[2019 Review] 5 Best Online MP3 Mergers

Have several different MP3 audio files and want to join them together? Well, you can get an online MP3 joiner to merge MP3 online as you like. It's easy to use, no software installation and most importantly, most of online tools are free of charge. However, it's also difficult to find a satisfied one. Thus, I have tested some and list out 5 best of them for your reference.

1. Audio Joiner

Audio Joiner is a free MP3 merger online, which is incredibly simple to use for novices. With this forthright assistant, you can get unlimited audio tracks merged with ease. Not just confined to MP3, you can also import more than 300 types of audio formats, like M4A, OGG, WAV, etc.
When you get down to mix your MP3 files, you can get an access to adjust the intervals in your own way. Smartly make use of the fade-in, fade-out and crossfade features so that you can produce a smooth and natural audio composition. Crucially, you don't have to worry about the privacy issue as all your uploaded date will be deleted automatically a few hours later after you finish your operation.
Pros:
Support over 300 audio formats
Allow you join unlimited audio files at a time
Free to use without installing anything
With crossfade design to make different MP3 files joined seamlessly
Cons:
Network status affects upload speed
audio joiner

2. Aconvert

Compared with Audio Joiner, Aconvert offers one more option to add MP3 files, which enables you to either select designated MP3 file from local folder or paste online audio URL directly.
There are lots of audio formats can be acceptable by this compact tool, such as WAV, OGG, AAC, WMA, AU, FLAC, MKA, M4A, AIFF and RA and so on. Even though effective as it is, you can only be empowered to join audio track with the same format and bit rate.
Pros:
With clean and tidy user interface
The maximum audio file size is 200M
Input audio can be added from local folder or with online URL
Cons:
Only join audio track with the same format and bit rate
aconvert merge

3. Apowersoft Free Online Audio Editor

Providing perfect 2-in-one platform, Apowersoft Free Online Audio Editor can well cater to any user's need. By means of it, you can get chance to carry out a series of splendid works. In details, it facilitates you to mix, append and overwrite audio files with diverse effects applied.
Besides, this tool can as well support various formats, including MP3, AAC, FLAC, OGG, WAV and M4A and more. You can even preview the effects in real-time to see whether it is in accord with your expectation. Certainly, this online MP3 merger and cutter can come to rescue to manage your own music library. That is to say, there is no problem for you to edit the ID3 tag info for your completed MP3 file.
Pros:
Support a wide range of audio formats
Rework audio track by applying rich effects
Allow you to edit ID tag info
Merge MP3 online rapidly with no quality loss
Cons:
It's possible to leak privacy info
apowersoft free online audio editor

4. Free Online Editor

Free Online Editor is specialized in merging and joining several MP3 files into a new one. It makes ringtone and music creation easier. Just head to your browser to visit this online site rather than cost time to install software on your PC.
Furthermore, you can enjoy yourself in joining numerous MP3 files freely considering this free MP3 merge online tool locks the uploaded file quantity limitation thoughtfully. To keep it well for future listening, you can also download the one you like locally with a single click. One terrible thing is that you can do nothing when you would like to leave out needless parts before your merging process.
Pros:
Simple to operate with no cost
No restriction on the number of imported MP3 files
With strictly privacy protection by deleting data from server
Cons:
No option to cut unwanted parts
It's time-consuming to upload files
free audio editor

5. Filesmerge

Filesmerge is another lightweight online MP3 merger, which is capable of merging more than 3 audio tracks together. Once you set about taking advantage of this smart tool, you can choose a local file by straightly dragging and dropping it to the main position. Or you can enter a specific URL to upload MP3 audio files.
However, you should pay attention to the file size limit of each audio track, not exceeding 50M. With more available options, Filesmerge has capability to let you set output file in customized way. You can change quality, encoder, sample rate and channel for your destination audio as you please.
Pros:
Supporting uploading files from local folder or online sites
Help you delete uploaded audio tracks to avoid info leakage
Entitle you to set quality, sample rate, channel, etc.
Cons:
With limited format: MP3
Each file cannot exceed 50M

Source: https://www.joyoshare.com/reviews/online-mp3-joiner.html

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