Audio Volume Booster Online
Increase the volume of any audio file in your browser. Pick from +3 to +12 dB boost, instantly get a louder MP3 — no sign-up, no upload.
Boost Audio Volume in 3 Steps
No account. No upload. Just drop your file and pick a preset.
Upload Your Audio
Drag and drop an MP3, WAV, or other audio file onto the tool. Files up to 200 MB.
Pick a Boost Preset
Tap +3, +6, +9, or +12 dB. Start low for mastered music, higher for quiet voice memos.
Boost & Download
Hit Boost & Download. The louder file is encoded as a 192 kbps MP3 and saved to your device.
Why Notevibes Volume Booster
Simple, honest, and built to respect your files.
4 Boost Presets
Pick +3, +6, +9, or +12 dB with one click. No sliders, no numeric input — just tap the boost amount you need and download.
Instant Result
Gain is applied sample-by-sample in a fraction of a second. Drop a file, pick a preset, and the louder MP3 lands in your downloads folder immediately.
Privacy First
Your audio is processed locally in your browser using the Web Audio API. Nothing is uploaded, stored, or tracked — your file never leaves your device.
Any Audio Format
Drop an MP3, WAV, M4A, FLAC, OGG, or AAC file up to 200 MB. Anything your browser can decode via the Web Audio API will load and boost.
MP3 Output
The boosted file is encoded as a clean 192 kbps MP3 and saved straight to your device — no watermark, no ads, no attribution.
Works on Mobile
Boost audio volume on your phone or tablet. Runs on iOS, Android, Chrome, Firefox, Safari, and Edge — upload, pick a preset, download.
Your Audio Stays on Your Device
Every file is processed locally in your browser using the Web Audio API. Nothing is uploaded, stored, or analyzed.
No Upload
File never leaves your device
No Account
Start boosting immediately
No Tracking
We never see your audio
When to Use a Volume Booster
Most files process in under a second.
Louden quiet voice memos
Make whispered voice memos audible on laptop speakers without headphones
Boost podcast recordings
Lift quiet interview audio before editing so guests match the host level
Fix quiet phone recordings
Amplify muffled phone-call recordings so every word comes through clearly
Quieter speakers compensation
Bump audio louder for laptops, car stereos, or small Bluetooth speakers
Hearing-impaired listening
Raise dialog levels in lectures, audiobooks, and calls for easier listening
Whispered recordings
Rescue whispered interviews or ASMR takes where the mic was too far away
Need More Than a Volume Booster?
The full Notevibes Online Audio Editor lets you trim clips, mix multiple tracks, normalize loudness, add fades, clean up podcasts, and export to MP3 or WAV — all in your browser.
Open Full Audio EditorRelated Audio Tools
More free browser audio tools from Notevibes — no sign-up, no upload.
Frequently Asked Questions
How do I boost audio volume online?
Drop your audio file onto the Notevibes Audio Volume Booster, pick a boost preset (+3, +6, +9, or +12 dB), and click Boost & Download. A louder MP3 is saved to your device in seconds. The whole process runs in your browser — no upload, no sign-up, no watermark.
What is dB?
dB (decibel) is a logarithmic unit for sound intensity. On this tool, +6 dB roughly doubles the perceived loudness and +12 dB roughly quadruples it. Because dB is logarithmic, small numbers represent large differences — a +3 dB boost is a noticeable lift without heavy distortion risk.
Will boosting cause distortion?
Yes, it can — and we want to be honest about it. If the original audio is already near peak level, boosting it will push samples past the digital ceiling. We clamp each sample to prevent hard clipping, but audio may still sound distorted if pushed too high. For professionally mastered music, start with +3 dB. For quiet voice memos or phone recordings, +6 to +12 dB is usually safe.
What is the difference between boosting and normalizing?
Normalizing scales your audio so the loudest peak sits at 0 dB (or a chosen target) — it never exceeds the ceiling, so it never distorts. Boosting adds a fixed amount of gain regardless of the current level, which is faster but can clip loud audio. If your file is already loud, use the Notevibes Audio Normalizer instead for a cleaner result.
Is the audio volume booster free?
Yes. Completely free with no sign-up, no watermark, no ads, and no limits on how many files you can process. Max file size is 200 MB.
Is my audio file uploaded to a server?
No. The booster runs entirely in your browser using the Web Audio API. Your file never leaves your device — nothing is uploaded, stored, or analyzed.
What audio formats are supported?
MP3, WAV, M4A, FLAC, OGG, and AAC. Anything your browser can decode via the Web Audio API will load. The boosted output is exported as a 192 kbps MP3.
Does it work on mobile?
Yes. It runs on Chrome, Firefox, Safari, and Edge on both desktop and mobile. Tap to upload, pick a dB preset, tap Boost & Download — the louder file is saved straight to your phone.