Is UpscaleFast free to use?

Yes! UpscaleFast offers 3 free AI upscales per day with no sign-up required. Create a free account to get 5 bonus credits.

What image formats are supported?

UpscaleFast supports JPG, PNG, and WebP images up to 4 MB in size.

How does AI image upscaling work?

UpscaleFast uses Real-ESRGAN, a state-of-the-art AI super-resolution model, to intelligently add detail and enhance resolution by 2x, 3x, or 4x while preserving natural textures and sharp edges.

Are my images private and secure?

Yes. All uploaded images are automatically deleted within 24 hours. Your data is never shared with third parties.

Can I use upscaled images for commercial purposes?

Absolutely. There are no watermarks or restrictions. Upscaled images can be used freely for both personal and commercial projects.

Anime & Digital Art · Free Online

Free AI Anime Upscaler — Upscale Anime to 4K

Upscale anime images, manga scans, illustrations, and digital art to 2x or 4x resolution with AI. Real-ESRGAN preserves crisp line art, flat colors, and smooth gradients — no blurring, no artifacts, no haloing.

Optimized for anime art

No watermark

Better than Waifu2x

Anime Upscaling Results

See how AI upscaling preserves clean lines and vibrant colors in anime artwork. Drag the slider to compare the original and 4x upscaled versions.

Anime artwork upscaled 4x with AI — sharp lines and clean colors

Low resolution anime artwork before AI upscaling

BeforeAfter

What Can You Upscale?

Our AI handles all types of anime and digital art

Anime Screenshots

Upscale screenshots from anime episodes, OVAs, and movies to wallpaper-quality 4K resolution.

Manga Scans

Enhance manga panel scans for reading on high-DPI displays or printing at larger sizes.

Digital Illustrations

Scale up fan art, concept art, and original illustrations for prints, posters, and merchandise.

Game Assets

Upscale game sprites, pixel art, visual novel backgrounds, and character portraits for HD remasters.

Tips for Best Anime Upscaling Results

Use PNG, Not JPEG

JPEG compression creates blocky artifacts around line art that get amplified during upscaling. Always use PNG input for the cleanest anime upscaling results.

Start with the Best Source

Find the highest quality version of the image available. A clean 720p source will produce a better 4K result than a compressed 1080p source with artifacts.

4x Works Great for Anime

Anime art with its flat colors and clean lines upscales cleanly at 4x. Unlike photos, where 2x is sometimes safer, anime artwork handles higher upscale ratios without visible artifacts.

Check Edge Quality

After upscaling, zoom in on line art edges. Look for haloing (light/dark fringes) or jagged lines. These indicate the source image had pre-existing compression artifacts.

Learn more: How to Upscale Anime Artwork Without Artifacts · What is Real-ESRGAN?

Anime Upscaler — FAQ

1. What is an anime upscaler?

An anime upscaler is an AI tool designed to increase the resolution of anime images, manga scans, and digital illustrations while preserving the unique characteristics of anime art — clean line art, flat color areas, and smooth gradients.

2. How is this different from Waifu2x?

UpscaleFast uses Real-ESRGAN which produces sharper results with fewer artifacts than Waifu2x. Real-ESRGAN was trained on a much larger and more diverse dataset, handles both anime and photographic content, and supports up to 4x upscaling natively.

3. What image types work best?

Anime screenshots, manga panels, digital illustrations, pixel art, game sprites, visual novel CGs, and fan art all work great. Use PNG format for input to avoid JPEG compression artifacts.

4. Can I upscale manga scans to print quality?

Yes. Upscaling manga scans at 4x can bring them to 300 DPI print quality for most page sizes. For best results, start with the highest quality scan available and use PNG format.

5. Is the anime upscaler free?

Yes. UpscaleFast offers 3 free anime upscales per day with no account required. No watermarks on results.