2025 10 Best Free WebM to MP4 Video Converters for Windows and Mac

Part 1: What is the WebM format? Is MP4 better than WebM?

WebM is an open-source, royalty-free video file format designed primarily to meet the needs of online video playback, particularly within the HTML5 standard. WebM video streams typically use the VP8 or VP9 encoders (the AV1 encoder is now also supported), while audio streams typically use the Opus or Vorbis encoders. Is MP4 better than WebM? There's no definitive "yes" or "no" answer to this question, as it depends on the specific use case and scenario. We can compare them along several dimensions:

	WebM	MP4
Developer	Google	International Organization for Standardization (ISO)
Encoding	VP8、VP9、Opus	H.264, AAC, MP3, and others
Size	VP9/AV1 encoding is smaller in size	Depends on encoding and compression settings
Capability	Supports Chrome, Firefox, Edge, Opera, and Safari	100% support in all modern browsers
Hardware	Only newer devices support VP9/AV1 decoding	Almost all devices support H.264/265 decoding
Application	Mainly used in the network	Supports network, film, photography, editing, etc.

Generally speaking, if you want to save a video and ensure it plays smoothly on any computer, phone, TV, game console, or player, MP4 is the most reliable option.

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Part 2: 2025 5 Best WebM to MP4 Converters on Windows and Mac

Here is a brief comparison of the 5 WebM to MP4 Converters on Windows and Mac:

Program	Platform	Free or Not	Ease of use	Limitations	Batch Converting	Advanced Settings
Any Video Converter	Download Win Download Mac	Free	★★★★★	No	Yes	Yes
VLC Media Player	Windows/Mac/Linux	Free	★★★★✰	No	Yes	Yes
Movavi Video Converter	Windows/Mac	7-Day Free Trial	★★★★✰	Need to purchase after the free trial	Yes	Yes
Handbrake	Windows/Mac/Linux	Free	★★★✰✰	Require a learning curve	Need to queue	Yes
Winxvideo AI	Windows/Mac	Free Trial	★★★★✰	No	Yes	Yes

1. Any Video Converter

Any Video Converter is a comprehensive free tool designed for converting videos on Windows and Mac among various formats, including MP4, MP3, WebM, AVI, MOV, and more. It operates efficiently with GPU acceleration and a user-friendly interface. For converting WebM to MP4 in this free format converter, it can reduce file size to the greatest extent while maintaining the original WebM video quality.

If you're looking for more advanced settings, Any Video Converter offers detailed parameter adjustments and batch conversions, making the conversion process flexible and controllable. This WebM to MP4 converter lets you manually adjust the video resolution (4K to 1080P), video/audio bitrate, and video/audio encoder (H.264, H.265, AAC, etc.) to ensure optimal playback on your specific device or upload and share MP4 videos on platforms like Instagram and Twitter that don't support WebM videos.

Apart from WebM to MP4 conversion, this tool offers additional features such as downloading online videos, compressing videos, enhancing video quality, video editing, etc. This means that after the WebM to MP4 conversion is complete, you can use the built-in tools to perform simple editing such as cropping videos, trimming video clips, and merging multiple videos, and complete all operations in one stop.

Steps to Convert WebM to MP4 with Any Video Converter

Step 1: Install Any Video Converter

Download and install it on your PC at first. Then run this WebM to MP4 Converter.

Step 2: Add WebM Videos

Click the "Format Convert" tool and upload your WebM videos. You can upload multiple WebM videos and convert them to MP4 format at once.

Step 3: Set Output Format to MP4

Go to the Output Profile, click the drop-down menu of video format, then select "MP4 Video(*.mp4)".

In "Video Options" and "Audio Options," you can customize the parameters.

Step 4: Start Converting WebM to MP4

Click the "Convert Now" button to convert WebM to MP4.

2. VLC Media Player

VLC Media Player is not only a popular media player but also a good free WebM to MP4 converter. It facilitates popular audio and video conversions, supporting formats like WebM, MP4, OGG, TS, ASF, and MP3. In addition to basic video format conversion, VLC can adjust various settings, including frame rate, bitrate, resolution, and codec, making it a versatile tool for video customization.

When converting WebM to MP4 videos, VLC primarily relies on the CPU rather than the GPU for software encoding. This results in extremely slow conversions, especially when batch converting tasks, which may cause your computer to become stuck during the conversion.

Steps to Convert WebM to MP4 with VLC Media Player

Step 1: Open the VLC Media Player

Click the media menu, then select "Convert/Save".

Step 2: Upload WebM Video to VLC

In the "Media" window, click the Add button and select the WebM video files you want to convert. Then click the "Convert/Save" button.

