AudioCharger
41+ free audio tools · No sign-up

Every audio tool you need,
supercharged.

Convert, cut, join and remix audio in seconds. Slowed + reverb, 8D, bass boost, BPM, video tools and a full studio. Everything runs in your browser, so your files never leave your device.

or drop audio and video files here

100% free No uploads, fully private Works on any device

Pick a tool, get it done

Popular tools up front, with every other audio job one click away.

Audio Converter

Convert between MP3, WAV, FLAC, M4A, OGG and WebM.

Video to Audio

Pull the soundtrack out of MP4, MOV, MKV or WebM as MP3 or WAV.

Cut Audio

Trim songs and recordings on a waveform, with fades.

Join Audio

Combine songs and clips into one file, with crossfades.

Volume Booster

Make quiet audio louder, or turn it down.

Pitch Shifter

Change the key without changing the speed.

Slowed + Reverb

The dreamy slowed + reverb sound in one click.

Nightcore

Faster, higher, brighter: the nightcore effect.

8D Audio

Make sound circle around your head.

Bass Booster

Add punch and depth to the low end.

BPM Detector

Find the tempo of any song, or tap it in.

Audio Recorder

Record your microphone and save as MP3 or WAV.

Add Music to Video

Put a song behind your video and mix the levels.

Compress Video

Make videos smaller for email and messaging.

View all 41 tools
AudioCharger Studio

A full music studio, in a browser tab.

Multitrack editing, a mixer with EQ, compressors and reverbs, MIDI with built-in synths and drums, automation and bouncing to WAV or FLAC. No install, no account.

  • Multitrack editing & undo
  • Built-in synths, drums & sampler
  • EQ, dynamics, reverb, delay
  • Piano roll & score view
  • Automation & markers
  • Pitch-preserving warping
Open the Studio
AudioCharger Studio's edit window with drum, bass, pad, keys and lead tracks

How AudioCharger works

1

Choose your files

Click “Select files” or drag & drop songs, recordings or videos onto the page.

2

Pick a tool

Convert, trim, add effects or analyze. Tweak the settings and preview before you save.

3

Download the result

Save your finished file straight away. Nothing is stored or uploaded to any server.

Processed on your device

The audio toolkit that never uploads your files

Most online audio sites send your recordings to their servers. AudioCharger does the work inside your browser using WebAssembly and WebCodecs, so voice notes, demos and private recordings stay with you.

100% private

All processing happens in your browser. Your files never leave your device.

Lightning fast

No upload or download queues. Files are processed locally at full speed.

Completely free

No registration, no watermarks, no limits, no hidden costs.

Works anywhere

Windows, Mac, Linux, iPhone or Android. All you need is a modern browser.

41+
Audio & video tools
100%
Free to use
6
Output formats
0
Files uploaded

Frequently asked questions

Is AudioCharger really free?

Yes. Every tool is free with no sign-up, no watermark and no daily limits. The site is supported by unobtrusive ads.

Are my files uploaded anywhere?

No. Your audio and video files are processed inside your browser with WebAssembly and WebCodecs. They never leave your device.

Is there a file size limit?

Only your device's memory. Most phones handle songs and short videos easily; laptops can process files of several hundred megabytes.

Which formats are supported?

AudioCharger opens MP3, WAV, FLAC, M4A/AAC, OGG, Opus, WebM, MP4, MOV and MKV, and saves MP3, WAV, FLAC, M4A, OGG and WebM.

Does it work on my phone?

Yes. The tools work in modern browsers on iPhone, Android, Windows, Mac and Linux. The Studio needs a desktop browser with WebGPU or WebGL2.

Ready to charge up your audio?

Free, private and instant. Drop a file and pick a tool.

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