There is no app to install. The converter runs in the browser you already have — Safari on iPhone and iPad, Chrome on Android — and the finished file saves through your phone’s normal download mechanism. The only genuinely fiddly part is getting the link out of the YouTube app, so that is where this starts.
Step 1 — copy the link from the YouTube app
Open the video, tap Share under the player, then tap Copy link. You will get a short link that looks like https://youtu.be/…. That works perfectly — the converter resolves short links, Shorts links and full watch links to the same video.
If you are watching in a mobile browser instead of the app, the address bar link works just as well. Tap the bar, then Copy.
Only convert videos you uploaded yourself, that carry a permissive licence, or that the rights holder has cleared for offline use. Private and members-only videos will return an authorization error rather than a file.
Step 2 — open the converter and paste
Go to the YouTube to MP4 converter in your browser. Tap the Paste button inside the URL field rather than long-pressing — it pulls straight from the clipboard in one tap.
iOS will ask for permission the first time (“Allow Paste?”). Tap Allow. If you would rather not grant it, long-press the field and choose Paste as normal; both routes end in the same place.
After a second or two the video title, channel and length appear, along with the qualities that source actually offers.
Step 3 — choose a quality that suits a phone
On a phone screen, 480p or 720p is usually the right answer. The difference between 720p and 1080p is hard to see on a six-inch display, and the 1080p file is nearly twice the size — which matters if you are on mobile data or a nearly full phone.
- Tight on data — 360p, roughly 4 MB per minute.
- Normal viewing — 720p, roughly 12 MB per minute.
- Will move it to a laptop or TV later — 1080p or higher.
On mobile the converter hides qualities the source cannot provide, so anything you can see is genuinely available. The full breakdown is in our guide to YouTube video quality.
Step 4 — convert, then download
Tap Convert to MP4 and leave the tab open. The progress bar reflects real server progress rather than a timer, so it is telling you something true. When it finishes, tap Download MP4.
Keep the screen on while it downloads. Both iOS and Android will suspend a background tab aggressively, and a suspended tab can interrupt the transfer.
Where the file ends up
On iPhone and iPad
Safari saves downloads to the Files app, under On My iPhone → Downloads by default. You can also reach it from the download arrow that appears next to the address bar. From Files you can move it into Photos, share it to another app, or AirDrop it to a Mac.
If you want it in your camera roll: open the file in Files, tap the share icon, then Save Video.
On Android
Chrome saves to the Downloads folder, reachable from Chrome’s menu → Downloads, or through your Files/My Files app. Most gallery apps pick up video files from Downloads automatically; if yours does not, move the file into the Movies folder.
Common mobile snags
| What happens | Why | Fix |
|---|---|---|
| The Paste button does nothing | Clipboard permission was declined | Long-press the field and paste manually |
| Download stops partway | The browser tab was suspended in the background | Keep the tab in the foreground and the screen awake |
| “This download link has expired” | Links are single-use and last 30 minutes | Convert again for a fresh link |
| Fewer quality options than on desktop | Unavailable qualities are hidden rather than greyed out on small screens | Nothing to fix — the source does not offer them |
| Only need the audio | Video is 10–20× larger than the sound alone | Switch to MP3 |
A note on storage
Phones fill up fast. A single 4K download can be most of a gigabyte, and phone storage is the expensive kind. If you are archiving rather than watching, converting at 720p and keeping the original upload as your master is usually the better trade.
Next steps
The step-by-step guide covers the flow in more depth including every message the tool can show, MP4 vs MP3 helps with the format choice, and the FAQ answers the questions that come up most.