Merge MP3 files
Merge MP3 files into one MP3, in the order you choose, back to back or with a crossfade. Free with no limit, no account, nothing uploaded.
Drop the files to join
MP3 · WAV · M4A · MP4 · MOV · WEBM — up to 1 hour in all. Nothing is uploaded.
How it works
- Drop all the MP3s onto the box above at once, or one by one with Add files.
- They're listed in name order, so 01, 02 and 03 come out right. Move any of them with the arrows.
- Join them back to back, with a second of silence, or with a 2-second crossfade, and play it to check.
- Download one MP3, free with no limit.
Merging audiobook chapters and podcast parts
Name order is the order most audiobooks, lectures and recorder files are numbered in, so dropping a folder's worth of MP3s usually puts them right at once: "Chapter 2" comes before "Chapter 10", which a plain sort gets wrong. Check the list, move what's out of place, and join them back to back.
Joined back to back, each file starts where the one before ends, crossfaded over 10 milliseconds so the join doesn't click.
MP3 quality
Tools that join MP3s without decoding them glue the files' frames together. That plays properly only when every file has the same sample rate and channels, and it leaves a short gap where each encoder padded its file's ends. AudioRinse decodes every file, joins the sound, and encodes one new MP3 at 192 kbps, which is more than most MP3s are made at. To lose nothing at all, download a WAV.
Questions
Are my files uploaded anywhere?
No. The MP3s are merged inside your browser, on your own device, and never leave it.
Is it free?
Yes, with no limit, no account and no watermark.
Can I merge an MP3 with a WAV or an M4A?
Yes. Each file is decoded, so any mix of MP3, M4A, WAV, FLAC and the sound of videos works, and the result is one MP3 (or an M4A or WAV if you pick one).
How many MP3s can I merge?
As many as you like, up to 1 hour in all.
Does it keep the title and cover art?
No: the merged MP3 has the sound only. Most music apps let you add a title and cover to it.
Other tools
- Audio cutterKeep the part you need, or cut one out.
- MP3 cutterAn MP3 cut to the part you need, saved as MP3.
- Audio trimmerThe start and end trimmed off a recording.
- Ringtone makerAny song as an iPhone or Android ringtone.
- Audio joinerSeveral recordings joined into one file.
- Remove background noise from audioFans, traffic, hiss and room noise out of a voice recording.
- Remove background noise from videoClean a video's soundtrack. The picture is kept untouched.
- Voice isolatorKeep only the voice; everything else goes.
- Audio enhancerNoise removal + voice EQ + loudness, in one step.
- Voice enhancerClearer, fuller, evenly loud voice.
- Remove reverb from audioLess room, more voice: for recordings made in echoey rooms.
- Remove echo from audioFix the hollow, echoey sound of a big or empty room.
- Remove buzz and hum from audioElectrical buzz and hum out; the voice or music around it untouched.
- Remove silence from audioDead air out: every long pause cut to a set length.
- De-esserHarsh S sounds softened; the voice keeps its brightness.
- Fix clipped audioFlattened, crackly peaks from recording too loud, rebuilt.
- Mouth click removerLip smacks and tongue clicks out of a voice-over.
- Normalize audioPodcast, YouTube or broadcast loudness, true-peak safe.
- Volume boosterQuiet audio or video made louder, without clipping.
- MP3 volume boosterA quiet MP3 made louder, saved as an MP3 again.
- Increase video volumeA quiet video made louder; the picture stays as it is.
- Online voice recorderRecord from your microphone; download MP3 or WAV, or clean it up.
- Remove vocals from a songThe vocals out of a song: a clean instrumental, and the acapella too.
- Vocal isolatorThe singing alone from any song, separated on your computer.
- Split a song into stemsVocals, drums, bass and the rest, each on its own track.
- Remove music from a videoBackground music out of a video, or turned down; the voices stay.
- Make a karaoke version of a songAny song as a karaoke track: the vocals out, the band left.
- Extract the vocals from a songThe vocals alone from any song: an acapella for remixes and covers.
- Make an instrumental of a songThe instrumental version of any song, the vocals taken out.
- Remove the drums from a songThe drums out of a song, for drummers to play along.
- Find the BPM of a songThe tempo of any song, with its key and Camelot code.
- Find the key of a songThe key of any song, with its Camelot code and tuning.
- BPM and key finderTempo, key and Camelot for a whole folder of songs, as a CSV.
- Tap tempoTap along on each beat and read the BPM.
- Camelot wheelWhich keys mix: pick one, or drop your songs onto the wheel.
- Pitch changerRaise or lower the pitch in semitones; the speed stays the same.
- Change the key of a songFinds the song's key, then moves it to the key you pick.
- Change the speed of audioSlow down or speed up, from 0.5× to 2×, at the same pitch.
- 432 Hz converterRetunes a song to A = 432 Hz, at the same speed.
- Voice changerDeeper, higher, robot or chipmunk, on any recording.
- Audio to sheet musicA piano recording written out as a two-hand score.
- MP3 to sheet musicAn MP3 of piano music, written out as a printable score.
- Piano transcriptionPiano playing written out, both hands, in seconds.
- Video to MP3The sound of any video as an MP3. Free, no limit.
- MP4 to MP3Any MP4's sound as an MP3, in seconds.
- Video to audioAny video to MP3, M4A or WAV. Free, no limit.
- MOV to MP3iPhone and QuickTime videos to MP3.
- MP4 to WAVUncompressed WAV from any MP4, for editing.
- WebM to MP3WebM video or audio to MP3.
- MKV to MP3OBS recordings and MKV films to MP3.
- Extract audio from videoA video's sound track as a file, in its original quality.
- Remove audio from videoThe same video with its sound track taken out; the picture untouched.
- Mute a videoSilence a video for good: the sound track out, the picture as it was.
- M4A to MP3Voice memos and iTunes songs as MP3.
- WAV to MP3WAV to MP3 at a fraction of the size.
- MP3 to WAVMP3 to uncompressed WAV, for editing.
- M4A to WAVVoice memos and M4A to uncompressed WAV.
- OGG to MP3Ogg Vorbis, Opus and voice messages to MP3.
- FLAC to MP3Lossless FLAC to MP3, tags and cover kept.
- Transcribe audio to textAny recording to text, transcribed on your computer.
- Convert audio to textSpeech in any audio file, converted to text on your device.
- Convert MP3 to textAn MP3's speech as text, with timestamps.
- Transcribe a video to textWhat's said in a video, as a timestamped transcript.
- Convert video to textSpeech in any video, converted to text on your device.
- Add subtitles to a videoAuto subtitles, edited in place, burned in or as SRT.
- Auto captions for your videoCaptions for reels and videos, styled and burned in.
- Generate subtitles automaticallyTimed SRT and VTT subtitles from any video.
- Song to lyricsA song's words, transcribed from its vocals.
- Interview transcriptionSpeaker-labelled transcripts, made on your computer.
- Transcription for qualitative researchInterviews and focus groups, ready for NVivo and MAXQDA.