AAC Joiner
Merge AAC files into one. Nothing is uploaded.
Drop audio files to join
Add two or more files. MP3, WAV, M4A, OGG, FLAC and more
Your files never leave your browser.
More audio joiners
Every audio format has its own page, like MP3 Joiner or WAV Joiner. Pick one to open it.
AAC joiner online
AAC (Advanced Audio Coding) is a compressed format that sounds better than MP3 at the same size. This AAC joiner merges .aac files into one. Put the tracks in order, add a gap or crossfade, cut the silence, preview the result and save it as WAV or MP3, all in your browser.
- Join as many AAC files as you need. Add up to 30 files at once, or drop them in one by one. Different formats can be mixed in the same project.
- Reorder in one tap. Move any track up or down, or remove it. The timeline updates straight away so you can see the final order.
- Gap or crossfade. Leave a short silence between tracks, or overlap them with a smooth equal-power crossfade.
- Silence cutter. Trim dead air from the start and end of every track, or shorten long silent gaps, so the clips join tight like a remix.
- Preview the whole result. Play the joined audio from any point, scrub the timeline and loop it before you download.
- WAV or MP3 export. Save lossless WAV, or MP3 at 96 to 320 kbps. AAC files are opened and joined, then saved in the format you pick.
- Private by design. Joining happens in your browser. Your audio is never uploaded or stored.
Uses of a AAC joiner
- AAC is used for streaming, video soundtracks and phone recordings. Join several AAC files into one so there is a single file to play, share or upload.
- Podcasts and voice recordings. Put an intro, the main recording and an outro into one episode file.
- Music mixes and playlists. Combine songs into one continuous track, with crossfades between them.
- Audiobooks and lectures. Merge chapters or recorded parts into a single file.
- Voice messages and interviews. Stitch short clips together so they can be shared as one.
AAC joiner questions
How do I join AAC files?
Choose two or more AAC files, put them in the order you want, press Play to check the result and then download it. Everything runs in your browser, so nothing is uploaded.
Can I join AAC with other formats?
Yes. Any formats your browser can play work together, which usually includes MP3, WAV, M4A, AAC, OGG, Opus and FLAC. Sample rates and mono or stereo files are matched automatically.
Will joining lower the quality of AAC audio?
AAC is a compressed format. Saving as WAV keeps the decoded audio as it is. Saving as MP3 compresses it again, so use a high bitrate like 192 kbps or more.
Is the joined file saved as AAC?
Yes. AAC is preselected under Save as, so AAC files in give you a AAC file out. You can also choose another format, such as MP3 or WAV.
What is the difference between AAC and M4A?
AAC is the way the sound is compressed. M4A is a file container that usually holds AAC audio. The joiner opens both.
What is the difference between a gap and a crossfade?
A gap adds silence between tracks. A crossfade overlaps the end of one track with the start of the next, fading one out while the other fades in. A crossfade makes the final file shorter by the overlap.
Is there a size limit?
Each file can be up to 200 MB, you can add up to 30 files and the total length can be up to 3 hours.
Does it work on a phone or tablet?
Yes. The buttons are large enough for touch and the layout adapts to any screen.