WMV to NSV - Online Video Converter

Convert WMV to NSV online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert WMV to NSV

[+] Drop WMV video here or click to select WMV, ASF

Output format

NSV (H.264 / AAC)

No transcoding (remux only)[i]

Mode[i]

Simple Advanced

Quality[i]

Resolution[i]

About WMV to NSV

Convert WMV to NSV. WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. NSV is Nullsoft's streaming container from the Winamp era. Streams may lack indexes; verify duration after conversion..

Why convert WMV to NSV?

Smaller files with NSV lossy compression.
Keep animation and transparency where supported.
Private, no upload - runs in your browser.

WMV vs NSV

Animation	Yes	Yes
Transparency	No	No
Compression	lossy	lossy
Typical use	WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper.	NSV is Nullsoft's streaming container from the Winamp era.

When not to convert WMV to NSV

Skip NSV for archival masters: lossy compression discards detail, so keep the WMV original.
Keep a master copy: repeated exports stack small losses, so archive WMV before batch NSV shares.

Limits

Starting point: WMV - WMV pairs Microsoft's WMV video with WMA audio in an ASF wrapper. Protected store files cannot be converted; use DRM-free sources. Streams may lack indexes; verify duration after conversion. Encode NSV (H.264 / AAC) from WMV at a bitrate near the source, and confirm the audio track before converting.

How conversion works

Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.

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FAQ

How do I convert WMV to NSV?

Drop your WMV file onto this page, choose quality and codec settings, then click Convert. The result downloads as NSV instantly. All processing runs in your browser.

What codec is used for NSV?

The default codec for NSV is H.264 / AAC. You can change the video and audio codec in Advanced mode.

How do you store my files?

We do not store any processed videos. All conversion happens entirely in your browser using FFmpeg WASM.