Free online ASF→MP4 converter. Fast, private, no sign-up.
If something is asking you for a MP4 file and all you have is a ASF, this page is the fix. Drop in your ASF file (a .asf) and download a ready-to-use MP4 file (a .mp4) — no software to install, no account to create, and no watermark on the output.
ASF is a video container. Converting it changes how the video and audio streams are packaged so the clip plays where you need it.
MP4 (H.264) is the most compatible video format in the world — it plays on virtually every device, browser and social platform.
Most people convert ASF to MP4 for compatibility — a website, app or device insists on MP4, and ASF simply won't open. MP4 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 ASF 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 ASF into a different format, or convert another format into MP4. 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.