As an audiovisual media format, WebM can produce open and high-quality video output. A WebM file contains both video compressed with VP8 or VP9 video codecs and audio compressed with the Opus or Vorbis audio codecs, which is commonly used in many online videos and the HTML 5 websites. Sometimes, when you capture several WebM video clips from website, you might have a need to merge them together into one for ease of management or convenience of viewing. How to combine WebM files into one? Get lossless solutions from the post.

Part 1: Lossless Video Joiner to Combine WebM Files

Any WebM joiner comes to your mind when you feel like combining plentiful WebM files into one whole on desktop? If you haven't thought of it yet, there is no harm in giving Joyoshare Video Joiner a try. Being a remarkable video joiner, it is not going to disappoint. With wide compatibility, this video merging software can serve all kinds of media files encompassing WebM, DivX, DVD, MKV, MP4, AVI,4K Video, FLV, and many more. Besides, though referred to as a video merger, it also puts you the ability to cut and edit videos in your way.

Merging media files with Joyoshare Video Joiner, you will have the enjoyment of 60X speed of merging and the fun of video customization, because it comes with two joining modes. Working with the high-speed mode, you are able to merge WebM files with lossless quality. When choosing the encoding mode, you get access to personalize videos with dozens of special effects. It's fair to say that this is a rare merging tool whether for professionals or amateurs.

Step 1: Quickly download and install Joyoshare Video Joiner on Windows or Mac. After that, you should open it and click "Open File" to choose your WebM files. Alternatively, you can drag and drop files from desktop to the program;

Step 2: In this step, you need to tap on "Format" to choose a mode to merge WebM files. It should be noted that the high-speed mode is for those who want to merge files without quality loss while the encoding mode supports polishing video files and allows you to customize file format by touching a gear icon;

Step 3: When clicking "OK" button to return to the main interface, you can preview these videos. If you find something needless, you are able to slide the yellow timeline to remove it. In addition, rename and rearrange video files can also be done in this interface;

Step 4: This is not a necessary step. Users choosing high-speed mode can directly skip to the next step. For users selecting encoding mode, they can rotate videos, add special effects and subtitles, design a unique watermark, etc. to polish their WebM videos;

Step 5: Once got ready, just hit on "Convert" to start merging WebM video files. The process will be over soon. Then you could find the combined WebM video in your local folder;

Part 2: More Video Joiners to Combine WebM Files

To provide more options for combining WebM files on desktop, aside from Joyoshare Video Joiner, the following adds 3 commendable video joiners. You can pick the one that suits you best after reading.

Freemake Video Converter
Freemake Video Converter is an all-in-one and easy-to-use program used to convert and combine video/audio files. It supports more than 500 sorts of media formats including popular MP4, AVI, MKV, MP3, etc and relatively rare QT, Xvid, Fraps, etc. Beyond that, it is equipped to transform video clips to play on any device like iPhone/iPad, Sony PSP, Xbox, tablets, consoles, smartwatch, and more. With it, users can also edit videos, burn DVDs, and combine photos as a slideshow.

MKVToolNix
As a cross-platform set of tools, MKVToolNix concentrates on creating, splitting, altering, and joining MKV files in Windows, macOS, Linux, and BSD. It gives support to encapsulate videos, audios, subtitles in various formats into MKV format. Also, its recent version makes it compatible with WebM file format, which can nicely help you combine WebM files. Regarded as the most fully-featured Matroska synthesizer at present, MKVToolNix is worth attempting.

Faasoft Video Converter
Wisely making use of Faasoft Video Converter is another nice way to combine WebM files without damaging quality. It fully supports a wide number of video/audio file formats covering HD, WMV, HDV, WebM, VP8, AAC, OGG, etc. and can convert them to compatible devices like iPhone, iPad, Apple TV, Playbook, and so forth. More, it brings you 30X speed conversion speed and also allows you to edit videos, adjust bitrate, apply effects, etc.

For more details:
https://www.joyoshare.com/join-video/combine-webm-files.html