Upscale images online · no watermark
Upscale image online — 2×, 4× or any size
Make a small picture bigger without the blur of a normal resize. Pick 2K, 4K, 8K or an exact megapixel size and the AI rebuilds edges and texture as it enlarges.
- 2K, 4K, 8K or up to 128 MP
- No watermark
- PNG, JPG or WEBP out
- Free credits
Updated by the Kenerate AI team
On this page
Quick answer
How do you upscale an image online?
To upscale an image online, open Kenerate AI's image upscaler, add the picture, pick a size and download the result, which takes about 15–80 seconds. AI rebuilds edges and texture as it enlarges, up to 8K or 128 MP, so the image looks sharper than after a normal resize. It is free to start, with no watermark.
Key facts
- 2× / 4×
- 2× = 4× the pixels · 4× = 16×
- 4K
- Image Upscaler, any input size
- Biggest
- 8K, or up to 128 MP
- Time
- About 15–80 seconds
- Engines
- Real-ESRGAN · Image Upscaler (2K/4K/8K) · Kenerate Upscale (4–128 MP)
How it works
How to upscale an image online
Upload, choose a size, download. The output size is shown before you run it.
- Time needed
- Steps
- 4 steps
Step 1
Open the upscaler and add your image
Go to kenerateai.com/app/tool/image-upscale and upload a JPG, PNG or WEBP up to 25 MB.
Step 2
Choose how big
Real-ESRGAN enlarges and sharpens in one pass. For a set size pick Image Upscaler → 2K, 4K or 8K, or Kenerate Upscale → 4 to 128 megapixels; the tool shows the exact pixel size your image will come out at.
Step 3
Run it and compare
Press Upscale. After 15–80 seconds drag the slider to compare the result with the original.
Step 4
Download
Download PNG, JPG or WEBP with no watermark, or open it in Edit Studio.
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
Step by step
How do I upscale an image without losing quality?
The full walk-through, with the exact menus in the Kenerate tool.
Step 1: Open the upscaler and add your image
Go to kenerateai.com/app/tool/image-upscale and upload a JPG, PNG or WEBP up to 25 MB.
Step 2: Choose how big
Real-ESRGAN enlarges and sharpens in one pass. For a set size pick Image Upscaler → 2K, 4K or 8K, or Kenerate Upscale → 4 to 128 megapixels; the tool shows the exact pixel size your image will come out at.
EngineImage Upscaler4K
Tip: For photos you plan to print, pick Kenerate Upscale and a megapixel size — the tool shows the output in pixels for your image.
Step 3: Run it and compare
Press Upscale. After 15–80 seconds drag the slider to compare the result with the original.
Step 4: Download
Download PNG, JPG or WEBP with no watermark, or open it in Edit Studio.
At 100%
Upscaled vs stretched, zoomed in
The same crop from the original stretched with bicubic resizing, and from the real upscale.
Reference
What size should I upscale my image to?
Pick the size by where the image is going. Screens are measured in pixels; prints need about 300 pixels per inch to look sharp at arm's length.
| Size | Pixels | Good for |
|---|---|---|
| HD (720p) | 1280 × 720 | Web, email, thumbnails |
| Full HD (1080p) | 1920 × 1080 | Social posts, slides |
| 2K / QHD | 2560 × 1440 | Websites, monitors |
| 4K UHD | 3840 × 2160 | Wallpapers, TVs, large screens |
| 8K UHD | 7680 × 4320 | Big prints, banners |
| 4×6 in print | 1200 × 1800 | Photo print at 300 PPI |
| 8×10 in print | 2400 × 3000 | Framed print at 300 PPI |
| A4 print | 2480 × 3508 | Documents, posters at 300 PPI |
2× vs 4×: 2× doubles the width and height (4 times the pixels); 4× makes it four times wider and taller (16 times the pixels). A 960 px wide image needs 4× to pass 3840 px, the width of 4K.
Comparing engines? The AI image upscaler page explains all seven. For a straight 4K job, upscale image to 4K opens the tool on the 4K setting.
Engines
Which engine should I use to upscale an image?
Faithful engines for a straight upscale. For blurry or old photos, see Phota Enhance on the enhancer page.
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.
Clarity AI
Clarity Pro
- Style
- Creative
- Speed
- About 81 s
- Output
- Up to 64 MP
Open Clarity ProBest for
Campaign visuals and artwork for print. On faces keep creativity low — higher values can change the person.
