Carina | Updated on Feb 20, 2025
WebM is an open-source file format that can store audio and video content. It is designed for online streaming in modern web environments and is supported by all the major web browsers. Moreover, many devices and video processing tools also support WebM format.
WebM files support VP8, VP9, and AV1 video encoders and Ogg Vorbis, Opus for audio. These codes provide good compression with minimal quality loss.
It is intended as a royalty-free alternative to other formats for use in HTML video and audio.
WonderFox Free HD Video Converter Factory is a free versatile tool designed for video and audio processing.
It supports all WebM files and allows you to crop WebM files with a free or fixed aspect ratio. This free WebM cropper can even export your video in high-quality without a watermark.
You can benefit more from this powerful video processing tool:
⚡ User-friendly interface and intuitive workflow
⚡ Wide format support for both input and output
⚡ More editing features to trim, rotate, merge, add audio, etc.
⚡ Import multiple files to process and export at one time
DownloadDownload it now and follow the steps below to crop your WebM files.
Open the program on your PC and choose Converter on the home interface. Then press +Add Files to import your WebM videos. You can also drag and drop them into the program straightly.
💡 Based on the number and size of the files, it may take a while to load all the videos.
Hit the Crop icon to open the Crop window. Under the mode of Free Aspect Ratio, you can drag the four borders to select the cropping area. You can also choose a Fixed Aspect Ratio and then fine-tune it. Click OK to go back to the main interface.
Click the right-side format image to expand the output format library. You can go to the Web category to select the original WebM format or choose other output options like MP4, MOV, etc.
If needed, you can open the Parameter setting window to modify the output video encoder, resolution, bitrate, etc.
However, note that if you try to change the video resolution, it only supports a maximum 720p output resolution. If you want a higher output resolution, please upgrade Free HD Video Converter Factory to HD Video Converter Factory Pro.
Once set to the desired output options, click the ▼ button to set a destination folder and press Run to start outputting the cropped WebM videos.
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If you only have several small-sized WebM files to crop, you can try an online video editor, like 123APPS.
It is a simple online video editor that offers basic editing functions like crop, cut, rotate, etc. Not only WebM, but it also supports MP4, AVI, MKV, etc.
However, note that this online tool only process 5 files per day and each file cannot exceed 500 MB under the free plan. There are amny pop-up ads during the usage.
The steps are quite easy, and you can read the following simple guide to crop your WebM videos online.
Step 1. Open 123APPS online video cropper on your browser with https://online-video-cutter.com/crop-video/webm
Step 2. Click Open file to upload WebM videos into the video cropper. Then press the blue button to upload video and wait for a while.
Step 3. You can directly choose a fixed aspect ratio under the timeline to crop your video and then move the rectangle box to the desired place on the preview window.
You can also hold and drag the white dot on the box to freely adjust the crop region.
Step 4. Click the settings icon at the bottom-right corner to select an output format. 123APPS only supports MP4, MKV, and MOV formats.
Step 5. Click Save to start the exporting process. Once finished, click the Save button again to save the video to your device.
That’s all about how to crop WebM files.
Though online video editors like 123APPS offer a more direct way to crop video. It may not be suitable to process large files, especially when your internet connection is weak. Otherwise, it will take a long time to upload and process the file, or even crash.
However, this is nothing for a desktop video cropper. You don’t need to consider the internet connection and the file size with Free HD Video Converter Factory. It also offers other practical features for various media processing needs. You can free download it here to have a try!
🔍 To crop WebM files without a watermark, you can try the two video croppers we share in this post: WonderFox Free HD Video Converter Factory and 123APPS. They can crop your WebM files without putting a watermark for free.
🔍 No. It's impossible to crop any video without re-encoding. When cropping a video, the pixel data is changed and needs to be re-encoded. If you want to crop your WebM with minimal quality loss, you can use an efficient codec like H264 or HEVC and don't upscale the video to its original resolution.
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