Guide5 min read
How to Join Audio Files Online (Free, No Upload)
Combine multiple audio files into one, in the order you choose, right in your browser. No upload, no account. Works with MP3, WAV, M4A, OGG, and FLAC.
Audio joiner
Combine multiple audio files into one — free, instant, and private. Nothing is uploaded.
Drop two or more audio files here, or click to browse
MP3, WAV, M4A, OGG, or FLAC — up to 2GB each
✓Free forever
✓Runs locally
✓No account
✓No watermark
Everything you need to join audio fast
Join files in any format
Mix MP3, WAV, M4A, OGG, and FLAC in the same join — each file is normalized automatically before combining.
Reorder before you join
Drag and drop, or use up/down arrows, to put your files in exactly the playback order you want.
Choose your output format
Export the combined file as MP3, WAV, M4A, OGG, or FLAC — whichever fits where you're using it next.
One clean output file
Every input file becomes a single continuous track, ready to download in one click.
Join up to 20 files
Combine as many as 20 audio files in one pass — no need to join two at a time and repeat.
Private by design
Your audio never leaves your device. PixelTools runs entirely in your browser using ffmpeg.wasm — zero server uploads, zero data stored.
Three steps to join your audio
- 1
Add your audio files
Drag and drop two or more audio files onto the page, or click to browse. Supports MP3, WAV, M4A, OGG, and FLAC files up to 2GB each.
- 2
Put them in order
Drag to reorder, or use the up/down arrows on each file — the final track plays back in the order shown, top to bottom.
- 3
Choose a format and join
Pick MP3, WAV, M4A, OGG, or FLAC for the output, then join. Everything runs instantly in your browser — nothing is uploaded to any server.
Built for anyone who needs to combine audio into one file
Whether you're stitching podcast segments into an episode, merging album tracks into a continuous mix, or joining a multi-part recording back together — PixelTools joins it in your browser in seconds.
Combining podcast segments into one episode
Join an intro, main recording, and outro — recorded separately — into a single publish-ready episode file.
Merging album tracks into one continuous file
Combine individual song files into a single gapless-feeling file for a DJ set, mixtape, or continuous playback.
Stitching together a multi-part recording
Join separate recording-session files — split by an app's time limit or a pause between takes — back into one file.
Building a single voiceover or audiobook chapter
Combine multiple narration takes recorded separately into one continuous audio file for a chapter or segment.
Frequently asked questions
Is PixelTools' audio joiner free?
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Yes, completely free with no limits. Join as many audio files as you want, as often as you want. No subscription, no trial, no account required.
Are my audio files uploaded to a server?
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No. PixelTools joins audio entirely in your browser using ffmpeg.wasm. Your files never leave your device — there is no server upload, no cloud processing, and no data stored anywhere.
Can I join files that are in different formats?
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Yes. You can mix MP3, WAV, M4A, OGG, and FLAC files in the same join — PixelTools normalizes each one before combining them, then encodes the final result in whichever output format you choose.
How many files can I join at once?
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Up to 20 audio files in a single pass. Add more, remove any you don't need, and reorder them before joining.
Can I control the order the files play back in?
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Yes. Drag any file to a new position in the list, or use the up/down arrow buttons — the joined output plays back in exactly the order shown.
What's the difference between this and the Audio Splitter?
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The Audio Splitter divides one file into several separate files. The Audio Joiner does the opposite — it combines several separate files into one continuous file.
Will joining reduce my audio's quality?
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PixelTools re-encodes the combined output at a high-quality setting for your chosen format (for example, MP3 at a high VBR quality, or lossless PCM for WAV and FLAC), so the difference from the originals is minimal to inaudible for typical listening.
How is this different from other online audio joiners?
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Most sites that offer audio joining upload your files to a server, cap how many files or how much total length you can combine, or limit you to a single output format. PixelTools joins entirely in your browser with no upload, no file-count limit beyond 20 per pass, and a choice of five output formats.