Audio Joiner, Combine & Merge MP3, WAV, M4A Clips Online
Drop several clips, drag them into the order you want, and they play back as one continuous track. Preview the whole sequence, then download a single seamless WAV or a compact MP3, gap-free, entirely in your browser, never uploaded.
What is the audio joiner?
The Audio Joiner concatenates several clips into one continuous track. Drop multiple MP3, WAV, M4A or OGG files, drag to reorder them, and they stitch end-to-end on exact sample boundaries with no gaps or drift. Preview the whole sequence, then download one seamless WAV or MP3. Each clip decodes on your device, so nothing is uploaded.
The GigAI Audio Joiner takes the tracks you drop (two songs, ten voice memos, a set of podcast segments, a run of sound effects) decodes each one natively with the browser's Web Audio API, and joins them end-to-end into a single continuous file. Add files in any order and drag them up or down the list to sequence them exactly how you want. A running total shows the combined length before you commit. Because each clip is decoded on your device, there's no upload bar and no queue, even a dozen files stitch together in a moment. Press preview and the whole joined track plays back as one, so you catch a clip that's out of order or a jarring transition before you export, not after. When the sequence is right, download a lossless 16-bit WAV, bit-for-bit faithful to your sources and perfect for further editing, or a compact MP3 for sharing, uploading or setting as one long track. Clips at different sample rates or channel counts are reconciled automatically so the output is a single clean file. The join is gap-free by construction: Web Audio concatenates on exact sample boundaries, so there's no silence inserted between clips and no drift. And all of it happens in the tab: unreleased music, personal recordings, confidential interviews and private notes are never uploaded, stored or logged. No account, no watermark, no install, close the tab and every byte is gone.
- Difficulty:
- Medium
- Typical time:
- ~30s
- Processing:
- 100% browser processing
Last updated
How to use the audio joiner
- 1
Drop your clips
Drag several MP3, WAV, M4A, OGG or FLAC files onto the workspace, or click to browse and multi-select. Each decodes locally in a moment and joins the list with its name and length.
- 2
Put them in order
Move each clip up or down the list until the sequence is exactly how you want it. Add more files at any time, or remove one you don't need, the combined length updates live.
- 3
Preview the joined track
Press preview to hear all the clips play through as a single continuous track, checking the order and the transitions before you export.
- 4
Choose a format and join
Pick lossless WAV or compact MP3 (and an MP3 bitrate if you like), then run the join: it's near-instant since it's native Web Audio, not a WASM re-encode.
- 5
Download or start over
Preview the finished file, check its size, and download it, or reset and build a different sequence from a new set of clips.
What Audio Joiner includes
Join clips end-to-end, gap-free
Drop several files and they concatenate on exact sample boundaries. No silence inserted, no drift between clips, just one continuous track that flows straight from one into the next.
Reorder by dragging
Add files in any order, then move each one up or down the list until the sequence is exactly right. A running total shows the combined length as you go.
Preview the whole sequence
Hear the joined track play through as one before you export, so you catch a clip that's out of order or an abrupt transition while it's still easy to fix.
Mixed formats reconciled automatically
Clips at different sample rates or channel counts are decoded and combined into one clean output, join an MP3 to a WAV to a voice memo without worrying about the details.
Lossless WAV or compact MP3
Export a bit-perfect 16-bit WAV for further editing, or a small MP3 for sharing and uploading. WAV is written natively. The MP3 encoder loads only when you pick MP3.
100% private, nothing uploaded
Every clip is decoded, joined and encoded in your browser. Unreleased tracks, personal recordings and confidential interviews are never uploaded, stored or logged.
Why use our audio joiner
One file out of many, in seconds
Instead of chaining exports through a DAW, drop your clips, order them and download a single track. The whole join runs on-device with no upload wait and no queue.
No gaps, no guesswork
The concatenation is sample-exact, so clips butt together cleanly with no inserted silence and no timing drift, the join sounds like one recording, not a patchwork.
Lossless when you need it
The WAV path re-compresses nothing, so a joined track stays bit-for-bit faithful to your sources: ideal for dropping into a podcast edit, a DAW or another GigAI audio tool.
Private by design
Because nothing leaves the tab, you can combine sensitive material (a set of confidential notes, an unreleased demo, personal voice memos) without trusting it to a server.
Built for the way you work
From quick one-off fixes to daily workflows, see how people put this tool to use.
- Podcaster / Editor
Stitch segments into one episode
Join an intro, the main recording, an ad read and an outro into a single continuous file, gap-free and lossless, ready to drop into your publishing tool.
- Musician / DJ
Chain tracks into one long mix
Put two songs together back-to-back, or line up a run of tracks into a single continuous file for a set, a demo reel or an uninterrupted upload.
- Anyone with a phone
Combine voice memos into one file
Merge a series of voice notes (a lecture recorded in parts, a set of reminders, a story told in pieces) into one file you can send or archive in a single share.
- Privacy-conscious user
Assemble sensitive audio locally
Combine confidential recordings, legal notes or unreleased demos entirely on your device, so nothing is ever uploaded to a stranger's server to be joined.
