Does converting lose quality?

PNG output is lossless. JPG and WebP re-encode at the quality you pick before processing.

Video loads a transcoder into the browser on first use. Larger files take longer, and later runs are quicker.

No. These tools read and process files in your browser.

Do I need to sign in?

Local tools work without an account.

Keep files under 50 MB and PDFs under 80 pages so the browser stays stable.

Convert MOV, MKV, or WebM to MP4.

Or drop files here

Click to choose a file, or drop it here. Nothing is uploaded.

Adjust options if needed, then run. All work stays on this device.

Preview, then download. Nothing is kept on a server after you leave.