Change audio volume
Drop a recording and set the gain in decibels or as a percentage, or normalize it so its loudest moment sits just under full scale. The panel shows the file's peak and warns before a boost would distort. Nothing leaves your device.
Updated October 30, 2026
Options
How it works
- Drop an audio file, or a video, anywhere on this page.
- Set the gain with the slider, in dB or in percent, or choose Normalize; the peak line says whether it would clip.
- Files up to two minutes are done at once; for longer ones press Change audio volume. Then download.
The cases this tool is made for
A voice memo recorded too far from the phone. A podcast guest who is much quieter than the host. A song that peaks far below the rest of a playlist. A ringtone that needs to be louder. Drop the file, set a gain from −30 to +30 dB, or choose Normalize to bring the loudest moment to −1 dBFS, and the peak line tells you at once whether the change stays clean.
The default of +6 dB is a clear but safe lift for most files. For a big boost, look at the peak line first: it says how far the file can go before it distorts.
Fades and other finishing touches
Fade in and Fade out, up to 10 seconds each, remove the click at the start of a recording and let a song end gently when it is cut short. They are applied after the gain, so a normalized file still fades cleanly. For a short intro or a ringtone, a fade of one or two seconds is usually enough.
Batches, videos and phones
Up to 20 files can take the same gain in one list. A video dropped here gives back its sound as an audio file; to keep the picture, use Change video volume instead. The decoding and encoding run in your browser, so nothing leaves your device, and files up to two minutes are done as soon as you change a setting. On a phone, a few minutes of audio is the practical limit.
Why people use it
Free, no account
Every tool is free, with no sign-up, no e-mail address and no limit on how often you use it.
Your files stay on your device
The browser opens the file and processes it in memory, on your device. Nothing is uploaded, so nothing can be kept, leaked or looked at.
No watermark
The result is yours as it is: no watermark, no branding, no trial version.
Any device
A phone, a tablet or a computer with a current browser is enough: no app to install, no software to update.
Works offline after the first visit
The browser keeps the pages and their engines, so a tool you have opened once keeps working without a connection.
Open-source engines
The code that does the work is open-source software, named on the Licences page, running as WebAssembly in your browser.
Why it is private
Everything you type or drop here is handled by your browser, on your device. Nothing is uploaded. To verify, open your browser's developer tools, go to the Network tab, and use the tool: you will see no request carrying your data.
While a file is being processed, the counter under the result shows the page's network traffic: 0 requests and 0 B for your data.
How to check it yourself, step by step
What you can check yourself
Open your browser's developer tools on the Network tab before you drop a file: while the tool works you will see no request carrying your data, and the counter under every result shows the page's own measurement.
The site sets no cookies, so there is no cookie banner. Anonymous usage counts and error reports without file names are the only things that leave the page, as the privacy policy describes.
Every change goes through thousands of automated tests in three browser engines, including a guard that fails a test if a single byte of a file leaves the page.
Frequently asked questions
- Decibels or percent?
- Both set the same thing, the level of every sample, and the two fields follow each other. 200 % doubles it, which is +6 dB; 50 % halves it (−6 dB). The ear hears about +10 dB as twice as loud, so +6 dB is clearly louder but not twice as loud.
- Why does it warn about clipping?
- A file cannot go above full scale (0 dBFS). The panel measures the loudest sample of your file and shows where it would land; above 0 dBFS those samples are cut flat, which sounds harsh. Lower the gain to the value it suggests, or use Normalize, which raises the level only as far as it can go.
- What does Normalize do?
- It scales the whole file so its loudest sample sits at the level you choose: −1 dBFS by default, which leaves a little room for MP3 and AAC. It works on the peak, not on perceived loudness (LUFS), so two normalized files can still sound a little different.
- Can I make it quieter, or mute it?
- Quieter, yes: down to −30 dB, about 3 % of the level. Muting is not offered; to silence a part, cut it out with Trim audio.
- Does it lower the quality?
- A new level means decoding and encoding again. With the format on Same as the file, an MP3 or AAC is written again at the source's bitrate, a small loss; WAV and FLAC lose nothing. At 0 dB with no fades the file is copied unchanged.
- Is my file uploaded?
- No. It is decoded, changed and encoded in your browser; the network meter under the result stays at 0 B.
- Can I make several recordings equally loud?
- Choose Normalize and the same peak level for each: every file ends with its loudest sample at that level. It matches peaks rather than perceived loudness, so a file with one loud click may still sound quieter. For files you will join, Join audio has Level each file built in.
- Why is my file still quiet after Normalize?
- Its loudest sample was already near the ceiling, often a single click or pop, so there was no room to raise it. Cut that moment out with Trim audio first, or use Gain and accept the clipping warning on the peaks.
- Can I change the volume of a video here?
- Only its sound: the result is an audio file without the picture. To make a video louder and keep the picture untouched, use Change video volume.
- Does it work on a phone without an app?
- Yes. Open the page in the phone's browser, pick the file, set the gain and download. Nothing is installed and nothing is uploaded.
Install it as an app
Chrome, Edge and Android browsers offer to install this site from the address bar or the menu; on iPhone use Share, then Add to Home Screen. It opens like an app, keeps working offline and still processes everything on your device.