Niconico Video Downloader
Paste a nicovideo.jp link and save the public video as MP4.
Quick answer
Niconico Video Downloader saves public nicovideo.jp videos as MP4 files. Niconico wraps playback in its own player and often requires a login for higher quality, so the tool returns the best rendition available to anonymous visitors. Comments and overlays are not part of the video and are not saved. Region-restricted titles may fail outside Japan. Files last two hours.
Capability status verified on 2026-10-29. Results depend on the source URL and the media the platform makes publicly accessible.
| Public content | Yes |
|---|---|
| Private or login-gated content | No |
| Accepted link forms | https://www.nicovideo.jp/watch/{smid}; https://nico.ms/{smid} |
| Short links / alternate domains | Yes — nico.ms |
| Content types | Public videos (limited channels) |
| Output | MP4 |
| Audio | Included |
| Watermark removal | No |
| Batch download | No |
| Available quality | anonymous tier, often 360p–720p |
| Last verified | 2026-10-29 |
How to download Niconico videos
- Open the video on nicovideo.jp and copy its sm or so ID link.
- Paste the link above.
- Save the MP4 that the public player exposes.
Known limitations
- Login-only premium quality is not accessed.
- Region-restricted titles may fail outside Japan.
Frequently asked questions
Can it save the highest quality that requires a Niconico login?
No. Premium and login-only renditions are skipped. The tool returns the best anonymous tier, which is often 360p to 720p.
Are the scrolling comments included in the file?
No. Niconico comments are a separate overlay, not part of the MP4. Only the clean video and its audio are saved.
Why does a Niconico link fail outside Japan?
Some videos are region-locked to Japanese IP addresses. When the page blocks your region, no media is served.
Do channel videos work?
Channel-hosted videos have their own access rules and may fail. Regular watch pages are the most reliable input.
Verification and methodology
This capability profile was last verified on 2026-10-29 with SaveVideoKit version 0.0.15. A platform is marked supported only when a public test URL can be parsed, processed, and returned as a playable file.
Read the testing methodology, review the complete supported-sites matrix, or see the capability changelog.