Merge and combine multiple audio files with crossfade. Free, private, runs in your browser.
100% private — your files never leave your browser. All processing happens locally on your device.
Drop MP3, WAV, OGG, FLAC, M4A, AAC, or WebM files here, or click to browse
Audio merging (also called audio joining or concatenation) combines multiple audio files into a single continuous file. This is commonly used for creating mixtapes, combining podcast segments, assembling audiobook chapters, merging voice recordings, and creating continuous background music from multiple tracks. Advanced merging includes crossfading between tracks for smooth transitions and adding silence gaps between segments.
Combining audio files typically requires a desktop audio editor, which means installing software, learning its interface, and manually aligning tracks on a timeline. This tool simplifies the entire process: upload your files, arrange them in order, set crossfade or gap durations, and download the merged result. It handles format mismatches automatically — you can combine MP3, WAV, and OGG files in a single merge without worrying about sample rates or codecs.
Add multiple audio files via drag-and-drop or file browser. Reorder tracks with up/down controls. Configure crossfade duration (for smooth blending between tracks) or gap duration (for silence between tracks). Choose your output format (MP3, WAV, or OGG) and click Merge. The tool uses FFmpeg WebAssembly to normalize audio formats, apply crossfade filters, and concatenate tracks into a single high-quality output file.
Yes. All audio processing happens in your browser using FFmpeg WebAssembly. Your files are never uploaded to any server. This is safe for unreleased music, confidential recordings, and any audio you want to keep private.
You can merge as many audio files as you want. Add files, reorder them, and they'll be concatenated in your specified order.
Yes. Set a crossfade duration (1-10 seconds) and tracks will smoothly blend into each other instead of cutting abruptly.
Yes. You can combine MP3, WAV, OGG, and other formats. FFmpeg normalizes them during the merge process.
Yes. All processing happens in your browser using FFmpeg WebAssembly. Your audio files never leave your device.