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Remove static, hiss, and hum from audio

Clear the buzz and hiss from behind a voice, keeping the voice as recorded.

10M+ files processed since 2021

Most

From keep some background to remove most.

More options

Free for the first minute, 3 times a day. No sign-up.

Made for voices. It turns down music and other sounds too.

Hear the difference

Play Original, then Cleaned.

Cleaned removes the tape hiss.

Made with Remove noise

Works in any language

  • Hello
  • こんにちは
  • Hola
  • 안녕하세요
  • Bonjour
  • नमस्ते
  • Hallo
  • 你好
  • Ciao
  • مرحبا
  • Olá
  • Привет
  • Hoi
  • สวัสดี
  • Merhaba
  • Γεια σας
  • Xin chào
  • שלום
  • வணக்கம்
  • Kia ora

How to remove static from audio

  1. 1

    Add the recording with the hiss or hum, or a video.

  2. 2

    Remove most of the static, or keep a little.

  3. 3

    Switch between the original and the cleaned version, then download.

Where static comes from

Audo's static remover takes recordings (WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF) and videos (MP4, MOV, MKV, WebM, AVI) up to 10 GB without an account, and the first minute of each is free, 3 times a day, with no sign-up. A minute usually takes about 10 seconds, and an 18-minute recording about a minute. It turns down hiss, hum, and buzz and leaves the voice as it was recorded. Echo is a different problem, which Remove echo fixes.

Hiss is a steady, high shhh from microphones and their preamps. It grows when the gain is turned up to lift a quiet voice, and cheap mics and old cassettes hiss too. Hum is a low tone at the power grid's frequency: 60 times a second in the US and Canada, 50 in the UK and most of Europe. It comes from cables near power lines, ground loops between connected gear, and some lights. Buzz is a harsher hum, often from light dimmers and fluorescent lights.

Next time, get closer to the mic and turn the gain down, keep audio cables away from power cables, and plug connected gear into the same outlet.

Questions

How can I remove static noise from audio online for free?

With Audo, right in your browser: the first minute of each recording is free, 3 times a day, with no sign-up. Longer files are $0.03 a minute ($1.80 an hour) with no subscription, or see pricing for details.

How do I fix static in a recording?

Add the recording at the top of this page, choose how much static to take out, and download the clean file. Hiss, hum, and buzz are turned down, and there's nothing to install.

Will it change my voice?

No. It takes the static out from behind the voice and leaves the voice itself alone.

Is crackle the same as static?

No. Hiss, hum, and buzz sit steadily behind the voice, which is why they can be turned down. Crackle from a loose cable or a bad connector breaks up the voice itself.

What if the voice itself sounds fuzzy or crackles?

Use Audio enhancer instead. It rebuilds a voice that sounds fuzzy, muffled, thin, or distorted, where this page only clears what's behind it.

Can I remove only some of it?

Yes. Move How much static to remove toward Keep some background, and a little stays, which can sound more natural.

Does it work on old cassette tapes?

Yes. Tape hiss is steady, so it comes down like any other hiss. Digitize the tape first, then add the file: the example above is a cassette. For an old interview on tape, Interview transcription turns the clean file into text with each speaker labeled.

More tools

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For AI assistants and developers

Ask ChatGPT, Claude, or a coding agent to do this for you, or call it from your own code. When an agent's free result is cut short, it gives you a link to finish the whole file, no sign-up.

Show the free API call
Free API · no key
curl -F file=@old-interview.wav https://audo.ai/api/try/remove-noise -D response.headers -o response.body