How to Join Two/Three/More FLV Files into One together (Free & Paid)

January 08, 2021Ashley Mae

FLV (Flash Video) is a container format for transmitting video or audio over the internet. You can get high-quality FLV video files in small sizes. That's why so many videos and movies are delivered in the FLV format. If you have many FLV video clips, you can combine them into a new file. If you are looking for the best way to join FLV files, you just come to the right place.

This article introduces professional and free ways to combine FLV video clips. You can get 30x faster speed and advanced editing filters to merge several large FLV files into one. Or you can merge FLV files online and offline for free. Just read and follow.

Join FLV Files

Part 1: Join FLV Files with 30X Speed

By using Aiseesoft Video Converter Ultimate, you can join, edit, convert, and enhance FLV files in one stop. With the latest hardware accelerating technology, you can combine FLV files into one in the shortest time. Moreover, you can apply basic and professional effects to your merged FLV file. For moviemakers, you can also add and adjust subtitles and audio tracks within the program. VCU is not only a powerful FLV video joiner but also an FLV video editor and converter for users at all levels.

Video Converter Ultimate


Aiseesoft Video Converter Ultimate

  • Join FLV files into MP4, MOV, MKV, and other 1000+ encoding formats.
  • Deliver the best image and audio quality after FLV video joining.
  • 30x faster speed with the world's leading Blu-Hyper technology.
  • Add filters, basic effects, subtitles, audio tracks, 3D effects, specific themes, and other advanced support to all your FLV videos.
Free DownloadFor Windows

Secure100% Secure. No Ads.

Free DownloadFor macOS

Secure100% Secure. No Ads.

Step 1:
Free download, install, and launch Aiseesoft Video Converter Ultimate. Click Add Files to import your FLV video clips.
Add Files
Step 2:
Use the built-in preview window to have a check. You can adjust the order with the right-side up and down arrows in the media library area. To merge FLV files, click Merge into one on the bottom right corner.
Step 3:
Click the Edit icon to explore more advanced features. If you want to merge FLV files to MP4 and other compatible formats, you can unfold the Format drop-down list. Change the destination folder from the Save to list. At last, click Convert All to join multiple FLV files into one together.

Part 2: Top 3 Free Tools to Join FLV Files

Here're FLV joiner freeware for not only Windows and Mac users, but also iPhone, iPad, iPod Pro, and Android users. If you don't require video editing tools and effects, you can join FLV video files for free with the following tools.

Top 1: Aiseesoft Video Merger Online

Aiseesoft Video Merger Online is the best online video merger. You can join FLV files without file size or number limit. Moreover, you can change the output video resolution and format after combining FLV files.


  • Join several FLV clips into a bigger one online for free.
  • 100% safe and clean for all browsers.
  • Adjust output parameters combine FLV files together in high quality.


  • Contain a watermark in the output FLV video file.
  • The online FLV video merger doesn't compatible with iOS and Android browsers.
Set Parameters

Top 2: Aiseesoft Video Editor

Aiseesoft Video Editor is a desktop FLV video joiner and editor for both Windows and Mac users. You can join, rotate, flip, crop, watermark, and convert FLV videos for free. The intuitive interface is friendly to all users.


  • Join FLV clips in custom order by dragging and dropping.
  • Clip unwanted FLV video and audio parts from your FLV source files.
  • Edit video effects and convert video formats.


  • No advanced clipping and editing filters.
  • Support mainstream video and audio formats only.
Video Editor

Top 3: VLC Media Player

VLC Media Player is a free and open-source video player, converter, and editor for desktop and mobile users. You can combine FLV files using VLC for free on Windows, Mac, Linux, iPhone, and Android.


  • Join FLV files using VLC Media Player on multiplatform.
  • Convert FLV videos to WMV, M4V, and other popular video formats.
  • Change video output settings and delete the selected video parts.


  • The VLC interface is outdated. You need to spend some time to get familiar with VLC.
  • Need to install codecs to get video playback of some formats.
VLC Media Player

Part 3: FAQs of Joining FLV Video Files

How to merge FLV files with VLC?

Open VLC. Choose Open Multiple Files from the Media drop-down list. In the File section, choose Add to upload FLV clips. Unfold the bottom Play list, choose Convert from its list. Set the output format and folder. At last, click Start to use VLC to combine two FLV videos into one.

How to convert FLV to MP4?

You can use Aiseesoft Free Online Video Converter to convert FLV to MP4 and other formats online for free. Or you can run Aiseesoft Video Merger Online to join and convert FLV files for free as well.

Can you use FFmpeg to merge FLV files?

Yes. FFmpeg can be your FLV video joiner freeware. But joining FLV files with FFmpeg is not a good idea for beginners.

In a word, you can use the above online and offline video mergers to join FLV files on your computer and phone. There is no technical background required. No matter how many FLV clips you have, you can quickly create a complete FLV video with ease.

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Video Converter Ultimate is excellent video converter, editor and enhancer to convert, enhance and edit videos and music in 1000 formats and more.

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