AceThinker MP3Juice Downloader: How to Download MP3

By Reena Bansal

Updated Oct 7, 2026Published Jan 18, 202210 min read

Note (October 2026): AceThinker’s free online downloader is no longer unlimited – it now allows 5 files a day from 20 sites at 128 kbps – and Music Keeper is no longer listed; the company’s current desktop music downloader is Aqua Tune.

AceThinker MP3Juice Downloader is a free browser-based tool from AceThinker that saves audio from supported sites as MP3 files. As of October 2026 it lives at AceThinker’s MP3 Downloader Online page, and the free version is limited to 5 files a day, 30-minute clips, 128 kbps audio and 20 supported sites; the paid desktop app, Aqua Tune, removes those limits.

Music is part of daily life for most people. Many listen to music to improve their mood, pass the time, or enjoy ourselves. Also, people have various reactions to different types of music, depending on whether they like the beat or the lyrics.

Many services let people stream music, such as Spotify or YouTube. However, streaming normally requires an internet connection to play music. For offline listening, people either use a streaming service’s built-in download feature, buy downloadable files, or use a third-party downloader such as the AceThinker tools described below.

Several third-party music downloaders exist. This guide walks through two from the software company AceThinker, then covers their current limits, the legal position and lawful alternatives.

Methods to Download Music Online

MP3Juice downloader and Music Keeper from AceThinker are two tools from the same company for saving audio for offline listening. The steps below show how each one worked when this guide was first written; the interfaces have been updated since.

Method 1: Download Music using MP3Juice Downloader

Supported System: Windows 10/8.1/8/7,  Mac OS X, macOS or later.

Supported Format: MP3 (audio format) and MP4 (video format).

With AceThinker MP3Juice Downloader, users paste a link or type a search term in the browser, with no registration or installation. As of October 2026, AceThinker’s page describes the free online version as limited to 5 files per day, clips of up to 30 minutes, 128 kbps audio and 720p video.

This online downloader lets the user download music by copying and pasting the URL. And it includes a “Smart Search Engine,” allowing users to quickly discover the music they want by simply inputting a related term regarding the song, such as the title, artist, or album name.

When this guide was first published, the service was described as supporting over 250 sites, including YouTube, Audiomack, Jamendo and SoundCloud. As of October 2026, AceThinker lists the free online app as supporting 20 sites, with support for 1,000+ sites reserved for its paid desktop software. The walkthrough below shows how the online tool is used.

Step 1: Access the Online Music Downloader

Open your web browser and go to AceThinker’s page for MP3Juice Downloader. The tool runs in common browsers such as Chrome, Firefox, Safari and Opera. As of October 2026, the old MP3Juice Downloader address redirects to AceThinker’s MP3 Downloader Online page on the company’s newer acethinker.ai domain.

Step 2: Search for the Music

Next, search for the music you need to download. You can enter the link or title of the video that contains the music you need on the “Search Tab” of the tool. Then click the “Download” icon beside the “Search Tab” of the tool. The tool will analyze the link or keyword you have inputted, showing the result.

Step 3: Download the Music

Once the tool has shown the result, clicking the drop-down “Download” button beside the video will let you access the format and quality. Under the “Audio” panel, you can view the available quality for your audio.

Click on the “Download” button, and a small window will appear. Tick the “Save File” and the small box beneath it. Finally, click the “OK” button to save the music on your computer.

Step 4: Play the Downloaded Music

The downloaded file will be shown on the upper part of your web browser. Then double-clicking the audio file will play automatically on your default media player. Now you can enjoy your favorite music without any interruption.

Pro’s:

• It originally let users download audio files without a stated limit; as of October 2026, the free version is capped at 5 files per day.
• The tool’s search engine has a comprehensive result so users can have more choices.
• AceThinker describes the downloader page as ad-free, although the page promotes the company’s paid desktop software.
• The site was offered in several languages, such as Japanese and Portuguese, when this guide was written.

Con’s:

• The only available audio file format is MP3.

Method 2: Download Music with Music Keeper

Supported System: Windows 10/8.1/8/7, macOS 10.14 or later.

Supported Format: MP3 (audio format) and MP4 (video format)

AceThinker Music Keeper was a desktop music downloader for Windows and Mac that saved MP3 songs from many online sources for offline listening, with a simple interface aimed at new users. As of October 2026, the Music Keeper name no longer appears on AceThinker’s site: the old link opens the company’s online music downloader page, and its current desktop music downloader is sold as Aqua Tune.

Music Keeper could also save music videos in MP4 format, and AceThinker said the program used multi-threaded downloading to speed up transfers. The steps below show how Music Keeper worked when this guide was written.

Step 1: Download and Install the Music Downloader

Music Keeper was offered for both Windows and Mac. On the original download page for Music Keeper and click on the “Free Download” button to save it to your computer. Wait until the download process is done and finish all the installation prompts. Once done, you can access the interface of the tool.

Step 2: Copy and Paste the URL

Search for the video you want to download, and on the address bar, copy the URL. Go back to the Music Keeper and paste the video URL on the “Search Tab,” or you can simply click the “Paste URL” button. Wait until the tool finishes analyzing the link.

Step 3: Download the MP3

After that, click on the drop-down “Download” button for you to access the quality format of the video. Choose your preferred quality for your MP3 file and tick the small circle beside it. Then, hit the “Download” button to download the song on your computer.

