Which audio files can I join?

Add local audio files that your browser can decode, including supported MP3, WAV or M4A recordings. Support for AAC, OGG, Opus and FLAC depends on your browser and the file’s codec. MP3 inputs are decoded and included in the resulting 16-bit PCM WAV.

Can I cut, split and join audio on the same page?

Yes. Each added clip has Start and End fields in seconds. Blank Start keeps the original beginning and blank End keeps the original end. To keep several sections of one recording, add the same file once for each section and set that copy’s times. Reorder those sections, then press Join. The total and crossfade checks use the trimmed lengths.

Is this a free online audio joiner for PC, Mac or Android?

The core tool is free and needs no account. Use a current browser on Windows, Mac or Android with file access and Web Audio support. Available input codecs and browser memory vary by device. This is browser software; no native app is supplied.

Are my files uploaded or saved?

Audio is never uploaded by this tool. Decoded clips and trim times stay in tab memory and are cleared on reload. Only sample rate, channels and crossfade settings are remembered in browser storage. Start over forgets those saved settings.

Why is the download a WAV, and how big is it?

The join is written as uncompressed 16-bit PCM WAV. Its size is 44 header bytes plus two bytes per sample per channel: one minute of stereo at 44,100 Hz is 10,584,044 bytes, about 10.6 MB. The page sizes your current join before rendering. Samples are rounded to 16-bit values and clamped at full scale; previously lost compression detail cannot be recovered.

What does the crossfade do?

A crossfade of 0 places sections end to end. A positive value overlaps each neighbouring pair by that many seconds, fading the outgoing clip down and the incoming one up. Three sections of 1, 2 and 3 seconds with a 0.25-second crossfade total 5.5 seconds. An overlap as long as the shorter section is refused. Loud overlaps can clip.

What happens with different sample rates or channels?

Choose 22,050, 44,100 or 48,000 Hz and Mono, Stereo or Match sources. Match sources uses the widest input, up to stereo. The browser resamples the clips, averages stereo into mono or copies mono to both stereo channels as needed. Inputs with more channels are folded by browser channel mixing. Each clip’s conversion is listed beside the total.

How long can the joined recording be?

The output budget is 86,400,000 samples across channels, checked on the sum of the kept sections before crossfades. That is 15 minutes of stereo at 48,000 Hz or a little over an hour of mono at 22,050 Hz. There is no file-size cap; decoding full source files can still exhaust browser memory. Remove a clip, lower the sample rate or choose mono if the budget is exceeded.

How do I reorder and preview the join?

Use each clip’s up and down buttons, which also work with the keyboard. Press Join to render the kept sections and listen in the audio player. Changing clips, trim times or output settings discards that preview, so join again before downloading the WAV.

What if an audio file cannot be processed?

An unreadable file is named in the error and left out of the list. Try a local, unprotected WAV or MP3 file supported by your browser. If audio access is blocked, enable it for the page and add the files again. For a memory error, use fewer or shorter source recordings.

¿Cómo usar el audio joiner para cortar y unir canciones?

Pulsa Add audio files y elige tus archivos locales. Escribe el inicio en Start y el final en End, en segundos; deja un campo vacío para conservar ese límite original. Usa las flechas para ordenar los fragmentos. Ajusta Crossfade si quieres solaparlos, pulsa Join para escuchar el resultado y Download WAV para guardarlo. La salida es WAV, aunque los archivos de entrada sean MP3.

Can I join audio without an internet connection?

After this page has loaded, audio decoding, trimming, joining and WAV creation run locally without an ongoing internet connection. Opening or reloading the page may need a connection. Keep the loaded tab open and use local audio files.

Audio Joiner

Join audio clips, recordings or songs into one WAV on your device in the order you set, with an optional crossfade between them. Trim each clip with start and end times, then preview the joined recording before downloading it.

Clips, in ordernone yet

Add the recordings you want joined. They stay on this device: the browser decodes each one here, and the order on this list is the order they play in.

The joinmono · 44.100 kHz

0:00.00

The total is the sum of the clips, less one crossfade for every join between them.

Sample rate

Channels

Crossfade

Total

0:00.00

Ready. Add two or more audio files, put them in the order you want, then join.

Two clips, one overlap1 s and 2 s with a 0.25 s crossfade
2.75 seconds, which is 0:02.75
Three clips, two overlapsn clips overlap n-1 times
1 + 2 + 3 less two crossfades is 5.5 seconds
This joinmono at 44.100 kHz, 16-bit PCM
Add files to size the WAV.

Trim each clip with start and end times in seconds; blank endpoints keep the original boundaries. To cut several sections from one file, add it again for each section and set that copy's times. Only the kept sections are joined. Trims and audio are cleared when you reload the page.

