How to Convert YouTube to MP3 Legally (And What Most Tools Don't Tell You)

Most "YouTube to MP3" tools you'll find online violate YouTube's Terms of Service. Some also violate copyright law, depending on what you're downloading and where you live. The sites that rank for this query rarely tell you that — they just give you a text box and a Download button.

This guide does the opposite. Here's what's actually legal, what isn't, and how to get YouTube audio as MP3 without breaking the rules.

The Short Answer

There are three legitimate paths to MP3 audio from YouTube content:

1. YouTube Premium's offline feature + audio-only mode. Works for any YouTube video. Files stay inside the YouTube app, not exportable — but they play offline, which is often the actual goal. 2. Creative Commons licensed videos. These are explicitly marked "CC BY" on YouTube and can be legally downloaded and redistributed. Different rules, different tools. 3. Your own content, or content you own rights to. YouTube Studio lets you download your uploads in MP4. Convert the audio with MP4 to MP3.

Everything else — third-party downloaders, "ytmp3" sites, browser extensions that scrape youtube.com — violates YouTube's Terms of Service (Section 5, "Permissions and Restrictions"). Some are also illegal under copyright law in the US and EU.

What YouTube's Terms Actually Say

YouTube's Terms of Service explicitly prohibit:

> "accessing, reproducing, downloading, distributing, transmitting, broadcasting, displaying, selling, licensing, altering, modifying or otherwise using any part of the Service or any Content except: (a) as expressly authorized by the Service; or (b) with prior written permission from YouTube and, if applicable, the respective rights holders;"

The exception is YouTube Premium's offline mode, which is "expressly authorized by the Service." Everything else requires permission from YouTube and — if the content isn't yours — from the creator.

Path 1: YouTube Premium (The Fully Legitimate Option)

YouTube Premium includes offline downloads and audio-only mode. Since May 2023, audio-only playback is a standard Premium feature.

How it works:

1. Subscribe to YouTube Premium ($13.99/month as of 2026, family plans available). 2. Open any video in the YouTube app. 3. Tap Download. Select Audio quality level. 4. The audio downloads inside the YouTube app and plays offline.

The files are not exportable as MP3. You can't transfer them to another app or device. For most use cases — listening during commutes, on planes, in areas with poor signal — this is fine, and it's the option YouTube explicitly supports.

Path 2: Creative Commons Videos

YouTube has millions of videos licensed under Creative Commons Attribution (CC BY). These can be legally downloaded, shared, and even used commercially, as long as you credit the creator.

To find them:

1. Search on YouTube normally. 2. Click Filters → Features → Creative Commons. 3. Or search directly for the license terms: "creative commons" audio tutorial.

Once you've found a CC-licensed video, you can legally download it using tools like yt-dlp (command-line) or the official YouTube download option when the creator has enabled it. Convert to MP3 with any audio converter. Include attribution when you reuse the content.

This is the path used by podcasters who need royalty-free music, educators building course material, and video creators sourcing clips for fair use.

Path 3: Your Own Content

If you uploaded the video, you can download the original file from YouTube Studio:

1. Go to studio.youtube.com. 2. Click your video. 3. More options → Download. 4. You get the original MP4 (or whatever format you uploaded). 5. Convert the audio with MP4 to MP3.

This works regardless of whether the video is public, unlisted, or private. It's your content.

The same applies if you have explicit written permission from the creator. Email screenshots showing they authorized you to use their audio are worth saving.

What About "Fair Use"?

Fair use (US) and fair dealing (UK) allow limited use of copyrighted material for purposes like criticism, commentary, news reporting, teaching, and research — but fair use is a legal defense, not a license. It doesn't override YouTube's Terms of Service. You can potentially win a copyright case under fair use after being sued, but that doesn't stop YouTube from terminating your account or restricting your access for violating the ToS.

If you're doing commentary on a video (reaction content, film criticism, academic analysis), the safer legal path is:

1. Don't extract the audio via third-party tools. 2. Embed the original YouTube video in your content. 3. Quote short excerpts under fair use when you legitimately need the audio.

What About YouTube Music?

YouTube Music is a separate service. Premium subscribers can download tracks for offline listening inside the YouTube Music app. Like Premium video downloads, these aren't exportable as MP3 files — they stay in the app.

If you want portable MP3 files of songs, buy them from a service that sells MP3s (Bandcamp, 7digital, Amazon Music store) or subscribe to a service that offers native MP3 downloads.

What About Archiving a Video I Bought?

If you purchased a YouTube movie or show, it's licensed for playback in YouTube's apps — not ownership of a file. Extracting and saving the audio or video is outside the license terms, regardless of whether you paid.

Tools That Ask You to Paste a YouTube URL

Any tool that takes a YouTube URL and hands you back an audio file is doing one of these:

1. Scraping youtube.com content — violates YouTube ToS 2. Using the YouTube Data API in ways the API doesn't support — also violates the API terms 3. Acting as a proxy for option 1 or 2

Their legal status doesn't change based on whether they host ads or are called "free." YouTube has sued and taken down several large operators (youtube-mp3.org, among others).

This tool doesn't accept YouTube URLs and never will. It converts audio files you already have — legitimately obtained — from one format to another.

After You've Legitimately Obtained the Audio

Once you've downloaded content through Path 1, 2, or 3 above, you may end up with files in formats your phone or editing tool doesn't love. That's where audio format conversion comes in:

MP4 or MOV video file from YouTube Studio → use MP4 to MP3 or MOV to MP3 to extract the audio.
Downloaded WAV master from Creator Music licensing → use WAV to MP3 for portable playback.
M4A from Premium offline cache export (where allowed) → use M4A to MP3 for broader compatibility.

All conversions run in your browser. Your files never leave your device.

The Honest Recommendation

For most people searching "how to convert YouTube to MP3 legally":

If you just want offline listening, pay for YouTube Premium. It's what it's for.
If you need actual MP3 files for audio work, license content through Creator Music or use Creative Commons sources.
If you created the content yourself, download from Studio and convert.
Don't use third-party YouTube scraper sites. They're illegal, they put malware in your downloads, and they're one DMCA notice from disappearing.

Legal doesn't have to mean complicated. Premium is $14 and covers 99% of the "I want to listen offline" use case.

How to Extract Audio from Video — general technique for video-to-audio conversion
What Is MP3? — background on the format
Best Format for Podcasts — if you're building a podcast from legally-obtained audio