ToolNest

Video Converter

Convert between MP4, WebM, MOV, AVI, MKV and more — locally in your browser, with no upload.

Processed on your device — nothing is uploaded

⏳ Loading video engine… (first time only, ~30 MB, cached afterwards)
Drop your file hereor click to browse — processed locally, never uploaded
Output format

About the Video Converter

Convert any common video format to MP4 or WebM without installing software or uploading a single byte. ToolNest runs the full FFmpeg engine inside your browser, so conversions happen at the speed of your own device.

MP4 output is the universal choice — it plays everywhere from iPhones to smart TVs. WebM output produces smaller files that are perfect for websites. Because processing is local there are no conversion queues, no file-size caps and no watermark.

How to use the Video Converter

  1. 1Drop your video into the box — MOV, AVI, MKV, WebM, MP4 and more are supported.
  2. 2Choose the output format: MP4 for universal playback or WebM for smaller files.
  3. 3Press Convert and download the new file when it is ready.

Frequently asked questions

Which formats can I convert?

Input: MP4, MOV, WebM, AVI, MKV, WMV, M4V, 3GP and most other common containers. Output: MP4 (H.264 + AAC) or WebM (VP8 + Opus).

Is my file uploaded to a server?

Never. Conversion happens entirely inside your browser. Your file stays on your device from start to finish.

Which format should I choose?

Pick MP4 if you want the file to play everywhere. Pick WebM if you want a smaller file for the web and YouTube.

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