Trim and Join Audio Without Leaving Your Browser
Need to stitch together an interview from separate recordings? Combine voice clips into one file? Cut silence from the start and end of each segment before merging?
Most tools for this require an account, an upload, or a subscription. This one doesn't. Drop your audio files in, trim each clip, reorder them if needed, and download the result. Everything runs in your browser.
Why In-Browser Processing Matters
Uploading audio to a third-party server means handing over your recordings — interview raw cuts, music drafts, voice notes — to hardware you don't control. Most services store those files longer than you'd expect.
This tool runs FFmpeg via WebAssembly, directly in your browser. No file ever leaves your device. Once the tool loads, it works without an internet connection. Your audio stays yours.
How It Works
- Drop your files. Drag and drop one or more audio files, or click to browse. Each file appears as a waveform row.
- Trim each clip. Drag the start and end handles on any waveform to cut the portion you want to keep. Everything outside the handles is discarded.
- Reorder the segments. Use the up and down arrows on each row to arrange clips in the order they should play.
- Preview before you commit. Hit play to hear the full joined sequence. Click anywhere on a waveform to jump to that point. Spacebar toggles play and pause.
- Choose a format. Pick MP3, WAV, or M4A as your output.
- Join and download. One click processes all segments and triggers a download.
No account required.
Supported Output Formats
- MP3 — universal playback, compact file size
- WAV — uncompressed, full quality
- M4A — efficient compression, native to Apple devices
What You Can Build With It
- Podcast episodes from separate recorded segments
- Voice demos assembled from multiple takes
- Audiobook chapters joined from individual scene recordings
- Music sketches stitched from loop fragments
- Interview clips with silence and off-topic sections trimmed out
What It Costs
Free. No limits, no credit card, no catch. Built as a public utility — the same philosophy behind our audio converter and transcription tool.
Technical Details
- Engine: FFmpeg compiled to WebAssembly — the same tool audio professionals use on the command line
- Trimming: Each segment is trimmed to a normalised WAV before joining, which keeps audio quality consistent regardless of the source format
- Performance: Processing runs on a background thread so the page stays responsive
- Cancellation: Changed your mind mid-process? Hit Cancel and the job stops immediately — no partial file, no waiting
- Privacy: Zero network requests during processing. Fully offline after the initial load.
Get Started
Open the audio joiner, drop your files, and trim away. No sign-up, no waiting, no strings attached.