AI anime upscaler · Real-ESRGAN
AI anime upscaler — clean lines, no blur
Fan art, screenshots, manga pages, stickers and AI anime renders, enlarged without soft, grey outlines. Real-ESRGAN keeps line art crisp and flat colours flat.
- Clean line art
- Manga & screentone
- Up to 8K
- PNG, no watermark
Updated by the Kenerate AI team
On this page
Quick answer
What is an AI anime upscaler?
An AI anime upscaler is a tool that enlarges anime art, manga pages, stickers and AI anime renders without blurring the line art. Kenerate AI's default Real-ESRGAN engine keeps clean outlines and flat colours, and Image Upscaler outputs an exact 4K or 8K. In our tests a 256 px chibi sticker came out at 2048 px.
Key facts
- Engines
- Real-ESRGAN (default) · Image Upscaler for 4K/8K
- Watermark
- None
- Max size
- 8K or 128 MP
- Best format
- PNG for line art
How it works
How to upscale an anime image
Three steps. Real-ESRGAN is already selected when you open the tool from this page.
- Time needed
- Steps
- 3 steps
Step 1
Add the anime image
Upload fan art, a screenshot, a manga page, a sticker or an AI anime render — JPG, PNG or WEBP up to 25 MB.
Step 2
Keep Real-ESRGAN selected
It is the default engine and keeps clean line art and flat colours. For a fixed 4K or 8K size, pick Image Upscaler.
Step 3
Download a PNG
Compare the lines at 100% and download — PNG keeps flat colours and outlines crisp. No watermark.
See it in the app
Open Image Upscaler and upload a photo, or pick one from your library or a link.
Watch the tour · 1:47
7 engines, 2K · 4K · 8K & exact size, portraits, old-photo restore, before/after & chat
Chapters
Real results
What anime art can it upscale?
Real Real-ESRGAN outputs from small inputs. Tap one to try the same image.
- Before · 300 pxAfter · 1832 × 2290
Illustrations & fan art
300 px to 1832 × 2290 — hair, scarf and skyline stay sharp.
Real-ESRGAN
Try this photo 
Before · 320 pxAfter · 1832 × 2290
Before · 256 pxAfter · 2048 px
Before · 512 px renderAfter · 4K · 5461 × 3072
At 100%
Anime upscaled vs stretched, zoomed in
Look at the outlines: a normal resize makes them soft and grey; the upscale keeps them dark and sharp.
Zoom into a manga panel
A 320 px manga panel after Real-ESRGAN. Move over it to check the ink lines and the cherry blossoms.
- Ink outlines stay solid black
- Screentone shading stays even
- No colour fringes in a black-and-white page
Better results
Tips for upscaling anime and manga
- Start from the biggest copy you have. The original PNG beats a resized, re-compressed repost.
- Download PNG. Flat colours and outlines show JPEG blocks easily.
- Stay faithful for character art. Real-ESRGAN and Image Upscaler don't redraw; creative engines can drift off-model.
- Need a transparent sticker? Upscale first, then run the background remover.
- Coming from waifu2x? See waifu2x alternative for how the two compare.
Engines
Which engine should you use for 4K anime?
Real-ESRGAN is the right engine for most anime; the others are there for exact sizes.
Open source
Real-ESRGAN
- Style
- Faithful
- Speed
- About 25 s
- Output
- 2048 px
Open Real-ESRGANBest for
Quick clean-ups of small AI renders, web images and product shots (under 2048 px).
WaveSpeed
Image Upscaler
- Style
- Faithful
- Speed
- About 45 s
- Output
- 2K · 4K · 8K
- Size
- 2048+ px, 4096+ px, 8192+ px
Open Image UpscalerBest for
Everyday photos and AI art to a standard 2K, 4K or 8K size.
Kenerate AI
Kenerate Upscale
- Style
- Faithful
- Speed
- About 14 s
- Output
- Up to 128 MP
Open Kenerate UpscaleBest for
E-commerce and design assets at a precise size, fast.
WaveSpeed
Ultimate Upscaler
- Style
- Faithful
- Speed
- About 19 s
- Output
- 2K · 4K · 8K
- Size
- 2048+ px, 4096+ px, 8192+ px
Open Ultimate UpscalerBest for
Marketing assets and photo restoration where fine detail matters.
FAQ
Anime upscaler questions
7 questions
What is the best anime upscaler?
For clean line art and flat colours, a Real-ESRGAN-based upscaler is the usual choice — it is what Kenerate uses by default. waifu2x is the classic free option at up to 2× on its web demo; Kenerate goes to 4K, 8K or 128 MP.
Link to this answerHow do I upscale an anime image without blur?
Use an AI upscaler rather than a normal resize. Upload the image to Kenerate, keep Real-ESRGAN selected and download a PNG: lines stay sharp instead of turning soft and grey.
Link to this answerCan I upscale manga pages?
Yes. Real-ESRGAN keeps black ink lines and screentone clean. Scan or save the page as PNG where possible, since JPEG blocks show up in flat areas.
Link to this answerWill the upscaler change the character's face?
Real-ESRGAN and Image Upscaler are faithful — they enlarge and sharpen without redrawing. Creative engines like Clarity Pro can add detail and change small features, so avoid them for character art that must stay on-model.
Link to this answerHow do I upscale anime to 2K?
Keep Real-ESRGAN selected: it returns the image at 2048 px on the long side, which is 2K. For a fixed 2K, 4K or 8K target, pick Image Upscaler and choose the size. Real-ESRGAN always outputs 2048 px, so a picture that is already larger comes back smaller — use Image Upscaler for those.
Link to this answerWhat format should I download?
PNG for anime and line art: it has no compression blocks in flat colours. Use WEBP or JPG only when file size matters.
Link to this answerIs it free?
Free to start: starter credits on sign-up to test it on your own images; bigger jobs use one-time credit packs that never expire. No watermark.
Link to this answerIn depth
Why anime needs a different upscaler
Line art, flat colours and where anime upscalers came from — with sources.
On this page
Line art breaks normal resizing
Anime and manga are built from hard ink edges and flat fills. Ordinary interpolation — bilinear or bicubic — averages neighbouring pixels, which turns crisp black lines into soft grey ramps and makes flat areas blotchy [1][2]. Nearest-neighbour keeps edges hard but turns every curve into a staircase [1].
waifu2x: the first popular anime upscaler
Real-ESRGAN's anime model
Real-ESRGAN (2021) is trained on synthetic real-world damage — blur, noise, resizing and JPEG — so it handles screenshots and reposts that have been compressed several times [6]. Its authors also publish RealESRGAN_x4plus_anime_6B, a smaller model optimised for anime images [7]. Kenerate's default engine is Real-ESRGAN, which is why line art stays dark and clean.
Keep characters on-model
Generative upscalers can add texture that was never drawn — great for paintings, wrong for cel-shaded characters. The perception–distortion trade-off means more invented detail always costs some faithfulness [8]. For character art, stay with Real-ESRGAN or Image Upscaler and download PNG.
By the Kenerate AI teamLast updated and reviewed
We build and run the Kenerate image upscaler; every example on this page is a real output from the input shown.
Sources: Real-ESRGAN — GitHub · waifu2x — GitHub
Upscale your first anime image free
Free credits on sign-up. Real-ESRGAN by default, no watermark.
Tried it? Tell us how it went