Step 3: Select MP4 Format

In the "Convert" window, select MP4 as the output format. Finally, click the Start button to begin the conversion process.

3. Movavi Video Converter

Movavi Video Converter is a versatile tool that converts video and audio files across various formats, including WebM to MP4. It features an easy-to-use interface with drag-and-drop functionality and presets for common conversion tasks. Notably, Movavi Video Converter is a paid program, offering you a 7-day free trial.

The free version permits the conversion of up to five files simultaneously but lacks some advanced features, such as the ability to convert videos for specific devices. After the seven-day free trial, you will need to purchase an activation key ($19.95/month) to enter the program and start conversion tasks.

Steps to Convert WebM to MP4 with Movavi Video Converter

Step 1: Download and Launch the Movavi Video Converter

New users can use the 7-day free trial. Then upload WebM videos to the program.

Step 2: Click on the "Popular" or "Video" to Select "MP4"

You can also customize other video settings, such as resolution, bitrate, and frame rate, if necessary.

Step 3: Choose File Path and Save MP4 Files

Click on the "Save To" button and select the location where you want to save the converted MP4 video. Create a new folder if you want to organize your videos. Finally, click on the "Convert" button to start the WebM to MP4 conversion.

4. HandBrake

HandBrake is open-source video conversion software. Its key feature is to convert videos from one format to another while offering rich and sophisticated settings (summary, dimensions, filters, subtitles, etc.). This WebM to MP4 converter is completely free and open-source, meaning there are no hidden fees, free trials, bundled software, or malicious ads, making it very clean and secure for you.

However, for complete beginners, HandBrake is filled with technical jargon, and it takes some time to learn and master its advanced features. Furthermore, HandBrake is primarily focused on transcoding and compression, not video editing. It does not provide professional video editing tools like Any Video Converter does.

Steps to Convert WebM to MP4 with HandBrake

Step 1: Launch HandBrake

Click "Open Source" and open your one WebM file.

Step 2: Select MP4 Format

Select "MP4" as the output format in the "Format" drop-down menu. In the "Video" section, you can select a video encoder and adjust bitrate and frame rate.

Note: It does not support batch settings of WebM videos, but you can set WebM videos to MP4 format one by one and add them to the queue.

Step 3: Start Transcoding WebM to MP4

After completing all settings, click the "Start Encode" button above the program, and HandBrake will begin the conversion process.

5. Winxvideo AI

WinXvideo AI is a video processing tool with AI-enhanced features. It not only supports video conversion but also integrates video editing, screen recording, video downloading, and other functions. Like Any Video Converter, this WebM to MP4 converter supports full GPU acceleration, with official data showing conversion speeds up to 47x faster than traditional CPU processing (Any Video Converter is up to 130x faster). Besides supporting common formats like MP4, MOV, MKV, and AVI, it also supports WebM conversion.

If the original WebM file is in high quality, converting it to MP4 using WinXvideo AI may result in quality loss, especially if the conversion settings are inappropriate (e.g., the bitrate is too low).

Steps to Convert WebM to MP4 with Winxvideo AI

Step 1: Open Winxvideo AI and Add WebM Videos

On the main interface, select "Video Converter" and upload your WebM videos.

Step 2: Choose MP4 as Target Format

Select MP4 format in the "Target Format" at the bottom. You can also click "Option" to adjust the video parameters.

Step 3: Convert WebM to MP4

Click the "Run" button to start converting WebM to MP4. Please note that the free version can only convert videos up to five minutes long.

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Part 3: 2025 5 Best Free Online WebM to MP4 Converters

If you don't want to download and install any software, this section lists 5 online WebM to MP4 converters. Here is a brief comparison of the 5 free online WebM to MP4 converters.

Online Tool	Ads	Limitations	Batch Converting	Advanced Settings	Privacy Risks
FreeConvert	★★★★✰	Max file size: 1GB	Yes	Yes	Yes
CloudConvert	★✰✰✰✰	Limited number	Yes	Yes	Yes
Convertio	★✰✰✰✰	Max file size: 100MB	only two WebM files	Yes	Yes
Zamzar	★✰✰✰✰	Only 2 free daily conversions	Yes	No	Yes
Veed.io	★✰✰✰✰	No batch conversion	No	Yes	Yes

1. FreeConvert

www.freeconvert.com

FreeConvert lives up to its name by being a versatile tool for converting various file formats, including WebM to MP4. The platform allows you to upload files from local devices, Dropbox, Google Drive, or through a URL, making the conversion process convenient. Converting WebM to MP4 using FreeConvert is a straightforward task. However, it's worth noting that in comparison to other free online WebM to MP4 converters, FreeConvert's interface includes numerous ads.

