Audio Enhancer — Improve Audio Quality Free, In Your Browser
One tool to clean, shape and boost any audio — voice, vocals, music, instruments or podcasts — into something that sounds clearer, fuller and more present. Free, and your file never leaves your device.
Replaces tools like
Works well with
Sound Enhancer is a free, in-browser audio enhancer that makes any recording sound better, not just quieter. It does three things in one pass: removes background noise, shapes the result with a content preset (Vocal, Podcast, Voiceover, Instrument or Music), and boosts quiet audio to a usable level. Two engines pick automatically by preset — a voice-tuned one for speech and vocals, a spectral one for music and instruments — so a guitar or piano gets improved instead of gutted. Everything runs on your own device through WebAssembly: nothing is uploaded, there's no watermark, no sign-up, and you download a lossless WAV.
Enhancing audio is more than removing noise
Pulling the hiss out of a recording is only the first move. A file with the noise stripped can still sound thin, dull, lopsided or too quiet to use — clean isn't the same as good. A real audio enhancer has to do three things: take down the background, shape what's left so it sounds present and full, and lift the level so the result is actually usable. Sound Enhancer does all three in one pass, which is why it improves audio quality rather than just subtracting from it.
So when you drop a file in, you're not just running a noise gate. The cleanup clears the room and the steady background; a content preset then shapes the tone for what you're working with; and a boost brings up anything recorded too soft. You hear the difference as more clarity and body, not just less hiss — a voice that cuts through, a track that opens up, a take that sounds like it was recorded better than it was. That whole-recording lift is the point of the tool.
One enhancer for any audio — voice, vocals, music, instruments
Most browser audio cleaners are voice-only. Feed them a guitar take or a music bed and they wreck it, because they're trained to keep speech and discard everything else. Sound Enhancer is built the other way round — it's universal. Drop in a podcast, a voice memo, a sung vocal, a piano recording, an acoustic guitar or a full music mix, and it improves the right thing instead of flattening it.
It manages that by running two engines under one tool and choosing between them for you. A speech-tuned engine handles anything with a voice; a separate spectral engine handles instruments and music, lowering a noise floor without chewing into the harmonics of a guitar, piano or mix. You never configure that split — you pick the preset that matches your file and the tool routes to the engine that won't gut it. Whether you're rescuing a noisy interview or opening up a hissy demo, the flow is identical: drop, enhance, compare, download.
Presets shape the sound; Boost and Maximum fine-tune it
The five presets do two jobs at once: they pick the engine, and they shape the tone for the content. Vocal, Podcast and Voiceover run the voice-tuned engine, each with its own EQ so a sung line, a spoken episode and a narration track each come out sounding like themselves — present and full, not processed. Instrument and Music switch to the spectral engine that keeps timbre intact. This shaping is what turns a denoised file into an enhanced one.
Two controls sit on top. 'Boost quiet audio' raises a recording that came in too soft — a phone memo, a far-from-the-mic capture, a quiet guest — so you're enhancing a real signal instead of a whisper, and it's peak-limited so a loud moment won't clip. 'Maximum' is a voice-isolation mode that clamps down hard between words, taking a noisy speech recording's in-between hiss to near silence. Maximum is built for voice; on music it over-gates, which is exactly why it's a toggle and not the default.
Hear the improvement before you commit
Enhancing audio is a judgement call — push too hard and a recording can start to sound processed instead of better. So every result lands in an Original ⇄ Enhanced A/B player. You flip between the source and the result and hear exactly what changed: more presence, less hiss, a fuller body, a louder level. No exporting just to check whether it actually sounds better.
Your source stays loaded the entire time, so the comparison is honest and you can't lose the original by experimenting. If a pass takes too much — a vocal that's gone thin, a track that's lost its air — switch the preset, dial the boost back, and re-enhance. The original is never written over. That trust is what lets you push the enhancement as far as it should go and no further, because you can always hear and reach the take you started with.
Nothing uploaded, lossless out, free for good
Sound Enhancer runs on your own device. The file is decoded and processed in your browser through WebAssembly — there's no upload, no server touching your audio, nothing for anyone to keep. That's not a privacy line on a page; it's how the tool is built. You can enhance a confidential client interview, an unreleased track or a private voice note without it leaving your machine, and it keeps working offline once the page has loaded.
When the Enhanced preview sounds right, you download a lossless WAV — what you hear is exactly what you get, with no re-compression and no quality penalty. It's tuned for short-form work, so clips up to about two minutes are the sweet spot. And it's free the whole way through: no watermark on the file, no account to create, no paywall at the download. The engines download to your browser once, then everything runs locally — funded by optional support, never by holding your result hostage.
How to enhance audio in your browser
- 1
Drop your audio or video file
MP3, M4A, WAV or a video — Sound Enhancer pulls the audio. It stays in your browser; nothing is uploaded. Clips up to about two minutes work best.
- 2
Pick a preset, then shape it
Choose Vocal, Podcast or Voiceover for speech, or Instrument or Music for everything else — the tool auto-routes to the right engine and shapes the tone. Turn on 'Boost quiet audio' if it came in soft, or 'Maximum' to fully isolate a voice.
- 3
A/B, then download lossless
Flip the Original ⇄ Enhanced toggle to hear exactly what improved. When it sounds right, download a lossless WAV — free, no watermark, no sign-up. Re-enhance at a different preset any time; your original is untouched.
Questions
It makes a recording sound better, not just quieter. Sound Enhancer does three things in one pass: removes background noise, shapes the result with a content preset so it sounds present and full, and boosts quiet audio to a usable level. The combination is what improves audio quality — a denoised file alone can still sound thin or too soft.
Any audio. Pick Vocal, Podcast or Voiceover for speech and it runs a voice-tuned engine; pick Instrument or Music and it switches to a spectral engine that lowers the noise floor without chewing into the harmonics of a guitar, piano or full mix. Voice-only tools gut music because they're trained to keep only speech — this one routes music to an engine built for it.
You tell it, by preset. The preset is the routing decision — Vocal, Podcast and Voiceover use the speech-tuned engine; Instrument and Music use the spectral engine — so you never configure engines by hand. If a result sounds wrong, switch the preset and re-enhance; your original is always kept.
No. Everything runs on your own device in the browser via WebAssembly — there's no upload and no server processing your file. You can enhance confidential interviews, client calls or unreleased tracks without them touching anyone's cloud, and it works offline once the page has loaded.
Yes. Sound Enhancer is free for everyone — no account, no watermark on the file, and no paywall at the download. You download a lossless WAV with no re-compression. It's funded by optional support, never by holding your result hostage.