Does merging audio files reduce the quality?

To ensure seamless playback across all devices, the tool re-encodes the final merged file to a high-quality 192kbps MP3. This guarantees compatibility even if you mix different source formats like WAV and M4A.

Is my audio uploaded to a server?

Absolutely not. All processing happens locally in your browser using WebAssembly. Your files never leave your device.

How many files can I merge at once?

There is no strict limit. You can merge as many files as your device's memory can comfortably handle. For most modern computers and phones, merging 10-20 files simultaneously works perfectly.

Audio Merger

Merge and combine multiple MP3, WAV, or audio files into one single track locally in your browser. Zero file size limits, no uploads.

Select your file here to get started

or drop your file here.

.mp3.wav.m4a.ogg.flac.aac

Max 1000MB. 100% Private. Files never leave your device.

What to expect

Experience fast, secure, and completely private processing directly inside your web browser.

Zero File Size Limits

Merge short voice notes or hour-long podcast episodes without arbitrary server-side restrictions.

Seamless Format Mixing

Combine different formats (e.g., a WAV voice note and an MP3 music track) and get a perfectly standardized MP3 output.

Absolute Privacy

Your files are processed entirely within your device's local memory. Nothing is ever uploaded to a server.

How it works

Simply upload your content, adjust your settings, and download the result instantly.

Upload Audio Files

Select or drag and drop multiple audio files (MP3, WAV, M4A, OGG) into the browser editor.

Drag to Reorder

Use the drag handles to arrange your tracks in the exact order you want them merged.

Merge & Download

Click merge to seamlessly stitch the files together locally and download your combined track instantly.

Frequently Asked Questions

Get quick answers about supported formats, data privacy, and using this tool.

Audio Merger - Merge and combine multiple MP3, WAV, or audio files into one single track locally in your browser. Zero file size limits, no uploads.

About This Tool

Stitch together multiple audio files seamlessly directly in your web browser without sending your recordings to an external server. Whether you are combining an intro music track with a voice recording, merging podcast segments, or creating a custom meditation mix, this tool handles it locally. Unlike traditional online mergers that force you to wait in server queues or cap your file sizes, our tool uses advanced FFmpeg WebAssembly processing right in your browser. This gives you instant, seamless joins with zero upload lag. Privacy remains absolute because your files never leave your device, making it safe for confidential interviews, unreleased music, or sensitive voice notes.

audio mergermp3 joinercombine audiomerge trackslocal audio editor

100% Open Source & Trustworthy

Every tool on PrivateTools is fully open source and runs entirely in your browser. No server uploads. No tracking. No hidden code. You can verify the source code yourself on GitHub at any time.

Open Source Code

Full source code available on GitHub — inspect, fork, or contribute.

Verify & Audit

Read every line of code. Nothing is hidden. Total transparency.

Browser-Local Processing

Files never leave your device. Zero server uploads. 100% private.

Community & Support

PrivateTools is built by the community, for the community. Found a bug? Have a tool idea? Want to report an issue? We'd love to hear from you. Every contribution makes these tools better for everyone.