4K YouTube to MP3 is an ultimate converter with a built-in player and browser that helps you convert YouTube videos to MP3 in no time. YouTube is not the only site supported, though. With 4K YouTube to MP3, you can save audiobooks and audio from Bilibili, SoundCloud, Facebook, Niconico, Vimeo, and a number of other platforms.

Its robust functionality allows you to download single videos, download multiple audio tracks simultaneously, and save audio tracks from YouTube playlists and channels.

All this you can do using the free version of the software, but the PRO license unlocks the magic word ‘unlimited’ before these. And a few more things.

So here’s why you want to upgrade the 4K YouTube to MP3 PRO.

4K YouTube to MP3 PRO License Benefits

After the upgrade, you’ll get:

• Limitless single videos download

• Unlimited videos per playlists and channels download

• Unlimited simultaneous downloads

• Unlimited private YouTube content download

• URLs import and export

• YouTube Premium HQ audio

• Ad-free experience

• Easy proxy setup

How to Upgrade to 4K YouTube to MP3 PRO

You can upgrade within 4K YouTube to MP3 through the Tools → Manage License path.

1. Launch the application on your desktop.

2. Find Tools, then Manage License.

3. On a new window, click on Upgrade to Pro.

4. Fill out the checkout form and wait for an activation key to be emailed to you.

Alternatively, you can upgrade within a website.

Or follow this link, then take the steps below:

1. Open the page and find the app you want to upgrade.

2. Click Select your license under the app’s name.

3. Find a Pro license and click on Buy Now.

4. Fill out the information in the checkout form and complete the purchase. You can pay by a credit card or PayPal. The fee is one-time.

Just in case you’re wondering:

• You have the right to return license purchases made online within 14 days for a full refund.

• One license key can be activated an unlimited number of times on three computers.

• 4K Download license keys don’t have an expiration date, they last lifetime on up to 3 computers.

• After activating one license 3 times, you will have to acquire a new license key in order to activate on other computers.

• Contact our support team in case you’re facing any issues, have any ideas or doubts at support@4kdownload.com.

Upgrade your license today to unlock all features of 4K YouTube to MP3 and enjoy its full capacity!