Will the downloaded file include the original audio?

Yes, it is planned to save videos as standard MP4 files with the original resolution and audio track intact.

Will the extension detect channel-exclusive videos I can access?

The extension is intended to work with standard user uploads and channel-exclusive videos your account can access, as long as they are playable in your logged-in browser session.

How does the extension handle interrupted downloads?

Automatic retry logic is being built to resume downloads where they left off, so you will not lose progress if the connection drops.

Will Japanese characters in video titles display correctly?

The extension is planned to preserve Unicode characters in filenames, so kanji, hiragana, and katakana will appear correctly on Windows, macOS, and Linux.

Does the extension store my Niconico login credentials?

No, session-aware authentication is designed to use your existing login without storing any credentials. Everything runs locally in your browser.

What happens if I try to download a video I already saved?

Duplicate detection is intended to skip videos that are already in your local downloads, helping keep your library clean and efficient.

Which browsers will the Niconico Downloader support?

It is expected to work on Chrome, Firefox, Edge, Brave, and Opera. Safari and mobile browsers are not planned for support.

Can I download Niconico live streams or timeshift recordings?

No, the extension is being developed for on-demand video pages only. Live broadcasts and timeshift recordings are not currently supported.

Use Niconico Downloader only for videos you own or have permission to save. Respect the platform and creators, and do not redistribute downloaded videos without the necessary rights.

Downloader Video Downloaders

Niconico Downloader

Name: Niconico Downloader
Brand: SERP Apps
SKU: niconico-downloader
Availability: PreOrder
Rating: 4.9 (3 reviews)

Save Niconico videos as MP4s with original Japanese titles and watch them anywhere, even without internet.

Join Waitlist

Browser extension

Current-page workflow

Browser downloads

40,000+ SERP Apps users

Niconico Downloader is an independent product not affiliated with or endorsed by Niconico, DWANGO Co., Ltd. or any subsidiaries or affiliates. All trademarks are property of their respective owners and use of them does not imply affiliation or endorsement.

Try it free — 3 downloads, no credit card

Your downloads never touch our servers

No ads, no tracking, no analytics

One-time payment, lifetime updates

Works on Windows, Mac, and Linux

Email support, answered by the people who built it

About Niconico Downloader

Turn your Niconico favorites into a personal offline library that stays with you. The extension detects available video streams and lets you download them as standard MP4 files with original resolution and audio. Japanese titles and metadata are preserved without character corruption, so your local collection remains easy to navigate.

Once downloaded, you can watch these videos anywhere—during your daily commute, on a long flight, or in areas with unreliable internet. The real-time progress panel shows download speed, file size, and ETA, while automatic retry logic ensures interrupted downloads resume without losing progress.

Privacy is built in: everything runs locally in your browser with your existing Niconico login. No credentials are stored, and no external server ever touches your data. Duplicate detection also skips videos you've already saved, keeping your library clean and efficient.

Trusted at scale

Trusted by 40k+ SERP Apps users.

Private & local

Private downloads. No ads or tracking.

One connected library

Part of the SERP Apps Extensions Library.

How It Works

Download in 3 clear steps

Open the page, let the extension detect what is available, and save the file to your computer.

Open a Niconico video page

Navigate to any video on nicovideo.jp while logged in and let the player load completely.

Click the extension icon

The extension reads the player metadata and presents every available quality option with estimated file sizes.

Choose your resolution and download

Select the quality tier you want and start the download. A progress panel tracks speed and ETA in real time.

Happy Users

Recent customer feedback

Short, practical feedback from people using Niconico Downloader in real workflows.

Finally a reliable way to archive Niconico favorites

I have been watching Niconico since the early Vocaloid days and too many classic uploads have already disappeared. This tool lets me keep personal copies of videos I care about before they vanish. Filenames come through cleanly in Japanese.

Takeshi Moriyama

2025-02-07

Great for offline language study

I study Japanese and use Niconico videos for listening practice. Being able to download them means I can replay tricky sections offline without buffering. The progress panel is clean and responsive.

Elise Thornton

2025-03-12

Fast downloads with smart duplicate detection

Downloads are fast and the duplicate checker saves time when I revisit pages I already archived. Everything stays on my drive with no cloud uploads, which is exactly what I wanted.

Ryota Inoue

2025-01-19

These comments and ratings were collected during our July 2026 customer survey and reviewed against support records before publication.

Features

Everything it does

Core capabilities included in Niconico Downloader.

Designed to detect video streams on Niconico watch pages and list available quality tiers.

Will download videos as standard MP4 files with original resolution and audio.

Planned to preserve Japanese titles and metadata in filenames without character corruption.

Intended to work with standard user uploads and channel-exclusive videos you can access.

Will include a real-time progress panel displaying download speed, file size, and ETA.

Automatic retry logic resumes interrupted downloads without losing progress.

Session-aware authentication uses your existing Niconico login with no credential storage.

Duplicate detection skips videos you have already saved locally.

Runs entirely in your browser with zero external server processing.

Open a Niconico video page: Navigate to a video on nicovideo.jp while logged in and let the player load.

Click the extension icon: The extension reads metadata and presents quality options with file sizes.

Choose your resolution and download: Select a quality tier and start; progress tracks speed and ETA.

Compare

Niconico Downloader Extension vs Online Downloader Website

The extension detects streams as the player loads them, showing quality options directly from the watch page without leaving Niconico.

Niconico Downloader on the watch page