Does it crossfade or hard-cut?

Both. Default is hard-cut (files join exactly end-to-end). Toggle crossfade for smooth transitions; set the fade duration in milliseconds.

Yes — drag to reorder in the queue before merging. The output follows the visible order.

What about different sample rates?

Auto-resampled to match the first file's sample rate. This avoids a mismatch that would sound like stuttering or pitch shift.

Any format the Audio Converter accepts. The merger standardizes internally and exports to your chosen format.

Join multiple clips back-to-back into one track. Part of the DevTools Surf developer suite. Browse more tools in the Audio collection.

Audio concatenation is one of the simplest operations in digital signal processing — for uncompressed formats, it is literally appending raw sample bytes.
Professional DAWs (Digital Audio Workstations) like Pro Tools process audio at 96kHz or 192kHz sample rates, but 44.1kHz remains the CD standard since 1980.
The first digital audio workstation, Soundstream's editing system, was built in 1977 by Thomas Stockham and could splice audio non-destructively.

Does it crossfade or hard-cut?: Both. Default is hard-cut (files join exactly end-to-end). Toggle crossfade for smooth transitions; set the fade duration in milliseconds.
Can I reorder files?: Yes — drag to reorder in the queue before merging. The output follows the visible order.
What about different sample rates?: Auto-resampled to match the first file's sample rate. This avoids a mismatch that would sound like stuttering or pitch shift.
File format compatibility?: Any format the Audio Converter accepts. The merger standardizes internally and exports to your chosen format.

Join multiple clips back-to-back into one track. Part of the DevTools Surf developer suite. Browse more tools in the Audio collection.

Audio concatenation is one of the simplest operations in digital signal processing — for uncompressed formats, it is literally appending raw sample bytes.
Professional DAWs (Digital Audio Workstations) like Pro Tools process audio at 96kHz or 192kHz sample rates, but 44.1kHz remains the CD standard since 1980.
The first digital audio workstation, Soundstream's editing system, was built in 1977 by Thomas Stockham and could splice audio non-destructively.

Does it crossfade or hard-cut?: Both. Default is hard-cut (files join exactly end-to-end). Toggle crossfade for smooth transitions; set the fade duration in milliseconds.
Can I reorder files?: Yes — drag to reorder in the queue before merging. The output follows the visible order.
What about different sample rates?: Auto-resampled to match the first file's sample rate. This avoids a mismatch that would sound like stuttering or pitch shift.
File format compatibility?: Any format the Audio Converter accepts. The merger standardizes internally and exports to your chosen format.