How to Merge Multiple MP4 Video Files Online without Quality Loss

October 28, 2020Ashley Mae

Suppose you need to merge several MP4 files but it is not convenient to install software on your computer. How can you achieve the task? The answer is web-based apps. In fact, there are a lot of online apps that can help you to do various jobs including merge MP4 files online. This guide will identify and share the best MP4 merger online. All you need to do is to follow the guide and produce a complete story.

Merge MP4 Files Online for Free

Part 1: How to Merge MP4 Files Online for Free

It is well-known that most web apps have some limitations, like file size, watermark, and more. If you want to get rid of such limits, Aiseesoft Video Merger Online is the best choice.

How to Merge MP4 Files Online for Free

Step 1:
Whenever you need to combine MP4 files, open a web browser, copy and paste into the address bar, and hit Enter key on your keyboard.
Step 2:
Click the Add Files to Merge button in the home page and follow the onscreen instructions to download the launcher.
Add Files
Step 3:
When prompted, find a desired MP4 file and upload it. Then the launcher will appear. Now, you can click the Plus icon to insert other MP4 files before and after current video. Next, click the drop-down list of Resolution and select a proper output quality. By default, it will be optimized based on the original MP4 files. Then set the output Format.
Set Parameters
Step 4:
After setting, click the Merge Now button. Select a specific folder to save the output and begin combining MP4 files online.
Merge Video

Note: When MP4 merging is done, the output file will be saved to your hard drive immediately.

Part 2: Best Way to Merge MP4 Files on Desktop

Sometimes, you may want to get more advanced functionalities, such as crop, trim and more. You cannot get these features in a single video merger online. Alternatively, Aiseesoft Video Converter Ultimate can meet your need.

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Aiseesoft Video Converter Ultimate – Best Alternative to Online MP4 Mergers

  • Combine MP4 files together without internet connection.
  • Support a wide range of video editing features.
  • Convert combined video for playing on mobile devices.
  • Preview video files with the built-in media player.
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How to Combine MP4 Files without Quality Loss

Step 1:
Load MP4 files
When online MP4 merger apps cannot meet your need, install the best alternative to your PC. There is a specific version for Mac. Then launch it and click the Add Files menu at upper left corner to import the MP4 files that you want to merge. Another way to load MP4 files is to drag and drop them into the media library panel.
Add Files
Step 2:
Merge MP4 files on desktop
Preview the video files and adjust the order in the media library panel. The icons below the title let you edit and trim the video file easily. To merge MP4 files, tick the checkbox of Merge into one file at the bottom right side.
Step 3:
Export joined video
After video editing, go to the bottom of the interface. Click the Folder icon and set a specific folder. If you want to change the output format, set it in the Convert All to option at upper right side. Finally, click on the Convert All button at bottom right side to begin combining MP4 files immediately. According to our research, it only takes a few seconds to process dozens of MP4 files.
Convert All

Apart from merging MP4 files, it also allows you to merge AVI, MKV, VOB, MOV, etc., and combine audio files with ease.

Part 3: FAQs about Merging MP4 Files Online

Are online MP4 mergers really free?

Not all online apps are really free of charge. Some of them will add watermark to output and you have to pay for removing watermark. Moreover, the free version usually has some restrictions.

Can I combine MP4 files in VLC?

VLC does not have the capacity to combine video files, but you can utilize the video converting feature to merge multiple MP4 files.

How do I merge MP4 files in Windows Media Player?

Windows Media Player is the preinstalled media player for PCs, but it cannot edit video files or join MP4 files.


This guide has told you how to merge MP4 files online for free. As a web app, Aiseesoft Video Merger Online is as powerful as some desktop software. It is able to combine MP4 files without installing. Though free to use, it won't add watermark to output or have file size limit. If you do not have a good internet connection, try Aiseesoft Video Converter Ultimate instead. More questions? Please write them down in the comment area below this post.

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