How to merge audio files
Start with at least two local tracks. Merge Audio joins each ready track end to end in the order you set, with an optional silence gap or crossfade between adjacent files. The page reads and processes the selected audio in your browser; the merge code does not send it to a server.
- Add at least two files with
Drop audio files hereor choosebrowse files. - Wait for the files to finish reading, then use
Removeon any row with an error. - Drag ready rows, or use
Move upandMove down, to set the order. - Choose
Output format. SetBitratewhen it appears, along withSample rate,Channel layout,Metadata, andNormalization. - Choose a
Boundary between filesoption, selectMerge, preview the result, and selectDownload merged audio.
How to join MP3 and WAV files in order
The file picker accepts audio files through audio/*. The page lists MP3, WAV, FLAC, AAC/M4A, OGG, Opus, and more. A file without a readable audio track is excluded. Merge remains unavailable until two files are ready.
Input: MP3 + WAV
Order: MP3, then WAV
Output format: MP3
Result: one MP3 fileThe boundary preview estimates the output length. Reordering changes the sequence. The source files are read and never modified.
What Boundary between files changes
Back-to-back - no gap, no crossfade places each file next to the previous one. Silence gap inserts the entered number of seconds between every pair. Its visible default is 1 second, and 0 seconds leaves the files back to back.
Back-to-back: A + B
Silence gap, 1 second: A + silence + B
Crossfade, 1 second: A overlaps B at the joinCrossfade overlaps adjacent files for the entered duration. Its visible minimum is 0.1 seconds. A duration that does not fit the audio can make the merge fail. The preview updates the estimated total length for the selected boundary.
What Output format changes
The Output format menu has MP3, AAC (M4A), FLAC, WAV, OGG Vorbis, and Opus. Bitrate appears for lossy formats and has 96, 128, 192, 256, or 320 kbps. Sample rate can keep the first file's rate or use 22,050 Hz, 32,000 Hz, 44,100 Hz, 48,000 Hz, or 96,000 Hz. Channel layout can keep the first file's layout, Mono, or Stereo.
Metadata can keep the first file's tags, strip all metadata, or set a custom Title and Artist. Normalization can keep source loudness or target Streaming (-14 LUFS), Podcast (-16 LUFS), or Broadcast (-23 LUFS). Each source is decoded and encoded into the selected output, so FLAC or WAV cannot restore quality already lost in a lossy source.
What happens when audio files differ
The merge converts every ready source to the selected sample rate and channel layout before encoding one output. Resampling, channel conversion, and lossy output formats can change the samples.
Unsupported or corrupt data can show Could not read this file - unsupported or corrupt audio data. The implementation does not state a numeric maximum for file count, duration, or size.
Where merging audio files comes up
For spoken clips, place the rows in order, add a Silence gap between segments, and choose Podcast (-16 LUFS).
For a music sequence, combine MP3 and WAV with Back-to-back - no gap, no crossfade, preview the output, and download it in the chosen format.
When to use Audio Merge Tools
Use Merge Audio when tracks should play one after another with a chosen order and boundary. The Audio Merge Tools category covers sequential joining tools. Choose a multi-track editor when sounds must play at the same time.
Frequently asked questions
How do I merge audio files into one?
Add at least two readable files, arrange the rows, choose Merge, then select Download merged audio after the result appears.
Can I join MP3 and WAV files?
Yes, if both files have readable audio tracks. The selected sample rate, channel layout, and output format are used for the joined file.
Does Merge Audio mix tracks together?
Merge Audio joins tracks end to end in the order you set. It does not mix simultaneous tracks.
Can I add a gap or crossfade when merging audio?
Choose Silence gap or Crossfade under Boundary between files. The setting is applied between each adjacent pair.
Does Merge Audio upload my files?
No. The page reads the selected audio files locally in your browser, and the merge code does not send the audio to a server.