Tools
5 min read
February 4, 2026

How to Merge Multiple Audio Files Into One Track (Free Online Tool)

Stitching together intro music, voiceovers, and outros used to require a DAW. Here's how to do it free, in your browser, in under a minute.

Common Reasons to Merge Audio

  • Combining intro music + voice recording + outro into one podcast episode
  • Joining several voice memos into a single file
  • Stitching sound effect clips into a sequence
  • Creating a continuous mix from multiple tracks
  • How Our Merger Keeps Quality Consistent

    Mixing files of different formats and bitrates can cause glitches at the seams. Our Audio Merger first re-encodes every input to a consistent intermediate format, then stitches them with ffmpeg's concat demuxer — producing a single, seamless MP3 with no clicks or quality drops between segments.

    Step-by-Step

  • Open the Audio Merger
  • Upload up to 15 audio files (200MB total)
  • Drag to reorder clips into the sequence you want
  • Click merge and download one combined MP3
  • Best Practices

  • Trim each clip first with the Audio Trimmer to remove dead air before merging
  • Keep source files in similar formats/bitrates when possible for the cleanest result
  • Preview the order carefully — once merged, you'll need to re-upload to change the sequence
  • Frequently Asked Questions

    How many files can I merge at once?

    Up to 15 files, with a combined size limit of 200MB.

    Will there be gaps or clicks between clips?

    No — clips are re-encoded to a consistent format and joined with ffmpeg's concat demuxer for seamless transitions.

    What if my files are in different formats (MP3 + WAV)?

    No problem — the tool automatically converts each clip to a consistent intermediate format before merging.

    After Merging

    Once merged, you can convert the final track to another format (WAV, FLAC, AAC) or trim the combined file to remove any unwanted sections.

    Written by the GMC Tools team