Step 4: Play the MP3

When the downloading process is finished, click on the “Downloaded” panel to view the audio file. Right-click on it and choose “Play” to listen to the MP3 using the built-in media player of the tool. You can also organize your library by creating a playlist or opening them on the output folder.

Pro’s:

• It offered audio quality from 128 kbps to 320 kbps; AceThinker’s current desktop downloader, Aqua Tune, also lists audio of up to 320 kbps.
• Users can take advantage of its built-in media player.
• The tool allows its users to download in bulk or download an entire playlist.
• Aside from audio files, users can download high-quality videos up to 1080p.

Con’s:

• This software was not available on mobile devices; Aqua Tune is likewise listed for Windows 11/10/8/7 and macOS 10.13 or later only.

Conclusion

Both AceThinker tools are straightforward MP3 downloaders. Besides YouTube music videos, they work with other sites such as Vimeo, Audiomack and SoundCloud, although YouTube’s Terms of Service forbid downloading content unless YouTube expressly allows it or YouTube and the rights holders give written permission.

MP3Juice downloader and Music Keeper are easy to use, and AceThinker describes its downloader pages as ad-free. Download speed depends on your connection and the source site, and the safest course is to save only music you own, royalty-free tracks, or content the rights holder lets you download.

What Has Changed With AceThinker’s Music Downloaders?

AceThinker’s downloaders have moved from the acethinker.com domain to acethinker.ai, and the free tools now carry clear usage caps. The table below summarizes what AceThinker’s own pages listed in October 2026.

As of October 2026, AceThinker’s page showed promotional prices for Aqua Tune of $9.95 for one month, $19.95 for one year and $39.95 for a lifetime personal license, against listed regular prices of $19.95, $49.95 and $69.95. Software prices change often, so check the current price before buying.

What Is Aqua Tune?

Aqua Tune is AceThinker’s desktop MP3 music downloader. According to AceThinker, Aqua Tune searches by URL or by keywords such as song title, artist or album, downloads audio at up to 320 kbps, includes playlist creation, metadata editing and a built-in player, and lists sites such as YouTube, Vimeo, Dailymotion, Audiomack, Bandcamp, Jamendo, SoundCloud and Mixcloud.

Is It Legal to Download Music With an MP3 Downloader?

Downloading music with an MP3 downloader is only clearly allowed when the site or the rights holder permits it. YouTube’s Terms of Service state that users may not access, reproduce or download any content except as expressly authorized by the service, or with prior written permission from YouTube and, where applicable, the rights holders.

Copyright law varies by country, and a tool being available does not make every use lawful. Music released under a free license, tracks you have bought as downloads, and content the artist offers for download are the low-risk cases. For background on how rights in recorded music work, see this guide to what music licensing is and why it matters.

Legal Ways to Download Music for Offline Listening

Several mainstream services include offline listening within their own rules:

• Spotify Premium: According to Spotify Support, Premium users can download albums, playlists and podcasts, up to 10,000 tracks on each of up to 5 devices, and must go online at least once every 30 days to keep downloads. Free users can download podcasts only.
• YouTube Music Premium: According to YouTube Music Help, Premium members can download songs, videos and podcasts to a mobile device and must reconnect at least once every 30 days to keep them.
• Bandcamp: Bandcamp sells downloads directly from artists in formats including MP3 (320k or V0), AAC, Ogg Vorbis, FLAC, ALAC, WAV and AIFF, so the files are yours to keep.
• Jamendo: Jamendo, part of the Winamp Group, is a free streaming service for personal use built around independent artists, with paid licensing for commercial use.

To compare the main streaming apps, see this overview of popular music streaming apps, and for background on how the largest service changed the business, read how Spotify reinvented the music industry.

Which MP3 Bitrate Should You Choose?

MP3 bitrate sets both sound quality and file size. A 128 kbps MP3 uses about 0.96 MB per minute of audio (128,000 bits x 60 seconds / 8), so a 4-minute song is roughly 3.8 MB. A 320 kbps MP3 uses about 2.4 MB per minute, so the same song is roughly 9.6 MB.

Converting a 128 kbps file to 320 kbps does not restore lost detail; quality is capped by the source file.

How to Use Any Online Downloader More Safely

1. Type the vendor’s address yourself rather than clicking ads or pop-ups that imitate download buttons.
2. Install desktop software only from the developer’s own site, and scan installers with your security software.
3. Decline browser notification prompts and extra software offered during installation.
4. Check the free version’s limits before paying; AceThinker advertises a 30-day money-back guarantee for Aqua Tune.
5. Save only content you have the right to keep.

If you want to record audio you are allowed to capture rather than download it, this roundup of streaming audio recorders covers that approach, and this guide explains how to download music from SoundCloud where the uploader allows it.

Written byReena Bansal

Reena Bansal is a skilled and adaptable content writer who can breathe life into any topic. With a keen eye for detail and a passion for storytelling, she creates well-researched, engaging, and easy-to-understand content across various niches, from technology and business to health, lifestyle, and more. Her writing isn’t just about sharing information-it’s about making complex ideas simple, keeping readers engaged, and delivering content that truly resonates. If you need content that is clear, compelling, and impactful, Reena Bansal is the writer to trust!

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