Audio Joiner Online Free

A free browser-based audio joiner with per-clip volume, trim, fade in/out, crossfade curves, EQ, and loudness normalization. Merge MP3, WAV, FLAC, OGG and 5 more formats — no limits.

How to Merge Audio Files

1
Upload Files

Drag and drop or browse to add 2 or more audio files. All common formats are supported.

2
Arrange & Edit

Drag tracks to reorder. Expand each track to adjust volume, trim, fade in/out, and EQ. Set transitions between tracks.

3
Preview

Click Play to hear the merged result in real-time before exporting. Seek to any position.

4
Export & Download

Choose your output format and quality, click Join, and download the merged file.

Combine, trim, crossfade, and normalize multiple audio tracks into one

📁
Drop files or browse
Drop 2 or more audio files to join them into one
MP3, WAV, OGG, FLAC, M4A, AAC, OPUS…

Add at least 2 audio files

0 tracks · 0:00
Match loudness across all tracks to a consistent level
Processing…
Processing cancelled. You can start again when ready.

Features

Per-Clip Editing Smart Transitions Loudness Normalization

Frequently Asked Questions

How many files can I merge at once?

Up to 50 files totaling 500 MB. Each file can be up to 200 MB. The practical limit depends on your device's memory, but most use cases (2–20 files) work without issues.

Can I merge files of different formats?

Yes. You can combine MP3 with WAV, FLAC with OGG, or any other combination. The tool automatically converts all tracks to a common format before merging.

What are crossfade curves?

Crossfade blends the end of one track into the start of the next. Linear fades at a constant rate. Equal Power maintains perceived loudness during the transition. Logarithmic creates a faster initial fade that slows down.

Does merging reduce audio quality?

Lossless formats (WAV, FLAC) preserve full quality. For lossy formats (MP3, OGG), you can choose bitrate up to 320 kbps. The tool resamples everything to 48 kHz stereo for consistent output.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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How do you rate this tool?

4.3
(36 ratings)
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Comments

Annie
4 weeks ago

I love it 💖

Who is this tool for?
🎵 Musicians & Producers 🎙️ Podcasters 🎛️ Sound Engineers ✨ Content Creators 📖 Audiobook Narrators
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