You want to extract the background music from a Niconico video. How to convert Niconico to MP3? This post tells you how to download Niconico in MP3 format and how to convert the downloaded Niconico video to MP3 (with MiniTool Video Converter).

Niconico is a Japanese video hosting website, which offers a variety of anime series, music videos, game videos, etc. Wondering how to download MP3 audio from Niconico? Here are two methods to convert Niconico to MP3.

Download Niconico to MP3

The first method is to use a Niconico downloader to download Niconico in MP3 format. Here’re are two free Niconico to MP3 downloaders for you.


Online-Convert is an online converter for video and audio conversions. You can upload a video from your computer or by entering URL and convert it into MP3, AAC, FLAC, M4A, M4R, MMF, OGG, WAV, and WMA.

Here’s how to convert Niconico to MP3.

Step 1. Enter the Online-Convert website in the web browser.

Step 2. Select the Convert to MP3 option in the Audio converter tab.

Step 3. Copy the URL of the Niconico video you like.

Step 4. Click on Enter URL and paste the copied link in the box. Then click the Add URL button.

Step 5. Press the Start conversion button to convert Niconico video to MP3.

Video DownloadHelper

If Online-Convert doesn’t work, you can use a Niconico downloader – Video DownloadHelper. Besides downloading Niconico audio, this tool can download and convert streaming videos to MP3, MP4, AVI, WMV, etc.

Here’s how to download MP3 from Niconico.

Step 1. Find Video DownloadHelper in the Chrome web store.

Step 2. Download and install the extension.

Step 3. Go to Niconico and play the video that you want to extract MP3 from.

Step 4. Click the extension icon. From the popup window, click the three dots.

Step 5. Then select Download & Convert and choose MP3 as the output format.

Step 6. Save the MP3 file from Niconico.

Convert Downloaded Niconico Videos to MP3

Another method is to use an MP3 converter to convert downloaded Niconico videos to MP3. Here recommend MiniTool Video Converter and Online Converter.

MiniTool Video Converter

MiniTool Video Converter supports the most popular formats. It can convert downloaded Niconico videos to MP3, WMA, AAC, OGG, and more. It’s also capable of downloading YouTube videos and recording computer screen.

Here’s a quick guide.

Step 1. Download and install MiniTool Video Converter.

Free Download

Step 2. Click on Add Files to import the Niconico video you’ve downloaded before.

add Niconico video to MiniTool Video Converter

Step 3. Tap on Convert all files to and select MP3 in the Audio tab.

Step 4. Click on Convert to convert Niconico video to MP3.

Online Converter

After downloading Niconico videos, you can use Online Converter to convert them to MP3. Online Converter is an online audio conversion service, which can extract MP3 from Niconico video. The max file size is 200MB.

Here’s how:

Step 1. Visit the Online Converter website.

Step 2. Navigate to Audio Converter > MP3 Converter.

Step 3. Select the Video to MP3 option from the Convert box and upload the downloaded Niconico video.

Step 4. Click on Convert to start the Niconico to MP3 conversion.

Also read: 4 Best Viki Downloader to Downloader Viki Videos for Free


Now, you can try these Niconico to MP3 converters to convert your favorite Niconico video to MP3 for free!

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