Convert video between MP4, MOV, WebM, AVI, MKV & GIF
Video compatibility is mostly about containers and codecs. MP4 (H.264/AAC) plays on every device ever made; MOV is Apple's recording and editing format; WebM is the royalty-free web standard; MKV rules media libraries but plays almost nowhere natively; AVI is a legacy archive format; GIF is the universally supported — but hugely inefficient — animation. JoltFile's video converters translate between all of them, with quality-first defaults.
- MP4
- MOV
- WebM
- AVI
- MKV
In-browser video limit: 1 GB per file
Browser-based processing — your files never leave your device
All video conversions (12)
Every video conversion pair JoltFile supports, each with a step-by-step guide, a side-by-side format comparison, and answers to common questions.
- .mov.mp4To convert MOV to MP4, upload your .mov file above, select MP4, and download a video that plays on Windows, Android, browsers, smart TVs, and every social platform.MOV to MP4 guide
- .mp4.movTo convert MP4 to MOV, upload your MP4 above, choose MOV, and download a QuickTime-native file ready for Apple workflows.MP4 to MOV guide
- .avi.mp4To convert AVI to MP4, upload your .avi file above, select MP4, and download a modern video that plays on phones, browsers, and TVs.AVI to MP4 guide
- .mkv.mp4To convert MKV to MP4, upload your .mkv above, select MP4, and download a file that plays in browsers, on iPhones, smart TVs, and consoles.MKV to MP4 guide
- .webm.mp4To convert WebM to MP4, upload your .webm above, select MP4, and download a universally playable video.WebM to MP4 guide
- .mp4.webmTo convert MP4 to WebM, upload your MP4 above, select WebM, and download a royalty-free, web-optimized video.MP4 to WebM guide
- .mp4.gifTo convert MP4 to GIF, upload your video above, select GIF, trim to the moment you need, and download a looping animation that works in every chat app, forum, and slide deck — no play button required.MP4 to GIF guide
- .mov.gifTo convert MOV to GIF, upload your iPhone or camera clip above, select GIF, trim the moment you want, and download a looping animation you can paste into any chat, doc, or slide deck.MOV to GIF guide
- .webm.gifTo convert WebM to GIF, upload your .webm above, select GIF, trim the segment, and download an animation that plays absolutely anywhere — including ancient forums and email clients that have never heard of WebM.WebM to GIF guide
- .mkv.webmTo convert MKV to WebM, upload your .mkv above, select WebM, and download a royalty-free video that plays natively in every modern browser.MKV to WebM guide
- .mkv.movTo convert MKV to MOV, upload your Matroska file above, select MOV, and download a QuickTime-native video for Apple workflows and editing software.MKV to MOV guide
- .mp4.aviTo convert MP4 to AVI, upload your MP4 above, select AVI, and download a legacy-compatible video for older systems.MP4 to AVI guide
Video conversion questions, answered
What is the best video format for sharing?
MP4 with H.264 video and AAC audio. It plays natively on every browser, phone, TV, console, and social platform, and offers an excellent quality-to-size ratio. Only pick something else when a specific workflow demands it.
What's the difference between a video container and a codec?
The container (MP4, MKV, MOV) is the wrapper that holds streams; the codec (H.264, VP9, AV1) is the compression method used for the video and audio inside. Compatibility depends on both — which is why a converter sometimes only swaps the container (fast, lossless) and sometimes must re-encode.
Why are GIFs so much bigger than MP4 videos?
GIF stores every frame as a separate 256-color image with 1987-era compression, while modern video codecs encode only what changes between frames. Converting GIF to MP4 routinely shrinks files by 90% or more.
Will converting a video reduce its quality?
Re-encoding is technically lossy, but at high quality settings the result is visually indistinguishable from the source. When the codecs already match the target container (common for MKV→MP4), the streams can be copied without any quality loss at all.
FAQ provided by JoltFile.