Can I upload WebM to social media after converting?

Yes, MP4 is accepted by all social media platforms including YouTube, Instagram, TikTok, Facebook, and Twitter. WebM has limited support on social platforms, so converting first ensures your uploads process correctly.

WebM to MP4 - For iPhone and Safari

Convert WebM to MP4 for iPhone and Safari compatibility. Make web videos play on all devices. Free, private, browser-based conversion.

Select Video

Drop WebM file here or click to browse

Screen recordings and web videos

Privacy

All processing happens in your browser using FFmpeg WebAssembly. Your videos never leave your device—completely private and secure.

Related Tools

Video to MP4 - Convert any video
Video to WebM - Create WebM
Compress Video - Reduce file size
Trim Video - Cut sections
Video to GIF - Animated images

AVI to MP4 Converter - Play AVI Files An…

Video to WebM Converter - For Chrome, Fi…

Video to AVI Converter - For Legacy Wind…

GIF to Video Converter - Convert GIFs to…

TS to MP4 Converter - TV Recordings to P…

View all Video transcoders →

Frequently Asked Questions

WebM is an open-source video format designed for the web, using VP8 or VP9 video codecs. It's common in screen recordings, YouTube downloads, browser-based video recordings, Twitch/Discord clips, and videos captured from websites. Many free screen recording tools default to WebM because it's royalty-free.

While newer iOS versions (14+) have limited WebM support, it's inconsistent and unreliable. Safari on older iPhones doesn't support WebM at all. Many iOS apps, including Photos and iMovie, can't handle WebM files. Converting to MP4 guarantees smooth playback across all Apple devices and apps.

Both are container formats. WebM uses VP8/VP9 codecs and is royalty-free, making it popular for web use. MP4 uses H.264/H.265 codecs and has universal hardware support. For web use, both work well. For compatibility with phones, TVs, editors, and social media, MP4 is the clear winner.

Some quality loss occurs when transcoding between different codecs (VP8/VP9 to H.264). At 'High Quality' settings, the difference is minimal and imperceptible for most content. The 'Best Quality' setting minimizes loss further but creates larger files.

Yes, if you've downloaded a video from YouTube in WebM format, simply upload it here to convert to MP4. The converted file will play on any device, including iPhones, game consoles, smart TVs, and in video editing software.

For screen recordings with text and UI elements, use 'High Quality' or 'Best Quality' to preserve sharpness. For general video content, 'High Quality' provides excellent results. Choose 'Smaller File' when file size matters more than perfect quality.

Keep 'Original' to preserve your source resolution. Choose 1080p or 720p to reduce file size when full resolution isn't needed—ideal for sharing online. 480p creates very small files suitable for mobile viewing or messaging apps.

No. All processing happens entirely in your browser using FFmpeg WebAssembly. Your video files never leave your device, making this tool completely private and secure. You can even use it offline after the page loads.

Yes, but browser memory limits may affect very large files (over 500MB). For large files or frequent batch conversions, consider desktop software like HandBrake. For occasional conversions under 500MB, this browser tool works perfectly.

WebM to MP4 - For iPhone and Safari

Select Video

Quality

Resolution

Conversion Complete

Privacy

Related Tools

Related Tools