The Format Converter converts any video file between the most common formats — MP4, MOV, WebM, AVI, MKV, and more — directly in your browser. No software, no uploads, no waiting for a server. This walkthrough covers every setting and when to use each output format.
When You Need to Convert a Video Format
- MOV from iPhone/Mac → MP4 — MOV is Apple’s default; MP4 is universally compatible everywhere else
- WebM or AVI → MP4 — for uploading to platforms that prefer or require MP4
- MP4 → WebM — for HTML5 video embeds that benefit from WebM’s smaller size in browsers
- MKV → MP4 — MKV containers are common for downloaded content; MP4 is more portable
- Any format → MP4 before using other tools — all VideoToolShack tools work best with MP4 H.264 input
Step-by-Step: Converting a Video Format
Navigate to videotoolshack.com/tools/format-converter.php. No account, no installation required.
Drop or select your source video. Any common format is accepted as input. The file is processed entirely on your device — nothing is uploaded.
Select the format you need. When in doubt, choose MP4 — it’s the most compatible format across all platforms, devices, and editing tools.
Click Convert. Processing runs locally and is typically fast even for large files. Download your converted video when complete.
Which Output Format to Choose
| Format | Use When | Compatibility |
|---|---|---|
| MP4 (H.264) | General sharing, social media, uploading anywhere | Universal — plays everywhere |
| MOV | Apple ecosystem, Final Cut Pro, iMovie | Excellent on Mac/iOS; variable elsewhere |
| WebM | HTML5 web embedding, smaller browser files | All modern browsers; limited device support |
| AVI | Legacy Windows compatibility | Wide but dated; large file sizes |
| MKV | Archiving with multiple audio/subtitle tracks | Good on PC; limited on mobile/TV |