Supported formats
Accepts MP3, WAV, M4A, AAC and OGG, and produces WAV and MP3, all processed locally in your browser.
- MP3
- WAV
- M4A
- AAC
- OGG
- FLAC
- OPUS
- WebM
- WAV
- MP3
Frequently asked questions
Recommended tools
Audio Trimmer
Trim audio in your browser with a real waveform: drop an MP3, WAV, M4A or OGG, drag a selection to keep exactly the part you want, preview it, then download a lossless WAV or a compact MP3. Sample-accurate and 100% private. Nothing is uploaded.
Audio Cutter
Cut a section out of the middle of an audio file in your browser. Drop an MP3, WAV, M4A or OGG, drag a selection over the real waveform to mark the part to delete, and the audio before and after is joined into one seamless clip. Download a lossless WAV or compact MP3. Sample-accurate and 100% private. Nothing is uploaded.
MP3 Converter
Convert any audio to MP3 in your browser, WAV, M4A, AAC, OGG, FLAC and more to a clean, universally-playable MP3 with a bitrate you choose. Preview the waveform, encode locally with lamejs, then download. Nothing is uploaded.
Audio Fade In / Out
Add a smooth fade-in and fade-out to audio in your browser with a live waveform. Drop an MP3, WAV, M4A or OGG, set the fade lengths, watch the volume ramp painted right on the wave, preview it, then download a lossless WAV or a compact MP3. Sample-accurate and 100% private. Nothing is uploaded.
Audio Merger
Merge multiple audio files into one in your browser. Drop MP3, WAV, M4A or OGG clips, drag to set the order, add an optional crossfade to smooth the joins, then download a single lossless WAV or compact MP3. 100% private. Nothing is uploaded.
Audio Reverse
Reverse audio in your browser: drop an MP3, WAV, M4A or OGG and it plays backwards, sample-for-sample. See the waveform, preview the reversed track, then download a lossless WAV. Instant, exact and 100% private. Nothing is uploaded.
Common problems, solved
Hit a snag? Here are quick fixes for the issues people run into most.
One of the files won't load or shows a decode error.
The browser couldn't decode that codec natively, usually a niche or DRM-protected file. Swap in a standard MP3, WAV, M4A or OGG, or convert the odd one out with the Audio Converter first, then add the result to the join.
The clips joined in the wrong order.
Order is set by the list, not by when you dropped the files. Drag or move each clip up or down until the list reads top-to-bottom in the sequence you want, then preview to confirm before exporting.
The tab is slow or ran out of memory with lots of files.
In-browser joining holds every clip and the combined track in RAM. Close other heavy tabs and retry. If it still struggles, join in a few smaller passes, or work on a device with more memory.
The exported MP3 sounds slightly softer than the sources.
MP3 is lossy, so a single re-encode is unavoidable on that path. Raise the MP3 bitrate for music, or export WAV instead to keep the joined track bit-for-bit identical to your originals.
Get the most out of it
Preview the whole sequence before exporting: it's the fastest way to catch a clip that landed out of order or a transition that jars.
Choose WAV when you'll keep editing the joined track (it's lossless) and MP3 only when you need a small file to share or upload.
Want tighter transitions? Trim the silence off the start and end of each clip with the Audio Trimmer first, then join the clean pieces here.
Joining lots of clips? Reconciling everything to one sample rate is automatic, but a set that's already the same rate joins fastest.
Big batch running slow? Close other heavy tabs (in-browser audio is memory-bound) or join in two or three smaller passes.
What's new
Recent updates and improvements to the audio joiner.
Initial release. Drop multiple clips, decode each natively, join them end-to-end with a native Web Audio concat, and export a lossless WAV with one-click download.
Added drag-to-reorder of the clip list with a live combined-length total, full-sequence preview, and compact MP3 export with a selectable bitrate (encoder lazy-loaded only when MP3 is chosen).
Automatic reconciliation of mixed sample rates and channel counts, a before/after size readout on the result, and improved honest guidance and memory handling for large batches.
Keep exploring
Problems we solve
Definitions
From the blog
- How to Merge Video Clips Into One File (Without Re-Encoding When You Can)
- How to Merge Audio Files Into One Track (Without Losing Quality)
- How to Remove Silence From Audio (Tighten Recordings and Podcasts)
- How to Extract Audio From a Video: Save the Sound as MP3
- How to Edit a PDF for Free: Merge, Split, Rotate, Delete Pages and Sign
Explore categories
Compare formats
By file type
Common tasks
Your privacy is built in
Every clip is decoded, joined and encoded entirely in your browser using the native Web Audio API: nothing is ever uploaded to any server. No file is stored, logged or transmitted, so you can safely combine confidential interviews, personal voice notes and unreleased music. WAV export is a lossless, native operation and the MP3 encoder is only loaded if you choose MP3. There is no cloud copy and no upload step. Close the tab and every byte is gone.
- Runs in your browser
- No uploads
- Nothing stored
Ready to try the audio joiner?
Free, private and instant. Audio Joiner runs right in your browser.