01
Add your video
Drag in a video file — MOV, WebM, MKV, or AVI. The file is read locally; nothing is uploaded.
Change video format
Convert video online, right in your browser.
Convert video online — MOV to MP4, WebM to MP4, AVI to MP4, and more — with no sign-up and nothing uploaded.
Got a clip in the wrong format to upload, edit, or play? Pick the part you need and download an H.264 MP4. Your video never leaves your device — it's decoded and re-encoded right here in the page, on your own machine.
- No upload
- Runs 100% in your browser.
- MP4 output
- H.264 video with AAC audio.
- Trim as you go
- Convert just the range you want.
How it works
Three steps to a new video format.
02
Pick a range
Choose the start and end you want. The converter creates an MP4 for broad compatibility.
03
Preview & download
The video is converted in your browser. Play it on the page to check it, then download the file in its new format.
Output format
A compatible MP4 for common conversions.
MP4 (H.264 + AAC) — the most compatible format. Plays on almost every phone, computer, app, and editor. Best for MOV→MP4, AVI→MP4, and WebM→MP4.
Common jobs — MOV to MP4, WebM to MP4, MKV to MP4, and AVI to MP4, all done on your device with no upload.
Performance & privacy
Private by design — and honest about speed.
Nothing is uploaded — your video is converted entirely on your device, so it stays private.
Changing a format is a full re-encode, not a remux, that runs on a single thread in the browser, so it can take a while on longer or higher-resolution clips — a progress bar shows how it's going.
A re-encode incurs a small, unavoidable quality loss; the presets pick sensible quality so it stays minor and the result plays reliably.
No account, no watermark, no install — it runs in the browser you already have open.
Before you upload
Which container and codec does your platform want?
A platform can accept your container and still refuse your codec, so it is worth knowing what you have before you convert. The video resolution checker reads your file's container, video and audio codec, profile, pixel format, resolution, aspect ratio, duration and bitrate in your browser, then checks them against the published specs for YouTube, Shorts, TikTok, Reels, Meta ads, LinkedIn and X. Its platform video specs reference lists the containers and codecs each one accepts, dated and linked to its source.
Need more than a new format?
Turn the video into notes and a transcript.
If you want the words, not just a new format, Video to Notes can transcribe a video and write a summary, key points, and a timeline you can download. For YouTube links and longer videos, the Chrome extension does it right in your browser.
- Full transcript plus an AI summary
- Key points and a clickable timeline
- Export to Markdown, PDF, or HTML
FAQ
Convert video questions
How do I convert a video online?
To convert a video online, drop a video file onto the box on this page or choose one. Pick the range you want, then select Convert video. The video is re-encoded into the new format in your browser and offered as a download you can also preview first.
Is my video uploaded to a server?
No. The video stays on your device. It is decoded and re-encoded entirely in your browser — nothing is uploaded, and the converted video is returned straight to you as a download.
Which conversions are supported?
You can convert MOV, AVI, WebM, MKV, and other common source videos to MP4 with H.264 video and AAC audio. MP4 is the most compatible output for phones, computers, apps, and editors.
Is the conversion lossless and instant?
No. Changing a video's format is a full re-encode, not a remux, so it takes real time and there is a small quality loss — the presets pick sensible quality so it stays small. Because it runs on your own device on a single thread, longer or higher-resolution clips take longer; a progress bar shows how it is going, so keep the tab open.
Which video formats can I convert from?
Common non-MP4 video files work as the source — MOV, WebM, MKV, AVI, and more. The output is always MP4. Pick any range; very long or large files just depend on your browser and device memory.
Do I need to sign up?
There is no sign-up. Because everything runs in your browser, there is no usage limit on converting video.
Try it now
Change your video's format.
No account, no upload — just a clip and an MP4 output.