Narcis
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Upscale toward 4K — up to 4× larger, AI-reconstructed detail.
Looking for a "4K" upscale? This tool goes up to 4× your original size with reconstructed detail — the honest ceiling is around 2048×2048 px, not a true 4K frame from any input.
How it works
- 1Upload a small image
Up to 512×512 px input — crop or resize larger photos first.
- 2Scale is set to 4×
The maximum scale factor available, reconstructing detail rather than stretching pixels. Output tops out around 2048×2048 px.
- 3Download your upscaled photo
Direct download, no watermark.
What you get
- 2× or 4× upscaling with AI — not blurry bilinear stretch
- Sharp edges, fine texture recovery, and face detail
- Best for thumbnails, icons, cropped portraits, and scanned art
- Accepts images up to 512×512 px
- Free, no account required
Frequently asked questions
- Will this give me a true 4K image?
- No — true 4K is 3840×2160 px or larger. This tool upscales up to 4× the input, capped at roughly 2048×2048 px since input is limited to 512×512 px. It gets you meaningfully larger and sharper, not a literal 4K frame.
- What is the largest input I can upload?
- 512×512 px. Crop or resize larger photos before uploading.
- Is it free?
- Free, no account, no watermark. Download the result directly.