• Download
  • Testimonials
  • About
  • Blog
  • Pricing
GithubGitHub (17.2k)

Cap is the open source alternative to Loom. Lightweight, powerful, and cross-platform. Record and share in seconds. Import your existing Loom videos seamlessly.

© Cap Software, Inc. 2026.

Terms of ServicePrivacy Policy

Product

  • Blog
  • Docs
  • Pricing
  • Download
  • Open Source
  • Join the community
  • OSS Friends

Additional Links

  • Loom Video Importer
  • Loom Video Downloader
  • Screen Recorder
  • Free Screen Recorder
  • Screen Recorder for Mac
  • Screen Recorder for Windows
  • Screen Recording Software
  • Cap vs Loom
  • Student Discount

Cap

  • About
  • Testimonials
  • FAQs
  • Self-hosting
  • Email Support
  • Help Center
  • Trust Portal
  • Chat Support
  • System Status

Use Cases

  • Remote Team Collaboration
  • Employee Onboarding Platform
  • Daily Standup Software
  • Online Classroom Tools
  • Agencies

Socials

  • X (@Cap)
  • Discord
  • LinkedIn
Tools
  • WebM to MP4
  • MOV to MP4
  • AVI to MP4
  • MP4 to GIF
  • MP4 to MP3
  • MP4 to WebM
  • Video Speed Controller
  • Trim Video
LoginSign Up
Tools/WebM to MP4 Converter

WebM to MP4 Converter

Convert WebM videos — including browser screen recordings and VP9 files — to the universally compatible MP4 format directly in your browser — free, private, and no installation required

WEBM to MP4 Converter

From:
WEBMMP4MOVAVIMKV
→
↓
To:
MP4

Drag and drop your WEBM file here

or click to browse (max 500MB)

This converter works entirely in your browser. Your files are never uploaded to any server.

Why Use This WebM to MP4 Converter

A fast, free, and private way to convert WebM videos to MP4 — entirely in your browser with no uploads and no quality loss.

1

100% Browser-Based

The entire conversion runs locally in your browser. No server uploads, no processing queues — your files stay on your device at all times.

2

Works with Screen Recording Output

Most browser-based screen recorders, Chrome extensions, and MediaRecorder tools output WebM files. Cap's converter handles VP8 and VP9 WebM files and turns them into shareable MP4s.

3

Universal MP4 Output

The output is a standard H.264 MP4 file that plays on iPhones, Android phones, smart TVs, and every video hosting platform including YouTube, Vimeo, and Google Drive.

4

Complete Privacy

Your video files never leave your device. Unlike other online converters that upload your content to remote servers, all processing happens client-side.

5

No Sign-Up or Installation

No software downloads, browser extensions, or accounts required. Just open the page and start converting — works instantly in Chrome, Edge, and Brave.

6

Unlimited Free Conversions

Convert as many WebM files to MP4 as you need with no daily limits, no watermarks, and no hidden fees.

Frequently Asked Questions

How do I convert WebM to MP4 online?

Open Cap's WebM to MP4 converter, drag and drop your WebM file (or click to browse), then click Convert. The entire process runs in your browser — your file never leaves your device. Once complete, click Download to save the MP4 file.

Is the WebM to MP4 converter free?

Yes, completely free with no limits on the number of conversions. There are no watermarks, no sign-up required, and no hidden fees. The converter runs entirely in your browser at zero cost.

Why convert WebM to MP4?

WebM is an open-source format developed by Google using VP8 or VP9 video codecs — it's the default output of browser-based screen recorders, Chrome MediaRecorder, and many web-based tools. However, WebM files are not supported by iPhones, many Android video editors, Windows Media Player, or social platforms like Instagram and TikTok. MP4 (H.264) is the universal standard supported by virtually every device, platform, browser, and video hosting service. Converting to MP4 ensures your video plays anywhere without compatibility issues.

Will converting WebM to MP4 reduce video quality?

Quality is preserved as closely as possible during conversion. The converter re-encodes to H.264 MP4 at high quality settings, which is visually lossless for most use cases. For sharing, uploading, or playing on other devices, the output quality will look identical to the original.

Is there a file size limit?

The converter supports WebM files up to 500 MB. For smooth in-browser performance, files under 200 MB convert fastest. For very large WebM files, consider trimming the video first to keep only the section you need.

Does this work with screen recording WebM files?

Yes. Browser-based screen recorders, Chrome extensions, and tools using the MediaRecorder API typically produce VP8 or VP9 WebM files. Cap's converter handles both VP8 and VP9 WebM files and outputs a universally compatible H.264 MP4.

Does the converter work on mobile?

The converter works best on desktop browsers (Chrome, Edge, Brave). Mobile browser support for the underlying video processing APIs is still limited, so desktop is recommended for the most reliable results.

Do I need to install any software?

No. The converter runs entirely in your browser — no downloads, no plugins, no extensions required. Just open the page and start converting. All processing happens locally on your device for complete privacy.

Cap is the open source Loom alternative

Record, edit, and share video messages with Cap. 100% open source and privacy focused. Records directly to MP4 — no conversion needed.

Download Cap Free