YouTube video downloader
Save YouTube videos and Shorts in resolutions up to 4K, or convert to MP3 for audio. Paste a link and choose your quality.
for personal use · terms
how to download from YouTube
- Copy the YouTube link. Tap Share under the video or Short and choose Copy link, or copy the URL straight from your browser address bar.
- Paste it in. Drop the link on fastsaver.io — full watch URLs, youtu.be short links, and Shorts links are all treated the same way.
- Pick a quality or flip to MP3. Choose a resolution from the quality picker — typically 720p, 1080p, or 4K, depending on what the source offers. Want just the sound? Switch on the audio-only toggle for an MP3.
- Download your pick. FastSaver prepares the exact format you chose and streams it to you. A 4K file takes a moment longer than 720p — the size shown on each option tells you what to expect.
what you get from YouTube
| Video | an MP4 at the resolution you choose — 480p to 1080p on most uploads, 2K and 4K when the source provides them. |
|---|---|
| Audio | the soundtrack on its own as a compact audio file — MP3 or M4A, depending on the source stream. |
| Shorts | the vertical video as an MP4, through the same quality picker as regular links. |
| File sizes | shown per quality before you download anything, so you can pick 720p when 4K is overkill. |
why fastsaver
- Quality up to 4K
- Pick the resolution you want before downloading — FastSaver lists every quality the source video offers, up to 4K.
- No login, no app
- No account, no browser extension, no desktop converter to install — the whole flow runs on fastsaver.io.
- Video or MP3
- One toggle switches between saving the full video and grabbing just the audio as an MP3.
- Sizes shown up front
- Every quality option lists its file size before you commit, so a 4K download never ambushes your storage or data plan.
YouTube hosts everything from full-length tutorials to fifteen-second Shorts, and FastSaver handles both. Paste any public video or Shorts link and you get a quality picker showing exactly what the source offers — usually 720p, 1080p, and sometimes 4K — so you can balance file size against sharpness before you commit. The picker highlights 1080p when it is available, the sweet spot between sharpness and size for most screens, and each option shows its file size next to the resolution. If you only need the sound, the audio-only toggle skips the video entirely. Our step-by-step guides cover the details: see how to download YouTube videos and how to convert YouTube to MP3.
Shorts work exactly the same way as regular videos — copy the share link, paste, download. Since Shorts are vertical and often watched on phones, it helps that FastSaver runs entirely in your mobile browser with no app to install; the walkthrough in how to download YouTube Shorts shows the whole flow on iPhone and Android. Note that private videos, live streams, and playlists are not supported — FastSaver works with one public video at a time.
Keep it fair: save your own uploads, Creative Commons material, or videos whose owner has given you the nod, and respect creators and YouTube's terms of service. If you also save clips from other platforms, FastSaver covers TikTok, Instagram, Facebook, X, and Pinterest with the same paste-and-download flow.
YouTube downloader — frequently asked
What resolutions can I download?
Whatever the source offers — typically 720p, 1080p, and up to 4K when available.
Can I download YouTube as MP3?
Yes. Switch on audio-only and you’ll get an MP3 instead of a video file.
Do YouTube Shorts work?
Yes — Shorts links are supported the same way as regular videos.
Is this legal?
FastSaver is for downloading content you own or are permitted to save, for personal use. Respect creators’ rights and YouTube’s terms.
Can I download an entire YouTube playlist or channel at once?
No — FastSaver takes a single video link at a time; playlists, channels, and batch queues are not supported. To save several videos, run each link through separately.
How do I know how big the download will be?
Each option in the quality picker shows its file size next to the resolution before you commit. As a rough guide, a ten-minute video runs to tens of megabytes at 720p and can reach several hundred megabytes — or more — at 4K, so check the number if storage or mobile data is tight.
Does FastSaver add a watermark or logo to downloaded YouTube videos?
No. FastSaver never adds watermark overlays, logos, or branding to your files. The video downloads exactly as the source provides it, with a sensible filename.
Can I download a YouTube live stream while it is still live?
No — live streams are not supported. FastSaver also cannot access private or removed videos. It works with regular public videos and Shorts.
guides
who runs this
FastSaver is a one-person project with no ads and no tracking — it runs on donations. The same downloader is available as a Telegram bot and a developer API. Questions or takedowns: about & contact.