Clips play in the order of the Clips list, so move one up or down to change where it lands. A crossfade of 0 is a straight join; anything larger overlaps each pair by that many seconds and fades one into the other in a straight line, which is why the total is shorter than the sum. Sample rate and channels are what the finished WAV is written at, and every clip that has to be converted says so on its own line. One tab holds up to 86,400,000 samples of joined audio, which is 15 minutes of stereo at 48 kHz and a little over an hour of mono at 22.05 kHz.

The length is arithmetic, and the audio never leaves this tab. Joins and exports at the sample rate you choose, decoding every file on your own device. The total length is exact arithmetic on the decoded durations less any crossfade. Re-encoding audio that was already compressed cannot restore detail the first encoder discarded.

Common questions

Which audio files can I join?: Add local audio files that your browser can decode, including supported MP3, WAV or M4A recordings. Support for AAC, OGG, Opus and FLAC depends on your browser and the file’s codec. MP3 inputs are decoded and included in the resulting 16-bit PCM WAV.
Can I cut, split and join audio on the same page?: Yes. Each added clip has Start and End fields in seconds. Blank Start keeps the original beginning and blank End keeps the original end. To keep several sections of one recording, add the same file once for each section and set that copy’s times. Reorder those sections, then press Join. The total and crossfade checks use the trimmed lengths.
Is this a free online audio joiner for PC, Mac or Android?: The core tool is free and needs no account. Use a current browser on Windows, Mac or Android with file access and Web Audio support. Available input codecs and browser memory vary by device. This is browser software; no native app is supplied.
Are my files uploaded or saved?: Audio is never uploaded by this tool. Decoded clips and trim times stay in tab memory and are cleared on reload. Only sample rate, channels and crossfade settings are remembered in browser storage. Start over forgets those saved settings.
Why is the download a WAV, and how big is it?: The join is written as uncompressed 16-bit PCM WAV. Its size is 44 header bytes plus two bytes per sample per channel: one minute of stereo at 44,100 Hz is 10,584,044 bytes, about 10.6 MB. The page sizes your current join before rendering. Samples are rounded to 16-bit values and clamped at full scale; previously lost compression detail cannot be recovered.
What does the crossfade do?: A crossfade of 0 places sections end to end. A positive value overlaps each neighbouring pair by that many seconds, fading the outgoing clip down and the incoming one up. Three sections of 1, 2 and 3 seconds with a 0.25-second crossfade total 5.5 seconds. An overlap as long as the shorter section is refused. Loud overlaps can clip.
What happens with different sample rates or channels?: Choose 22,050, 44,100 or 48,000 Hz and Mono, Stereo or Match sources. Match sources uses the widest input, up to stereo. The browser resamples the clips, averages stereo into mono or copies mono to both stereo channels as needed. Inputs with more channels are folded by browser channel mixing. Each clip’s conversion is listed beside the total.
How long can the joined recording be?: The output budget is 86,400,000 samples across channels, checked on the sum of the kept sections before crossfades. That is 15 minutes of stereo at 48,000 Hz or a little over an hour of mono at 22,050 Hz. There is no file-size cap; decoding full source files can still exhaust browser memory. Remove a clip, lower the sample rate or choose mono if the budget is exceeded.
How do I reorder and preview the join?: Use each clip’s up and down buttons, which also work with the keyboard. Press Join to render the kept sections and listen in the audio player. Changing clips, trim times or output settings discards that preview, so join again before downloading the WAV.
What if an audio file cannot be processed?: An unreadable file is named in the error and left out of the list. Try a local, unprotected WAV or MP3 file supported by your browser. If audio access is blocked, enable it for the page and add the files again. For a memory error, use fewer or shorter source recordings.
¿Cómo usar el audio joiner para cortar y unir canciones?: Pulsa Add audio files y elige tus archivos locales. Escribe el inicio en Start y el final en End, en segundos; deja un campo vacío para conservar ese límite original. Usa las flechas para ordenar los fragmentos. Ajusta Crossfade si quieres solaparlos, pulsa Join para escuchar el resultado y Download WAV para guardarlo. La salida es WAV, aunque los archivos de entrada sean MP3.
Can I join audio without an internet connection?: After this page has loaded, audio decoding, trimming, joining and WAV creation run locally without an ongoing internet connection. Opening or reloading the page may need a connection. Keep the loaded tab open and use local audio files.

Joins and exports at the sample rate you choose, decoding every file on your own device. The total length is exact arithmetic on the decoded durations less any crossfade. Re-encoding audio that was already compressed cannot restore detail the first encoder discarded.