What is the 4K Downloader?
MP3stack lets you save public videos in up to 4K (2160p) MP4 and extract MP3 audio (up to 320 kbps) from top platforms — all in one place, with no app and no login.
4K isn’t just “sharper.” It preserves tiny UI text, code, and diagram details when you pause, zoom, or present on large screens. For creators, 4K gives editing headroom: clean crops/reframes, less aliasing on overlays, and better upscales.
Output always depends on the original upload: resolution, HDR vs SDR, codec (H.264/VP9/AV1), frame rate (30/60fps), and whether a clean stream (no watermark) is exposed by the source.
Use this tool only for your own content or with permission. Please follow each platform’s Terms and local laws.
How to use
- Paste a public video link or type keywords.
- Choose MP4 (video) or MP3 (audio-only).
- Open Preview and pick the highest quality (up to 2160p/60fps when available).
- Select audio bitrate (128/192/256/320 kbps) if offered.
- Click Download to save the file.
If 4K is missing, try 1440p or 1080p — they look excellent on mobile and are far smaller.
What you can convert
- YouTube → 4K MP4/MP3 — up to 2160p/60fps where available.
- Vimeo → 4K MP4/MP3 — creative shorts & docs; availability varies by creator settings.
- Facebook → HD/Full HD — public pages and clips.
- Instagram Reels → MP4/MP3 — mostly HD; true 4K is rare.
- TikTok → MP4/MP3 — high-res vertical video; clean stream when available.
Private, age-restricted, paywalled, or DRM-protected items are not supported.
Why choose MP3stack?
- All-in-one — one simple workflow for major platforms.
- Up to 4K/60fps — choose the highest quality offered by the source.
- Preview first — confirm aspect ratio, sharpness, and audio before saving.
- Flexible quality — audio 64–320 kbps; video 144p–2160p.
- Fast & lightweight — mobile-friendly UI.
- Privacy-aware — no app, no login.
Quick Start Guide
- Paste the video link or search a title.
- Select MP4, open Preview, choose 2160p if shown.
- Pick audio track and frame rate, then Download.
Short on storage? 1080p is a great balance for phones and laptops.
Features & Benefits
- Resolution control — 144p to 2160p (4K), when available.
- Frame rate — up to 60fps for smooth motion (sports/gaming).
- Audio options — MP3 64–320 kbps; smart merge when video/audio are separate.
- Clean metadata — title/thumbnail when exposed by the source.
Use Cases
- Editing & remasters — higher-res sources for cleaner crops and overlays.
- Offline viewing — flights, remote areas, and limited data plans.
- Presentations — pin-sharp playback on TVs and projectors.
- Learning library — tutorials, dev talks, and design demos in high detail.
- Archival/reference — keep important content in the best version available.
Device & Browser Guide
Android: Use Chrome; files appear in Files → Downloads.
iPhone / iPad: Use Safari; check the Files app → Downloads.
Windows / Mac: Chrome/Firefox recommended; Downloads folder.
Smart TV / Tablets: Preview usually works; some TV browsers limit saving.
Quality & Storage Planner
| Format | Quality | Avg Size (4 min) | Best Use |
|---|---|---|---|
| MP4 | 1080p | ~70–140 MB / 5 min | Crisp on phones/laptops |
| MP4 | 1440p (2K) | varies | Sharper on larger screens |
| MP4 | 2160p (4K) | varies (large) | Best detail when available |
| MP3 | 128 kbps | ~4 MB / 3–4 min | Balanced for most tracks |
| MP3 | 192–320 kbps | ~6–9 MB / 3–4 min | Higher fidelity audio |
Popular searches
FAQ
Does every video support 4K?
Can I download 60fps?
Is HDR supported?
Do I get audio with 4K?
Is it legal and safe?
Troubleshooting
- 4K option missing: the source may not provide 2160p. Try 1440p/1080p or a different public link.
- No audio: pick a quality that includes audio, or let the tool merge audio/video in Preview.
- Slow or timeout: large 4K files need stable Wi-Fi; try a lower resolution for faster downloads.
- Watermark visible: some sources don’t expose a clean 4K stream; try another public URL of the same video.
- Download didn’t start: allow pop-ups; click the final Download button to begin.
Copyright & compliance
All trademarks & logos belong to their owners. MP3stack does not permanently store files; items are generated on demand from public sources.
⚠ Attention:
By using this service you agree to our Terms of Service.
Use it only for content you own rights to or that is free-licensed.