Convert Video Format

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Click to upload or drag and drop

Video files only (Max 10MB)

ℹī¸ How it works:
  • Upload your video file
  • Choose an output format and quality
  • Download the converted video

Change a Video's File Format

Most people are here because something will not play. A camera gave you a MOV, a download gave you an MKV, an old archive gave you an AVI — and the device or website you need it on wants an MP4. Upload the file, choose the format you need and a quality level, and download the result. Nine formats are available, in either direction. No sign-up and no watermarks.

How to Change a Video File Format

  1. Click the upload area above or drag and drop your video (up to 10 MB).
  2. Choose the output format and a quality preset (High, Medium or Low).
  3. Convert and download your video.

Common Conversions

  • MOV to MP4 – MOV is what an iPhone and most Apple software produce. A perfectly good format, but Windows machines, older TVs and plenty of upload forms would rather have MP4.
  • MKV to MP4 – MKV is common for downloads and archives, and is barely supported outside dedicated players like VLC.
  • AVI to MP4 – the format of old camcorder footage and 2000s video files: large, dated and awkward on anything modern.
  • WEBM to MP4 – WEBM comes from web downloads. It plays in browsers and often nowhere else.
  • WMV to MP4 – the old Windows Media format, which almost nothing outside Windows will open.

The Nine Output Formats

  • MP4 – the most widely compatible format there is, and the right answer unless you have a specific reason otherwise
  • WebM – efficient and web-friendly, encoded with VP9
  • MKV – a flexible container, popular for archiving
  • MOV – the QuickTime format used across Apple software
  • AVI – an older Microsoft container, still required by some legacy software
  • WMV – Windows Media, for older Windows-only workflows
  • FLV – Flash video, occasionally still needed for legacy systems
  • OGV – the open Ogg Theora format
  • 3GP – a small, low-resolution format made for old mobile phones

Quality Presets

  • High – visually very close to the source, with a larger file. Use it when the picture matters more than the size.
  • Medium – the default, and the right answer nearly always. Audio is kept at 128 kbps.
  • Low – noticeably softer, for when the file simply has to be small.

When You Might Need This

  • A video that will not play on your phone, TV or tablet
  • An upload form or website that rejects the format you have
  • Footage from a camera or phone that your editing software will not open
  • An MKV or AVI download that only VLC will play
  • Old camcorder or archive footage you want in something modern
  • A file you need to send to someone on a different operating system
  • Video for a web page, in a format browsers handle natively
  • Making a set of clips consistent before editing them together

Frequently Asked Questions

Convert it to MP4 and leave the quality on Medium. MP4 with H.264 video is the one combination that essentially every phone, tablet, TV and browser can play, which is why it is the default here. If a video refuses to open on a device, the format is the first thing to change — and nine times out of ten MP4 is the answer.

Upload the MOV, choose MP4 as the output, pick a quality and download. The same three steps apply to MKV, AVI, WEBM, WMV and the rest — there is no separate tool per format. Conversions run in both directions too, so you can go from MP4 back to MOV if some piece of Apple software insists on it.

Yes, and it is worth understanding why that matters. MKV and MP4 are both containers, and the video inside both is very often already H.264 — so in principle the file could be repackaged without touching the picture. This tool re-encodes instead, which costs a little quality for a change of container alone. At the High preset the difference is hard to see, but if you have a choice, converting once from your best source beats converting repeatedly.

MP4 is the safest choice — it plays on virtually any device, browser and app. Choose WebM for the web, MOV for Apple workflows, or one of the others only if a specific tool requires it.

Converting re-encodes the video, so there's some quality change. Pick the High preset to keep as much detail as possible, or a lower one when a smaller file matters more.

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