What is the soft limiter and why is it useful?

The limiter gently reduces peaks above −6 dBFS. Without it, boosting a track by +12 dB will almost always clip — the waveform gets chopped flat at the max, producing crackly distortion. The limiter tames peaks so the overall loudness goes up without the harshness. Keep it on unless you're working with already-loud source material.

Will boosting add noise or distortion?

Boosting alone amplifies everything — the signal and the noise floor. On quiet, clean recordings the noise floor is usually low enough to stay inaudible. On noisy sources (old recordings, phone voice memos), the limiter keeps peaks from clipping, but background hiss may become more noticeable. The trade-off is inherent to any volume boost.

Are my audio files uploaded to a server?

No. Everything runs instantly. Your file is decoded, amplified, and re-encoded entirely on your device — nothing leaves your browser.

Which formats can I upload?

MP3, WAV, M4A, AAC, OGG, WebM audio, and FLAC. Support depends on your browser's native decoder — modern Chrome, Firefox, Edge, and Safari all handle these.

Should I use MP3 or WAV for export?

MP3 (192 kbps) is fine for sharing, podcasts, ringtones, and everyday use. WAV is lossless — larger files (roughly 10MB per minute) but perfect for archiving or further editing.

What if I boost too much and it sounds bad?

Just lower the slider and click Apply Boost again — no need to re-upload. The original decoded audio stays in memory, so you can iterate freely. Each Apply Boost produces a fresh processed buffer; exporting overwrites the previous output.

Why does the level meter show the same value after boosting?

Because the limiter is doing its job. If your original peak was at −6 dBFS and you boost by +12 dB, the peak would naturally hit +6 dBFS (clipping). The limiter reduces it back to around −6 dBFS — so the peak looks the same but the perceived loudness is much higher. Toggle the limiter off to see the raw boost.

Can I boost specific parts of the file?

Not in this tool — it applies uniform gain to the entire file. For section-specific volume changes, use the Audio Cutter to extract the region, boost it here, then merge with the rest using a future concatenation tool.

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Up to +18 dB Gain · 100% Private

Audio Volume Booster

Amplify quiet MP3s, WAVs, podcasts, and voice recordings up to 300% louder — instantly. A built-in soft limiter prevents clipping and distortion. Preview the result instantly, then export as MP3 or WAV. Nothing is uploaded.

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MP3, WAV, M4A, AAC, OGG, FLAC · Single file · Processed instantly

Drop an audio file to get started

Supported: MP3, WAV, M4A, AAC, OGG, FLAC. Boost quiet tracks, voice memos, and podcasts — with a limiter that keeps things clean.

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How to boost audio volume in 3 steps

Louder audio in seconds — no downloads, no uploads.

Upload your audio

Drop any MP3, WAV, M4A, AAC, OGG, or FLAC file. We decode it instantly and analyze the peak and RMS levels so you can see how loud it currently is.

Set the boost amount

Drag the slider between 0 dB (original) and +18 dB. The soft limiter is on by default and prevents clipping — perfect for podcasts, voice memos, and quiet music.

Preview and download

Click Apply Boost. Compare original vs. boosted with the A/B preview buttons. Then export as MP3 for sharing or WAV for lossless output.

Frequently Asked Questions

Up to +18 dB, which is roughly an 8× linear gain — about 300% louder in perceived terms. Most quiet audio only needs +6 to +12 dB before it reaches a comfortable listening level.

About the Audio Volume Booster

Everything you need to know

Why boost audio?

Traditional audio editors require downloads or uploads. Server-based boosters expose your files to third-party infrastructure and often re-encode with losses you can't control. This tool decodes, amplifies, limits, and re-encodes audio instantly on your device. Zero uploads, zero installs, works offline after first visit.

When to use a volume booster

Old concert recordings, phone voice memos, and legacy MP3s often sit 10–15 dB quieter than modern masters. Podcast episodes recorded with a low-gain mic benefit from +6 to +10 dB of boost plus the limiter. Educational videos, audiobooks, and downloaded interviews frequently need a lift before they're comfortable on headphones. If you find yourself turning your device volume up to 100% and still straining, the source needs a boost.

Understanding dB, gain, and perceived loudness

Decibels are logarithmic — every +10 dB roughly doubles perceived loudness, and +20 dB makes a track feel four times louder. A +6 dB boost is a 2× linear gain, which is a noticeable but gentle lift. A +12 dB boost is roughly 4× linear gain and will make most quiet tracks sound loud. The limiter matters because digital audio has a hard ceiling at 0 dBFS — anything above that is clipped, producing distortion. By compressing peaks, the limiter lets you raise the overall loudness without crossing that ceiling.

Performance, quality, and privacy

Because processing runs on your device, it happens faster than realtime — typically 10–20× faster than playback. A 5-minute MP3 is boosted in 15–30 seconds on a laptop. Quality is preserved at every step: decoding produces 32-bit float samples, gain is applied as a float multiply, and the limiter operates on float data. Only the final MP3 encode introduces lossy compression. WAV export is lossless. Nothing leaves your device, and the tool works fully offline after the first page load.