Merge Audio Files Online, Free — Combine MP3s Into One
File Tools Online · July 2026 · 5 min read
Podcast segments recorded separately, a stack of voice memos that need to become one file, or a batch of songs you want joined into a single continuous track — merging audio files online should be as simple as uploading everything and getting back one combined file, without a per-file cap or a paywall on formats.
How Audio Files Get Combined
This tool joins multiple audio files into one continuous file using FFmpeg's concat method, combining files uploaded in a ZIP archive in alphabetical order — a straightforward way to control the sequence by naming your files accordingly (01-intro.mp3, 02-segment.mp3, and so on).
Podcast, Audiobook, and Voice-Memo Use Cases
Merging is especially common for assembling podcast episodes recorded in separate takes, joining audiobook chapters into fewer files, and combining a run of WhatsApp or phone voice memos into a single recording for easier listening or archiving.
How to Merge Audio Files Online
- Create a free account — no credit card required.
- Go to Tools → Audio Tools → Audio Merge.
- Upload a ZIP archive containing the MP3 or WAV files you want combined.
- Download the single merged audio file.
- Your source files are deleted from the server within 30 minutes.
Try it free — no credit card required
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Use Audio Merge Now →Related Reading
Want a smoother transition between tracks instead of a hard cut? See our guide on crossfading two audio tracks for seamless transitions.
Frequently Asked Questions
How do I combine multiple MP3 files into one?
Upload a ZIP containing all the MP3 files, and the tool joins them into a single continuous audio file.
Can I merge different audio formats together, like MP3 and WAV?
Yes, mixed formats within the same ZIP archive are supported and joined into one output file.
What order are the files merged in?
Files are combined in alphabetical order based on filename, so naming files 01-, 02-, 03- and so on controls the final sequence.
Is there a limit on how many audio files I can merge?
No fixed count limit beyond your plan's overall file-size allowance.
What output format do I get?
The merged file is delivered as a standard MP3.