Without AI tools
How to upscale an image in Photoshop
Photoshop has two built-in ways. Super Resolution is AI-based but fixed at 2×; Image Size works for any size but only interpolates.
Step 1: Open the photo in Camera Raw
Open the file itself in Camera Raw — for a JPEG, use Open in Camera Raw from Adobe Bridge — or in Lightroom. Super Resolution is not in the Camera Raw Filter.
Step 2: Run Super Resolution
Right-click the image and choose Enhance, then tick Super Resolution. The result is 2× the width and height (4× the pixels).
Right-clickEnhanceSuper Resolution
Step 3: Or resample in Image Size
For other sizes choose Image → Image Size, tick Resample and pick a resampling method. This adds pixels by interpolation, so the result is softer than an AI upscale.
ImageImage SizeResample
More examples
Upscaled with Kenerate
Hover — or tap “Original” — to see what went in.
FAQ
Upscale image questions
9 questions
How do I upscale an image for free?
Open the Kenerate image upscaler, add your picture and run the default Real-ESRGAN engine. New accounts get free credits to test, and bigger jobs use one-time credit packs that never expire. There is no watermark.
Link to this answerHow do I upscale an image to 4K?
Choose the Image Upscaler engine and pick 4K. It outputs 4K whatever the input size. In our test a 480 px landscape came out at 5461 × 3072 pixels.
Link to this answerWhat does 2× or 4× upscaling mean?
2× doubles the width and the height, so the image has 4 times as many pixels; 4× makes it 4 times wider and taller, 16 times the pixels. A 500 × 500 image is 1000 × 1000 at 2× and 2000 × 2000 at 4×.
Link to this answerWill upscaling make a blurry image sharp?
It helps with softness from a small size or compression. For a photo that is out of focus or shaken, use Phota Enhance, which is built to repair blur, grain and old-photo damage.
Link to this answerHow do I upscale an image in Photoshop?
Open the photo in Camera Raw, right-click it, choose Enhance and tick Super Resolution — that doubles the width and height. For any other size use Image → Image Size with Resample on.
Link to this answerHow many pixels do I need to print?
About 300 pixels per inch for a sharp print: 1200 × 1800 px for a 4×6 in photo, 2400 × 3000 px for 8×10 in, and 2480 × 3508 px for A4.
Link to this answerCan I upscale several images at once?
The upscaler processes one image per run. Every result is saved in your history, so you can run several in a row and download them later.
Link to this answerHow does image upscaling work?
Upscaling adds new pixels between the ones you have. A normal resize fills them by averaging the neighbours (bicubic or Lanczos), which spreads edges and looks soft. An AI upscaler such as Real-ESRGAN is a neural network trained on pairs of small and large images, so it predicts sharp edges and texture for the new pixels instead. It cannot recover detail that was never captured.
Link to this answerDoes upscaling reduce quality?
An AI upscale adds pixels without the blur of a normal resize, so it usually looks better, not worse. Upscaling an already large image gives little benefit — the tool warns you if the size you pick is smaller than your image.
Link to this answerIn depth
How big should an image be? Sizes from the platforms
Screen, social and print sizes from each platform's own help pages — so you upscale to the size you actually need.
On this page
Online stores
Prints
Photo labs publish their own minimums. Walgreens asks for 300 DPI and lists 540 × 360 px as the minimum for a 4×6 print and 5400 × 3600 px for a 24×36 poster [6]; Shutterfly recommends 1600 × 1200 px for 8×10 and 2400 × 3600 px for 24×36 [7]. At the classic 300 PPI, a 4×6 is 1200 × 1800 px and an 8×10 is 2400 × 3000 px — pick Kenerate Upscale and a megapixel size to hit those exactly.
Upscale once, from the best copy
Each round of resizing and JPEG saving adds damage. Real-ESRGAN was trained on exactly that kind of repeated degradation [8], but it still works best on the largest, least-compressed copy you have — upscale once to the final size rather than in several steps.
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 of the tool from the input shown.
Sources: Adobe — Super Resolution in Camera Raw · Adobe — Resampling options in Photoshop
Upscale your image now
Free credits on sign-up. 2K, 4K, 8K or up to 128 MP. No watermark, no subscription required.
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