Limitations:

❌ Max file size: 1GB

❌ Frequent ads

❌ Slow conversion speed

2. CloudConvert

cloudconvert.com

CloudConvert is a free online file converter tool that effectively transforms WebM into MP4 files. This online WebM to MP4 converter is characterized by the wide range of file types that can be converted. It supports nearly all audio, video, document, ebook, archive, image, spreadsheet, and presentation formats. You can use the options to control video resolution, quality, and file size, enhancing the flexibility and customization of the conversion process.

Limitations:

❌ Limit the number of conversions for free

❌ During peak hours, free tasks need to queue up for conversion

❌ No basic video editing features

3. Convertio

convertio.co

Convertio is an online WebM to MP4 converter with outstanding advantages: no software installation required, no device space occupation, and ease of use. It's ideal for occasional, quick, and simple WebM to MP4 conversions, especially if your device has limited performance or you prefer not to install any software.

However, its file size limit (100 MB), reliance on an internet connection, and the potential risks of processing sensitive files in the cloud are also factors to consider. Therefore, if your files are small and you're not extremely concerned about privacy, Convertio is a good choice. On the other hand, if you frequently convert large files, handle sensitive content, or require faster speeds and more extensive settings, professional desktop software like Any Video Converter may be more suitable.

Limitations:

❌ File size is limited to 100MB

❌ Visitors can only batch convert 2 WebM files

❌ Limited conversion minutes per day for free

4. Zamzar

www.zamzar.com

Zamzar is a well-known free online WebM to MP4 converter that supports various file formats. Unlike other online converters limited to local storage uploads, Zamzar provides additional options for uploading WebM videos from Box, Dropbox, URL, Google Drive, and OneDrive. After the conversion is finished, you can download the file directly from the web browser or choose to use your personal email address to receive the converted webm videos.

Limitations:

❌ The maximum file size is 50 MB for free conversion

❌ No video parameter adjustment

❌ The conversion speed is slow

❌ Only 2 free daily conversions

5. Veed.io

www.veed.io

Veed.io is a powerful online video editing platform. It's more than just a simple format converter; it's an all-in-one online tool that combines conversion, editing, subtitle generation, screen recording, and more. Whether you're using Windows, macOS, or a Chromebook, the experience is consistent, eliminating the hassle of downloading and installing software.

However, compared with professional software such as HandBrake and Any Video Converter, Veed.io provides very few video encoding parameter adjustment options.

Limitations:

❌ No batch conversion

❌ Limited options for customizing parameters

❌ Advanced editing tools require payment

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Part 4: FAQ About WebM to MP4 Video Converter

Q1: How to convert WebM to MP4 with FFmpeg?

To convert WebM to MP4 using FFmpeg, you can follow these steps:

Step 1: Download and install FFmpeg.

Step 2: Open a terminal (Linux or macOS) or command prompt (Windows) on your computer.

Step 3: Convert the WebM file to MP4 using the following command: "ffmpeg -i input.webm -c:v libx264 -c:a aac -strict experimental output.mp4".

Tips: "input.webm" is the file name you want to convert, and "output.mp4" is the file name after conversion.

Q2: How do I open a WebM file?

You can open WebM files in the following methods:

Method 1: Use a modern video player like VLC Media Player or PotPlayer.

Method 2: Drag and drop the WebM file into the browser to play it.

Method 3: Some video editing software (Adobe Premiere Pro) also supports the WebM format, and you can use this software to open and edit WebM files.

Q3: Can Adobe convert WebM to MP4?

Yes, Adobe Premiere Pro and Adobe Media Encoder can convert WebM files to MP4 format. You just need to drag and drop the WebM file into these two software, then select "H.264" in the menu bar to export the MP4 file.

Q4: Can I convert WebM to MP4 on iPhone?

The fastest method to convert WebM to MP4 on iPhone is to use the online conversion tools mentioned in the article, such as CloudConvert, Zamzar, and more.

Q5: Is FreeConvert legit?

Overall, FreeConvert is a legitimate and commonly used online converter, but it's recommended to pay attention to privacy and file security when using it. If you have sensitive files, you might want to consider a more secure alternative like Any Video Converter.

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Conclusion

In summary, among the many powerful free WebM to MP4 converters, Any Video Converter stands out for its efficiency, versatility, and user-friendliness. Not only does it complete conversions at breakthrough speeds (GPU acceleration speeds up to 130x), it also integrates batch processing, advanced parameter adjustments (encoder, resolution, bitrate, etc.), and one-stop features like downloading and AI editing.

This free WebM to MP4 converter allows you to easily handle all your video processing needs without switching software. Whether you're looking for cross-platform compatibility or sharing on social media, it is your reliable and efficient choice for converting WebM to MP4.