How to Join MP3 Files with Free MP3 Joiner

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How to Join MP3 Files with Free MP3 Joiner

4 July 2019 John Weaver Senior Program Developer

Last update by James Smith at 8 November 2026

Summary
MPEG Audio Layer 3, also called MP3 for short, is one of the common coding formats for digital audio. If you want to join several MP3 files into one, you need to utilize the software or program. How to join MP3 files with free MP3 joiners? This essay will tell you!

Content

Part 1: Use Command Lines to Join

Part 2: Use Renee Audio Tools to Join (Free)

Part 3: Use MP3 Joiner to Join (Free Trial)

Part 4: Use Aconvert to Join (Online)

Of course, many people prefer to search some free methods to join the MP3 files although many paid applications are available. How to join MP3 files with free MP3 joiners? Here are our recommendations.

Part 1: Use Command Lines to Join

In Windows OS, we can use the built-in command program to join the MP3 files. The copy order can facilitate us to join two or more audio / video files into one file. Yet, you should understand how to order the command lines. If you don’t, please refer to the method 2.

How to join MP3 files through command lines:

① Press [Win + R] and then search [cmd] to open Command Prompt.

② Type and press Enter to run [copy /b “f:Renee1.mp3” + “f:Renee2.mp3” “e:Renee.mp3”].

use command prompt to copy and merge mp3

③ Then, the MP3 files will be joined into one.

merge audio files through command prompet

TipsNote of the command:

1. “copy/b” should follow the saving path, the file name and the format of the target audio file.

2. [+] is used to join the audio files.

3. Write the output path, the file name and the format of the merged file.

Part 2: Use Renee Audio Tools to Join (Free)

Renee Audio Tools is the free software for audio editing, collecting converter, CD burner, splitter, recorder, cutter, joiner and the other tools. Through this software, you can join MP3 files, cut, convert formats and even edit ID3 tags.

Professional Audio Editor – Renee Audio Tools

CutterArbitrarily cut and clip audios in MP3, ACC, FLAC and APE formats. Many effects, such as fade in/out, speed adjustment, music mixing and volume adjustment, are available.

ConverterConvert music files between all audio formats, including MP3, M4A, ACC, OGG, AAC, FLAC and the others. It can also convert the video format into MP3.

RecorderRecord computer sounds from streaming media and microphone at the same time and output into multiple audio formats.

JoinerMerge music files into one regardless the original file formats. The output format and quality can be set, too.

CD BurnerBurn multiple music files into CD, DVD and also make APE or BIN image file.

Compatible with: Windows 11 / 10 / 8.1 / 8 / 7 / Vista / XP (32bit/64bit)

CutterArbitrarily cut and clip audios in diffrent formats. Many effects, such as fade in/out, speed adjustment, music mixing, are available.

ConverterConvert music files between all audio formats, including MP3, M4A, ACC, OGG, AAC, FLAC and the others. It can also convert the video format into MP3.

RecorderRecord computer sounds from streaming media and microphone at the same time and output into multiple audio formats.

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① Download and install Renee Audio Tools.

Download Renee Undeleter Windows Version

② Launch the software and go to [Joiner].

select the function joiner in renee audio tools

③ Click [Add Files] to select the target MP3 files.

④ Check [Merge all files into one].

⑤ Select the output format, output quality and output folder. Finally, click [Start] to save the file.

join some audio together in renee audio joiner

Part 3: Use MP3 Joiner to Join (Free Trial)

MP3 Joiner is a simple MP3 joiner. You can use it to simply join some MP3 files. Yet, it is a paid application supporting free trail. If you want to use it all the time, you should pay for the full version.

① Download and install MP3 Joiner. Link: http://www.mp3joiner.org/downloads/mp3joinerinstaller.exe

② Drag the target MP3 files to the software.

③ Select the output folder, format, quality, then click [Join] to join the MP3 files.

④ As it is finished, click [Close] to close the program.

the audio file is processing in mp3 joiner

Part 4: Use Aconvert to Join (Online)

Aconvert is an online audio editor. You can select the online or local MP3 files to covert formats, cut and join files.

① Go to the website. Link: https://www.aconvert.com/audio/merge/

② Click [Choose File] button to select a file on your computer. You can also click the dropdown button to choose online file from URL, Google Drive or Dropbox.

③ Click [Submit] button to start processing. The new audio file will be appended to the latest audio file.

④ Click the download button next to the latest file.

click to download the merged file in aconvert

⑤ Click the link on the file information page.

link to the file url in file information page in aconvert

⑥ Right-click at the audio file and select [Save audio as] to save the joined MP3 file.

TipsThe audio files you added to merge must have the same format and bit rate. For example, you submit audio files A, B and C one by one, the latest output audio file will be file A+B+C combined together.