Free Online Audio Joiner
Merge and combine multiple audio files into a single MP3 — drag to reorder, preview, and download. Works with MP3, WAV, FLAC, AAC, OGG, M4A. Runs entirely in your browser, on your own device.
Getting the upload area ready…
This only takes a moment
Join Your Audio Tracks
Drop multiple audio files, drag the order, and download the stitched MP3.
Drop your audio files here
or click to browse files
Supports MP3, WAV, AAC, OGG, FLAC, M4A — pick two or more
Features
Multi-Format, One Output
Mix MP3, WAV, FLAC, AAC, OGG and M4A in one batch — the joiner normalizes each track and merges them into a single MP3 without format fights.
Drag to Reorder
Upload in any order, then drag tracks up or down to set the sequence. The final MP3 follows your list exactly.
Auto Sample-Rate Normalization
Every input is matched to a common 44.1 kHz stereo standard before merging — no pops, clicks or speed issues when joining tracks recorded at different rates.
Gapless Merge
Files are merged back-to-back so there is no silent gap, no crossfade, no surprise — just the tracks played one after another.
Quality Output, Small Files
The joined MP3 is encoded at a high quality setting — transparent for voice and music, and a fraction of the size of an uncompressed file.
Voice & Music-Safe
The encoder allocates more quality to complex sections, keeping speech natural and music detailed while silence stays compact.
Fast, Seconds-Scale
Joining 10 tracks of a few minutes each typically takes under a minute. Audio-only processing is far faster than video.
Instant Playback
Output MP3 is optimized to play immediately in browsers, players and podcast apps — no waiting, no conversion on the player side.
100% Private & Free
Your audio never leaves your device. The joiner runs right in your browser tab — no server, no upload, no tracking.
Zero Server Upload
Files are read, joined and downloaded entirely on your own machine. We never see the tracks or the joined output.
No Watermark
Clean output — no audio intro, no brand tag, no metadata injected. Your audio, untouched.
Works Everywhere
Any modern browser on any device — Chrome, Firefox, Safari, Edge, desktop or mobile.
Loved by creators, students & researchers
Why people use BibiGPT to turn videos into text every day.
Trusted by 50,000+ users worldwide
“I paste a link and get clean captions in seconds — it saves me hours of retyping every single week.”
Maya R.
Content Creator · Repurposes short videos
“Exporting the transcript lets me review new words at my own pace instead of pausing the video constantly.”
Daniel K.
Language Learner · Studies with real videos
“Accurate, timestamped text I can quote directly. It has quietly become part of my daily workflow.”
Priya S.
Researcher · Cites public talks
FAQ'S
Frequently Asked Questions
Ask us anything!
Popular guides
1 Bilibili AI Video Summary Tool: BibiGPT Summarizes 30+ Platforms Instantly (2026)
Best Bilibili AI video summary tool 2026? Paste a link for a free AI recap, mind map, and transcript-style takeaways on 30+ platforms — no login needed.
2 How to Install Skills in DeepSeek Harness: A Hands-On Guide to Teaching dsh to Watch Videos
Install a video-summary skill into DeepSeek Harness in one copy-paste — SKILL.md matches Claude Code. Or skip dsh: paste a Bilibili or YouTube link in the browser and get a timestamped summary.
3 How to Reverse a Video Without an App — Free, In-Browser, No Download (2026)
Reverse any video free with no app and no download, right in your browser. Step-by-step for iPhone, Android, and PC, plus how to reverse audio (2026).
Need more than 1 join a day?
Sign up free to lift the daily limit — and turn any video or podcast into an AI summary, transcript, or mind map in seconds.