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MondayKit

Video tools

Convert video to MP4 – free, no upload

Convert MOV, WebM, MKV, AVI and most other videos to MP4 or WebM in your browser. Same resolution, no watermark, nothing uploaded.

  • No uploadYour files are processed on your device and never sent anywhere.
  • FastNo upload or download wait – results appear in seconds.
  • Free, no signupNo account, no watermark and no daily limit.
Video converter

Processed in your browser. Files are never uploaded.

or drop a file here

How to convert video to MP4 – free, no upload

  1. Choose a video (MOV, WebM, MKV, AVI, MP4 and more).

  2. Pick MP4 or WebM.

  3. Click Convert and download the file.

  • No uploadYour files are processed on your device and never sent anywhere.
  • FastNo upload or download wait – results appear in seconds.
  • Free, no signupNo account, no watermark and no daily limit.

Convert a video to MP4 (or WebM)

Choose a video and pick MP4 or WebM. The converter re-encodes it in your browser and you download the new file. MP4 (H.264 video, AAC audio) plays on almost every phone, laptop, TV and website. WebM (VP9, Opus) is for sites and tools that ask for it. The resolution stays the same, there is no watermark, and the video is never uploaded.

Common conversions

From To Why
MOV (iPhone, Mac) MP4 Plays on Windows, Android and upload forms
WebM (screen recordings, downloads) MP4 Wider support for editing and sharing
MKV / AVI MP4 Plays in more apps
MP4 WebM A site or developer asks for WebM

Tips

  • Choose MP4 unless you have a reason to use WebM.
  • Trim first if you only need part of a long video. It saves time.
  • To shrink the file as well, run Compress video afterwards.

Limits

DRM-protected videos and some unusual codecs can’t be converted. Long or 4K videos can be slow on a phone. The first run downloads the converter once.

Need only the sound? Use Extract audio from video to get an MP3. Want a short loop? Make a GIF from the video.

Frequently asked questions

How do I convert MOV to MP4?

Choose the MOV file (for example from an iPhone), pick MP4 and convert. The MP4 plays on Windows, Android and most websites.

MP4 or WebM – which should I choose?

MP4 (H.264 + AAC) plays almost everywhere. Pick WebM (VP9 + Opus) only if a website or tool asks for it.

Does converting change the resolution?

No. The frame size stays the same. Use Compress video if you need a smaller file.

Which input formats work?

Most common formats, including MP4, MOV, WebM, MKV and AVI. A rare codec may fail, and the page shows the error instead of a broken file.

Is my video uploaded?

No. Conversion runs in your browser with ffmpeg.wasm.

Related tools

Compress videoMake a video file smaller as an MP4 – free, no upload, no watermark.Trim videoCut a video to the part you need and download an MP4 – no upload.Extract audio from videoConvert MP4 and other videos to MP3 – free, no upload.Video to GIFTurn a short video clip into an animated GIF – no upload, no watermark.Mute videoRemove the sound from a video and download a silent MP4.

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