Free online AVCHD→WebM converter. Fast, private, no sign-up.
If something is asking you for a WebM file and all you have is a AVCHD, this page is the fix. Drop in your AVCHD file (a .mts) and download a ready-to-use WebM file (a .webm) — no software to install, no account to create, and no watermark on the output.
AVCHD is a video container. Converting it changes how the video and audio streams are packaged so the clip plays where you need it.
WebM is an open, royalty-free video format built for the web, usually VP9 or AV1 — smaller than MP4 at similar quality and well supported in browsers.
The usual reason to convert AVCHD to WebM is file size or quality: WebM fits the job better, whether that means a smaller download, a cleaner edit, or broader support. The conversion runs through ffmpeg, the industry-standard media engine, re-encoding the streams with sensible high-quality defaults so the result plays cleanly on your target device.
It comes up when publishing online, submitting to a service with strict format rules, or archiving a collection in a single consistent format.
Privacy is the default here. Your AVCHD file is uploaded over an encrypted connection, converted, downloaded the moment it's ready, and then deleted automatically a short time afterwards. We never keep your files, never build a library of your content, and never make you sign up to download the result.
Ready? Use the converter above, or explore related conversions: turn AVCHD into a different format, or convert another format into WebM. Everything on Convert Me Pls is free, unlimited and watermark-free.
Yes. Convert Me Pls is completely free with no sign-up, no file-count limits and no watermarks added to your output.
Your files are uploaded over an encrypted connection, converted, and then deleted automatically a short time afterwards. We never keep your files and never build a library of your content.
We use the best available encoders (libvips, ImageMagick and ffmpeg) at high-quality settings for the cleanest possible result.
Conversions run on our servers and support large files comfortably; very large media is processed in a streaming pipeline.