MP4 to ASF
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Step 1: Select the MP4 video you want to convert to ASF, ideally using a source file with the best quality you have.
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Step 2: Start the conversion and wait while we encode your MP4 into ASF; longer or high bitrate videos may take more time.
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Step 3: When the download button appears, save your ASF file and test it in your target media player or streaming software.
You can upload and convert one MP4 video at a time, including files larger than 1 GB.
Measured on our servers
What to expect when converting MP4 to ASF
Real numbers from every conversion on this tool since 24 October 2026. Nothing here is estimated: we record how long each job took and how large the files were. File names and contents are never stored.
85 s
Typical processing time
for a 137 MB file (median)
40
Conversions
since 24 October 2026
205 MB
Largest file converted
since 24 October 2026
+530%
Output size
about 530% larger than the input
How long conversions take
share of all conversions
- under 1 s0%
- 1–10 s5%
- 10–60 s15%
- 1–5 min80%
- over 5 min0%
Times are server processing only, measured after the upload finished; upload and download are not included. Large files take longer, but the limit is the same for everyone: no account, no queue priority to buy. Updated 2026-11-04
