Are my MP4 files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and convert something. You will see the page load, plus the analytics and advertising the site is paid for with — and nothing carrying your file.

Is converting MP4 to WebP free?

Yes. There is no account, no watermark and no limit on how many files you convert — it runs on your own machine, so it costs us nothing to let you. Files up to 100 MB are handled in the browser.

Does converting MP4 to WebP lose quality?

No. WebP stores the same content without discarding anything, so the result is identical in quality to the original. One frame, at full resolution. A still from compressed video carries that compression — a fast-moving moment looks softer than a static one, which is the video’s own encoding rather than anything this conversion does.

Do I need to install anything to open WebP files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the WebP afterwards needs whatever software normally handles WebP Image on your device.

MP4toWebP

Convert MP4 to WebP

Up to 100 files at once. Mixed formats are fine.

You can convert MP4 to WebP free and without an account: drop the file above and the WebP is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What MP4 and WebP are for

The video format that plays everywhere. If in doubt, this is the answer.

Google format for the web. Roughly 30% smaller than JPG at the same quality, with transparency.

How to convert MP4 to WebP

Drop your MP4 file onto this page, or click to pick one.
Choose WebP as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished WebP file.

MP4 vs WebP: what changes

MP4 compared with WebP
	MP4	WebP
Full name	MPEG-4 Video	WebP Image
File extension	.mp4	.webp
Media type	video/mp4	image/webp
Compression	Lossy — file size is bought with quality	Either, depending on the setting

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.
What can be lost: One frame, at full resolution. A still from compressed video carries that compression — a fast-moving moment looks softer than a static one, which is the video’s own encoding rather than anything this conversion does.

MP4 to WebP: common questions

Are my MP4 files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and convert something. You will see the page load, plus the analytics and advertising the site is paid for with — and nothing carrying your file.
Is converting MP4 to WebP free?: Yes. There is no account, no watermark and no limit on how many files you convert — it runs on your own machine, so it costs us nothing to let you. Files up to 100 MB are handled in the browser.
Does converting MP4 to WebP lose quality?: No. WebP stores the same content without discarding anything, so the result is identical in quality to the original. One frame, at full resolution. A still from compressed video carries that compression — a fast-moving moment looks softer than a static one, which is the video’s own encoding rather than anything this conversion does.
Do I need to install anything to open WebP files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the WebP afterwards needs whatever software normally handles WebP Image on your device.