WebM to MOV Converter
Convert WebM files, the VP8, VP9 or AV1 videos that browsers and web apps produce, into QuickTime MOV with H.264 and AAC so Apple's editing and presentation apps accept them.
Video Converter
or drop MP4, MOV, MKV … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
Lower is better quality and a bigger file. 18 looks identical to the source, 23 is the default, 28 and above shows visible softening.
Frames per second. Keep the source rate unless a platform asks for a specific one; 15–20 fps is plenty for GIFs.
Only used for PowerPoint files and single still images: how long each slide or picture stays on screen.
Auto uses AAC for MP4/MOV and Opus for WebM. Copy keeps the original sound untouched when the new format supports it.
192 kbps is transparent for music; 128 kbps is enough for speech.
Width of the animation in pixels; height follows the aspect ratio. 480 px suits chats, 720 px or more gives a high-quality GIF but a much larger file.
GIF holds at most 256 colors. Fewer colors make a smaller file but cause banding on gradients and skin tones.
Mixes palette colors in a fine pattern to hide banding. Sierra gives the smoothest result; none gives the smallest file.
Whether the animation repeats endlessly or plays one time and stops.
Optional. Seconds (e.g. 75) or minutes:seconds (1:15). Leave empty to start at the beginning.
Optional. Same format as the start time. Leave empty to keep everything up to the end.
The converted file will be at or just under this size.
How to use this tool
- 1
Add your WebM files
Select up to 20 .webm files of 95 MB or less each, such as screen captures, downloaded clips or exports from a web animation tool.
- 2
Leave MOV and H.264
Convert to MOV with Video codec H.264 and Audio codec AAC is the combination Final Cut Pro, iMovie and Keynote read. Use Start at and End at to keep only part of a recording.
- 3
Convert and import
Press Convert to MOV, save the files and import them into your project. The uploads are removed from our servers after 30 minutes.
How do I convert WebM to MOV for a Mac editor?
Upload the .webm, keep Convert to MOV with H.264 video and AAC sound, and press Convert to MOV. The result imports into Final Cut Pro, iMovie and Keynote without plug-ins.
Where WebM clips get stuck on a Mac
Google announced WebM at its I/O conference in May 2010, built on the VP8 codec it had acquired with On2 Technologies, as a royalty-free format for HTML5 video. It succeeded on the web: Chrome screen recorders, Loom-style tools, Discord clips, animated stickers and many motion-graphics exporters save WebM by default.
Apple went the other way. Safari learned to play WebM years later, but QuickTime Player, iMovie, Final Cut Pro and Keynote still do not open it. That is the gap this conversion closes. If the clip is headed for Windows, a phone or a web upload instead, WebM to MP4 is the more portable choice.
WebM to MOV or WebM to MP4: which one you need
QuickTime movie
Apple's own container, identified by name in many Mac templates and client specs.
- Same H.264 and AAC inside as an MP4
- Expected by some Final Cut and Motion workflows
- Opens on Windows through most players, not all
MPEG-4 Part 14
The general-purpose container that every platform and upload form accepts.
- Plays on Android, Windows and smart TVs
- Accepted by YouTube, Instagram and email
- Imports into Apple editors as well
WEBM
WebM video
WebM is an open, royalty-free video format released by Google in 2010 for the web. It is based on Matroska and holds VP8, VP9 or AV1 video with Vorbis or Opus audio, and VP9 WebM can include an alpha channel for transparent video. Browsers play it natively, and browser screen recorders often produce it. Apple devices, video editors and social platforms have historically had weaker support than for MP4.
- Compression
- Lossy
- Transparency
- Yes
- Animation
- –
- Introduced
- 2010 · Google
MOV
QuickTime movie
MOV is the QuickTime container format created by Apple in 1991. iPhones record MOV files, and professional editing tools use it for high-quality codecs such as Apple ProRes, including versions with transparency. It can hold multiple video, audio, timecode and subtitle tracks. MOV files from editing software can be very large, and some Windows apps, Android phones and websites play them poorly or not at all.
- Compression
- Lossy or lossless
- Transparency
- Yes
- Animation
- –
- Introduced
- 1991 · Apple
WebM goes to MOV when a clip born in a browser has to enter Apple's editing world, because Final Cut Pro, iMovie and Keynote were built around QuickTime and never learned VP9 or Opus.
WebM to MOV converter limits
- per WebM file
- 95 MB
- files in one batch
- 20
- before uploads are deleted
- 30 min
- MOV preset
- H.264 + AAC
Transparent WebM overlays and the MOV result
VP9 can carry an alpha channel, so some lower thirds, stickers and animated logos arrive as WebM with a see-through background. H.264 has no alpha channel, which means the converted MOV fills those areas with solid color. For an overlay that must stay transparent in Final Cut Pro, export it again from the animation tool as ProRes 4444 or HEVC with alpha.
For everything with a normal opaque picture, H.264 at the default Quality (CRF) of 23 looks the same as the WebM on a laptop screen. Short loops for chat are often better as GIFs; see how to make a GIF from a video.
WebM to MOV questions
Why does iMovie grey out my .webm file?
iMovie and Final Cut Pro only list formats that macOS decodes through its own media framework, and Apple has never added the WebM container or VP8 and VP9 video to it. Converting to MOV with H.264 gives them a file they recognize immediately.
Should I pick H.264 or H.265 for the MOV?
H.264 is the default because it edits smoothly on any Mac. H.265 makes a smaller file and plays on any Mac running macOS High Sierra (2017) or later, but scrubbing a timeline on an older Intel Mac can lag. For a Keynote slide either works.
Can I keep the original sound with Copy original?
Not usefully. WebM sound is Opus or Vorbis, and Apple's editors do not read either inside a MOV. Leave Audio codec on AAC, which re-encodes the speech or music at 192 kbps with no audible change.
Can I drop a WebM straight into Keynote?
Keynote accepts movies that macOS can play, so a WebM is refused or added without a picture. Convert to MOV first; the slide then plays the clip like any other video and exports with the deck.
Why is the MOV larger than the WebM?
VP9 and AV1 squeeze more picture into each megabyte than H.264, so the same clip typically grows after conversion. If the MOV is only for viewing, set Quality (CRF) to 26 or lower Resolution to 720p.
Can I trim the WebM while converting?
Yes. Enter times in Start at and End at as seconds or minutes:seconds, for example 0:12 and 1:40, and only that stretch is written to the MOV.