Free online MP4→ASF converter. Fast, private, no sign-up.
Going from MP4 to ASF takes a couple of clicks: drop the file in, download the result. Drop in your MP4 file (a .mp4) and download a ready-to-use ASF file (a .asf) — no software to install, no account to create, and no watermark on the output.
MP4 (H.264) is the most compatible video format in the world — it plays on virtually every device, browser and social platform.
ASF is a video container. Converting it changes how the video and audio streams are packaged so the clip plays where you need it.
Most people convert MP4 to ASF for compatibility — a website, app or device insists on ASF, and MP4 simply won't open. ASF is widely supported, which makes it a dependable target. 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 MP4 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 MP4 into a different format, or convert another format into ASF. 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.