Video Converter
Convert video to MP4, WebM, MKV, MOV or AVI
About this tool
Convert a video into a different format and codec without installing anything. Pick MP4 (H.264) for maximum compatibility, WebM (VP9) for the web, or MKV, MOV and AVI for other workflows. Your file is processed entirely on your device and is never uploaded.
Media processing uses a local engine in your browser. The first run may download the processing runtime once; afterward, conversions stay on your device so footage is not uploaded to DevToolDeck.
How to use it
- Select the video or audio file to process.
- Choose format, quality, or edit options for this tool.
- Start processing and wait for the local engine to finish.
- Download the output file to your device.
Common use cases
- Convert clips for editing or social uploads.
- Shrink large recordings before sharing.
- Trim intros/outros without a full NLE.
- Extract audio or mute tracks privately.
Frequently asked questions
Which format should I choose?
MP4 (H.264) plays almost everywhere and is the safest choice. WebM (VP9) is great for the web, while MKV, MOV and AVI suit specific editors and devices.
Is there a file size limit?
There is no fixed limit, but everything runs in your browser's memory. Very large or long videos take longer and use more RAM, so shorter clips convert fastest.
Are my videos uploaded anywhere?
No. Conversion happens locally on your device, so your video never leaves your computer.
Does Video Converter upload my files or text?
No. Processing is designed to run in your browser. Your inputs are not uploaded to DevToolDeck servers for conversion.
Do I need an account?
No. You can use the tool immediately without signing up.
Is the tool free?
Yes. DevToolDeck tools are free to use in the browser. The site may show ads to keep the service available.