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Boost Audio

Upload audio or video — boost volume for free

Boost Audio

Boost volume in seconds — without distortion

Fine-tune audio online with a free sound booster

Amplify audio, no experience needed

Kapwing's free Audio Booster increases volume, improves clarity, and balances sound, no technical skills required. Use a slider to boost audio in MP3 and MP4 files for clean, powerful sound with no distortion or clipping.

Boost volume on your entire file to fix quiet mics and recording errors, or separate vocals from background sound to adjust the balance of voice to music. Built for content creators and video professionals, the sound booster lets you raise the decibels and increase gain while preserving sound quality.

Boost Audio

Increase volume, then keep editing in a powerful studio

Go beyond increasing the volume in your audio and video: edit every aspect of your project without leaving your browser.

Enhance your audio with one-click AI tools that improve vocal quality, normalize volume, clear background noise, and remove unwanted silences. Add sound effects or royalty-free music from an extensive stock library. Add automatically synced subtitles and waveforms. Then download and share your polished content.

Boost Audio

Real teams creating on Kapwing

Already transforming video creation across industries

Hear directly from the teams who publish faster, collaborate better, and stay ahead.

View all reviews

It just works!

Kapwing is incredibly intuitive. Many of our marketers were able to get on the platform and use it right away with little to no instruction. No need for downloads or installations - it just works.

Eunice Park

Studio Production Manager at Formlabs

With Kapwing, we're always ready to create.

Kapwing is an essential tool that we use in MOXIE Nashville every day. As a social media agency owner, there's a variety of video needs that my clients have. From adding subtitles to resizing videos for various platforms, Kapwing makes it possible for us to create incredible content that consistently exceeds client expectations. With Kapwing, we're always ready to create - from anywhere!

Vannesia Darby

CEO at MOXIE Nashville

Spend less time learning... and more time crafting stories.

Kapwing helps you spend less time learning complex video editing platforms and more time crafting stories that will connect with your audience and customers. We've used the platform to help create engaging social media clips from our clients' podcasts and we can't wait to see how the platform simplifies this process going forward. If you've learned graphic design with Canva, you can learn video editing with Kapwing.

Grant Taleck

Co-Founder at AuthentIQMarketing.com

It keeps getting better!

Kapwing is probably the most important tool for me and my team. It’s always there to meet our everyday needs in creating scroll-stopping and engaging videos for us and our clients. Kapwing is smart, fast, easy to use and full of features that are exactly what we need to make our workflow faster and more effective. We love it more each day and it keeps getting better.

Panos Papagapiou

Managing Partner at EPATHLON

By the far the most user friendly software to use.

As a housewife at home looking to start a YouTube channel for fun with absolutely zero editing experience, it was so easy for me to teach myself via their YouTube channel. It takes the tediousness out of editing and encourages creativity. As long as Kapwing is around, I will be using their software.

Kerry-lee Farla

Youtuber

Kapwing is my secret weapon!

This is one of the most powerful, yet inexpensive and easy-to-use video editing software I've found. I blow my team away with how fast and efficiently I can edit and turnaround video projects.

Gracie Peng

Director of Content

Kapwing is king.

When I use this software, I feel all sorts of creative juices flowing because of how jam-packed with features the software really is. A very well-made product that will keep you enticed for hours.

Martin James

Video Editor

Love this site.

As an English Foreign Language Teacher, this site helps me to quickly subtitle interesting videos that I can use in class. The students love the videos, and the subtitles really help them to learn new vocabulary as well as better understand and follow the video.

Heidi Rae

Education

Excellent subtitling features

[It] works perfectly for me. Have been using Kapwing for a year or so, and their automatic subtitle tool gets better and better every week, it's rare that I have to correct a word. Keep up the good work!

Natasha Ball

Consultant

Best online video service ever. And a miracle for deaf people.

[Subtitler] is able to autogenerate subtitles for video in almost any language. I'm deaf (or almost deaf, to be correct) and thanks to Kapwing I'm now able understand and react on videos from my friends :)

Mitch Rawlings

Information Services Freelancer

This tool should be in every social media account managers' bookmark list.

I use this daily to help with video editing. Even if you're a pro video editor, there is no need to be spending hours trying to get the format correct. Kapwing does the hard work for you.

Dina Segovia

Virtual Freelance Worker

●Step by Step

How to Boost Audio Online

Step 1
Upload
Create a new project in the studio, then click to upload your audio or video file.
Step 2
Boost audio
Select the file in your timeline, then either drag the pink line up or scroll to "Audio" in the right sidebar and drag the slider to boost volume.
Step 3
Export
Apply any of Kapwing's other audio editing tools. Then click "Export Project" to save and share your boosted file.

●Thoughtfully Unique

What's different about Kapwing?

Six reasons creators stay in flow: faster edits, smarter tools, and collaboration that actually keeps projects moving.

Easy

Start creating immediately with thousands of templates and copyright free videos, images, music, and GIFs. Repurpose content from the internet by pasting a link.

Free

Kapwing is completely free to start. Just upload a video and start editing. Supercharge your editing workflow with our powerful online tools.

Collaborative

Quickly review and share feedback with your team using real-time comments in shared workspaces. Save assets to your Brand Kit for easy access.

Online

Kapwing is cloud based, which means your videos are wherever you are. Use it on any device and access your content anywhere in the world.

No spam or ads

We don't serve ads: we're committed to building a quality, trustworthy website. And we will never spam you nor sell your information to anyone.

AI-Powered

Kapwing uses the latest advanced AI models to power generative AI and one-click editing tools.

●Just the FAQs

Frequently Asked Questions

We have answers to the most common questions that our users ask.

Is the Boost Audio tool free?

Yes, Kapwing's Boost Audio is free for all users.

Is there a watermark on exports?

If you use Kapwing on a Free account, then all video exports — including Boost Audio — contain a watermark. Once you upgrade to a Pro account, the watermark is completely removed from your creations.

How to boost audio with Kapwing

Audio volume boosting with Kapwing is a straightforward process. Create a project in the studio, then upload your MP3 or MP4 file. Select it in the timeline, then find the "Audio" section of the righthand toolbar. Use the slider to boost audio on video, podcast, or music files, then click "Export Project" when you're ready to download and share..

This video audio booster increases gain and helps balance sound levels without reducing quality. The MP4 audio booster lets you boost volume of video content for YouTube, social media, or presentations.

Can I boost audio on my phone?

Yes, you can easily use the audio volume booster on your phone, including iPhone and Android devices, by opening the Kapwing studio in your mobile browser. Click to upload your audio or video file, then select it in the timeline. Click "Audio" in the bottom toolbar, then drag the slider to boost the volume. When you're ready, you can save your boosted audio to your phone by clicking "Export Project."

Does boosting audio affect sound quality?

No, Kapwing's audio sound booster is designed to increase volume while preserving clarity. It raises gain carefully to prevent clipping and distortion, making it a reliable increase volume booster for both voice and background audio tracks.

What is an audio booster?

Kapwing’s Audio Booster is an online audio booster that lets you boost audio using a simple slider. It works as an intelligent audio volume booster, increasing loudness while preventing distortion and clipping. You can use it as an MP3 audio booster, or video audio booster to quickly fix quiet recordings.