How do I convert a video to MP4 in my browser?

Drop your MOV, MKV, AVI or WebM file into the Video Converter, choose MP4 as the output, and click Convert. The file is re-encoded on your own device and never uploaded, then you can preview and download the MP4.

Does the converter upload my video anywhere?

No. The Video Converter runs entirely in your browser. Your video is read from your device, converted locally, and never uploaded to ArrayKit or any server.

What is the difference between the Video Converter and the Video Compressor?

The converter changes a video's format — for example MOV to MP4 — while keeping the quality; the compressor focuses on making a file smaller with quality and resolution controls. Use the converter for compatibility and the compressor for size.

Should I convert to MP4 or WebM?

MP4 plays almost everywhere — phones, editors and social apps — so it is the safest choice. WebM produces smaller files and is ideal for websites, but it encodes more slowly in the browser.

Can I convert MKV or AVI files?

Yes. The converter accepts common containers including MOV, MKV, AVI, WebM and MP4 as input and outputs MP4 or WebM. Some exotic or DRM-protected codecs may not be supported.

Is there a size limit on videos I can convert?

There is no imposed file-size limit, so you can convert clips of any length. The practical ceiling is your device's memory, since the conversion happens locally in one browser tab.

Convert Video in Your Browser

Convert MOV, MKV, AVI, WebM and MP4 videos to MP4 or WebM — right in your browser, and your video never leaves your device.

The Video Converter runs entirely in your browser. Your video is decoded and re-encoded on your own device and is never uploaded to ArrayKit — the file you load never leaves your computer.

Open the Video Compressor

About Video Converter

Video Converter changes a video from one format to another right in your browser, so you can turn a MOV, MKV, AVI or WebM file into a widely compatible MP4 — or convert an MP4 into WebM for the web — without uploading anything. Drop in a file, choose the output format, and the video is re-encoded on your own device; it never leaves your computer. Conversion uses quality-preserving defaults rather than aggressively shrinking the file, so the result looks like the original in a format that plays where you need it. There is no imposed file-size limit, and you can preview both the original and the converted video side by side before downloading. Built for anyone who has a clip in the wrong format for a phone, an editor, a website or a messaging app.

Features

Convert MOV, MKV, AVI, WebM and MP4 into MP4 or WebM
Re-encodes locally in your browser — your video is never uploaded
Quality-preserving defaults, so the converted file matches the original
Preview the original and converted video side by side before downloading
MP4 output plays almost everywhere; WebM is smaller and web-friendly
No imposed file-size limit, and you can cancel a long conversion at any time
Live progress with elapsed time and conversion speed

How to use the Video Converter

Drop a video file onto the page or click to choose one
Pick the output format — MP4 or WebM
Click Convert and watch the live progress
Preview the result and download the converted video

Example

Input

clip.mov

Output

clip.mp4

A MOV file converted to a widely compatible MP4, entirely in your browser.

Common errors & troubleshooting

Conversion is slow on a long or high-resolution video. — Everything runs locally in a single browser tab. Converting to MP4 is faster than WebM, and a shorter clip completes sooner.
The browser runs out of memory on a very large file. — Try a shorter clip, or convert to MP4, which is lighter to encode than WebM.
The converted file is larger than the original. — Conversion preserves quality rather than shrinking the file. If you mainly want a smaller file, use the Video Compressor instead.
The video will not load or errors out immediately. — The source may use an unsupported or DRM-protected codec. Try a standard MOV, MP4, MKV, WebM or AVI export from your camera or editor.

Frequently asked questions

How do I convert a video to MP4 in my browser?: Drop your MOV, MKV, AVI or WebM file into the Video Converter, choose MP4 as the output, and click Convert. The file is re-encoded on your own device and never uploaded, then you can preview and download the MP4.
Does the converter upload my video anywhere?: No. The Video Converter runs entirely in your browser. Your video is read from your device, converted locally, and never uploaded to ArrayKit or any server.
What is the difference between the Video Converter and the Video Compressor?: The converter changes a video's format — for example MOV to MP4 — while keeping the quality; the compressor focuses on making a file smaller with quality and resolution controls. Use the converter for compatibility and the compressor for size.
Should I convert to MP4 or WebM?: MP4 plays almost everywhere — phones, editors and social apps — so it is the safest choice. WebM produces smaller files and is ideal for websites, but it encodes more slowly in the browser.
Can I convert MKV or AVI files?: Yes. The converter accepts common containers including MOV, MKV, AVI, WebM and MP4 as input and outputs MP4 or WebM. Some exotic or DRM-protected codecs may not be supported.
Is there a size limit on videos I can convert?: There is no imposed file-size limit, so you can convert clips of any length. The practical ceiling is your device's memory, since the conversion happens locally in one browser tab.

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PDF to Images — Render PDF pages to PNG or JPG images you can download.
EXIF Viewer & Remover — View and strip EXIF metadata (including GPS) from photos — nothing is uploaded.
SVG Optimizer — Minify SVG — strip comments, metadata and editor cruft, and collapse whitespace.