Convert videos between MP4, MOV, WEBM, AVI and MKV.
📁 Click to choose a file or drag & drop it here
Your file never leaves your device. Accepted: video/*
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A video converter changes a video file from one container/codec format into another, so it plays correctly on a different device, app, or platform. For example, an iPhone typically records in MOV, but many websites and Android devices expect MP4.
This converter supports the five most commonly needed formats: MP4, MOV, WEBM, AVI and MKV. Pick your source file, choose the target format from the dropdown, and the conversion runs entirely on your computer using an in-browser build of FFmpeg — the same open-source engine trusted by professional video software.
Because nothing is uploaded to a server, there's no waiting in a processing queue and no privacy concern about a third party handling your footage. It also means the tool works even with private or sensitive video content, since the file genuinely never leaves the tab you're working in.
Common reasons to convert a video include: making an MOV file from a phone playable on a Windows video editor that expects MP4, converting to WEBM for smaller, web-optimized playback, or converting an old AVI file to MP4 so it works with modern players and phones.
Conversion quality is preserved as closely as possible to the source; we don't apply any additional compression beyond what's required by the target codec, so if you also want a smaller file size, run the result through our Video Compressor afterward.
Container format and codec are two different things that often get confused. MP4 is a container that can hold H.264 or H.265 video, while MOV is Apple's own container, historically also built around similar codecs. WEBM, by contrast, is an open format designed specifically for the web, using VP8 or VP9 video compression which tends to produce smaller files at slightly higher processing cost.
If you're not sure which format to pick, MP4 is the safest general-purpose choice: it plays natively on essentially every phone, browser, and video editor without any additional plugins or codecs required, which is why it remains the default recommendation for sharing video across different devices and platforms.
Because browsers vary slightly in how much memory they allow a single tab to use, extremely large source files (well over a gigabyte) may occasionally run more reliably in Chrome or Edge than in older browser versions. If a large file fails to convert, try closing other tabs to free up memory, or split the video into smaller sections first using our Video Trimmer before converting each part.
Some older AVI files use codecs from decades ago that modern devices no longer decode natively — converting them to MP4 with a current codec not only improves compatibility but often future-proofs the file against the slow disappearance of legacy codec support in newer operating systems and apps.
Screen-recording software, drone cameras, and older digital cameras all tend to default to different formats, which is part of why a general-purpose converter like this one stays useful long after any single device or app changes its own export defaults.
Whichever target format you need, this tool handles the conversion in just a few clicks.
Converting between formats involves re-encoding, which can introduce a very small amount of quality loss, but we use high-quality codec settings to minimize this.
Yes — select your MOV file, choose MP4 as the target format, and click Convert.
WEBM uses the VP8 codec, which is more computationally intensive than H.264, so conversion can take a little longer depending on your device.
No, you can convert as many videos as you like, since everything runs locally in your browser.