) to significantly improve recognition accuracy.
Yes, it is completely free. No sign-up or login is required, and there is no usage limit.
No. All processing happens entirely in your browser. Your audio is never sent to a server, so your privacy is protected.
Input supports MP3, WAV, OGG, M4A, FLAC, WebM and any audio format your browser can play. Output is MP3 (192 kbps).
It excels at background noise such as air conditioners, fans, keyboard typing, cafe and office chatter, wind, white noise and hiss. It is not suited for removing background music, reverb or echo.
Shizuka handles audio files only. To improve a video's voice track, extract the audio, denoise it with Shizuka, and merge it back using a video editor.
Shizuka specializes in removing background noise. It does not restore clipping or muffled audio itself, but removing the noise layered over the voice often makes it noticeably clearer.
Noise cancelling on earphones cancels sound you hear in real time. Shizuka removes background noise from already-recorded audio files using AI — ideal for cleaning up meeting recordings or voice memos.
RNNoise is light and fast, great on phones and for steady noise. NSNet2 (by Microsoft) is balanced and handles complex noise. DPDFNet is a high-quality model that considers audio context — best for podcasts and narration.
Yes, it works directly in iPhone and Android browsers with no app to install. For long audio, keep files within about 5 minutes due to memory limits.
Shizuka (1) processes audio entirely in your browser without uploading, (2) needs no sign-up, (3) is completely free with no limits, and (4) lets you compare three AI models.
Shizuka denoises audio files, but it also helps clean up video sound. Extract the audio from your video, remove the hiss and ambient noise with Shizuka, then put it back with your editing software to make the video sound clear. A handy free option if you are looking for a way to remove noise from videos.
Yes. Audio recorded for streams or YouTube/TikTok videos can be denoised with Shizuka before you upload or go live. It removes air-conditioner hum, keyboard clicks and chatter picked up by the mic, leaving clear audio that is easy for viewers to hear.
Audio files are never sent to a server. Processing runs on in-browser AI (WebAssembly), so even confidential recordings such as meetings or interviews can be denoised safely.
Load major audio formats in your browser and export as MP3 (192 kbps). Works for MP3 noise removal, WAV and M4A denoising, and more — regardless of format.
Remove background noise — air conditioners, keyboards, chatter — from Zoom, Teams and Google Meet recordings, phone voice memos, and podcast or stream voice tracks to make them easier to hear.
With Chrome, Edge, Safari or Firefox it runs on Windows, Mac, iPhone and Android with no installation. Long audio is more stable on a PC.
Many noise removal services are upload-based, require accounts, or have paid plans. Shizuka is local-processing, sign-up-free and completely free — better for both privacy and cost.
Even if you want a "free video noise removal site" or to "remove noise from a movie", you can do it through the audio track with Shizuka: (1) export the audio (MP3, WAV, etc.) from your video using an editor or converter, (2) load that audio into Shizuka and remove hiss, ambient noise and typing sounds, (3) swap the cleaned audio back into the video. It runs entirely in the browser, needs no sign-up and is completely free.