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A small product photo, a blurry screenshot, an old scan, a compressed social image. PNG, JPG and WebP up to 6 MB work.
AI Image Upscaler
Free AI image upscaler online. Upload a small or blurry photo and get a sharp 2x version in seconds: unblur, enhance, increase resolution. No sign-up.
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Drop your image here or click to upload
PNG, JPG or WebP, up to 6 MB. Larger images are resized to 1024 px before upscaling.
Free run: 2x upscale, up to 2048 px. Inside Krater: up to 4x, 8K and video.
One free run per visitor, verified automatically, no account needed.
How it works
How to upscale an image with AI in three steps
No settings to learn. Upload, wait a few seconds, download.
Let the model reconstruct detail
The upscaler analyses edges, textures, faces and text, and rebuilds them at twice the resolution instead of just stretching pixels.
Download the enhanced image
Get a sharp, print ready version. Inside Krater you can go up to 4x, enhance video and edit the result with every image model.
Before and after
AI image upscaler examples
Every pair below was upscaled on Krater from the low resolution image on the left. No prompt, no manual sharpening.
Robotic skull render
What changed: Soft 384 px render upscaled to sharp metal, wiring and reflections
Astronaut in a meadow
What changed: Blurry thumbnail upscaled to crisp flowers, fabric texture and visor detail
Race car poster
What changed: Compressed poster upscaled with clean type, sponsor logos and body lines
Dinosaur skeleton
What changed: Low resolution museum shot upscaled to readable bone texture and lighting
Gladiator in the arena
What changed: Small image upscaled to sharp armor, stonework and skin detail
Knight at moonlight
What changed: Dark, soft scene upscaled with clean edges and preserved atmosphere
AI photo enhancer
What an AI image upscaler does
An AI image upscaler increases the resolution of a picture and adds real detail while doing it. A normal resize stretches the pixels you have and the result gets soft. An AI upscaler has learned what edges, skin, fabric, text and textures look like at high resolution, so it reconstructs them: a 500 px product photo becomes a 1000 px image that looks like it was shot that way.
The same technology unblurs slightly out of focus photos, removes JPEG compression artifacts, cleans up noise from low light shots and rescues old scans and screenshots. It is the fastest fix for images that are too small for print, a website hero, a marketplace listing or a large screen.
On this page you can upscale one image free, 2x with our default model. Inside Krater you can upscale up to 4x, enhance video to 4K, and finish the enhanced image with every editing model we host.
Every enhancement model in one place
Pick the model for the job
The free upscale uses Crystal, a fast model that reconstructs detail without inventing it. Inside Krater you can upscale up to 4x, enhance video and finish the image with every editing model.
Techniques
Upscale, unblur, denoise: every way to enhance a photo
Image enhancement is one upload but several different problems. These are the four the upscaler solves most often.
Increase resolution
Go from a small web image to print or hero size. 2x here, up to 4x inside Krater. Edges stay crisp and textures are rebuilt rather than blurred.
Unblur and sharpen
Slightly out of focus or motion blurred photos get their edges back. Faces, product edges and lettering become legible again without halos.
Remove compression and noise
Screenshots, downloaded social images and low light shots carry blocky artifacts and grain. The model smooths them while keeping real detail.
Restore old photos and scans
Scanned prints and old digital photos are usually small and soft. Upscaling brings back detail; the AI image editor can then fix scratches and colors.
How to get the best upscale
- Start from the largest, least compressed version of the image you have; every upscale is better with more real detail to work from.
- Crop first, upscale second: enlarge only the part you need so all the resolution goes where it matters.
- For print, aim for 300 pixels per inch of the final size; a 2x upscale of a 1000 px image covers a 17 cm wide print.
- Upscale at the end of your workflow, after editing and color corrections, so artifacts are not enlarged with the image.
What people enhance with AI
One small image, every size you need
An AI photo enhancer turns the images you already have into ones that hold up at any size.
Product and listing photos
Meet marketplace resolution requirements and zoom views without reshooting the catalog.
Print and large format
Turn web sized images into posters, packaging, banners and brochures that stay sharp.
Old photos and scans
Rescue family photos, archive images and scanned prints that were never high resolution.
Screenshots and UI
Make small screenshots crisp for docs, decks, app store listings and tutorials.
Social and web images
Recover images that were compressed by messaging apps and social platforms.
AI generated images
Upscale generated art and renders to full resolution for portfolios, clients and print.
Suitable for everyone
One AI image upscaler for every kind of work
Whether you enhance one family photo or an entire product catalog, the workflow is the same: upload, upscale, download.
Shops and marketplaces
Bring every product image up to the resolution your channels demand, consistently.
Designers and agencies
Enlarge client assets, mockups and references without waiting for better source files.
Photographers
Deliver crops and older work at print resolution, and rescue soft frames from a shoot.
Marketers and social teams
Reuse existing visuals across formats, from stories to billboards, without quality loss.
Creators and AI artists
Upscale generated images and thumbnails to full resolution for every platform.
Teams and operators
Standardize image quality across catalogs, documentation and presentations from one workspace.
Every image model, every app
Your image enhancement, finally in one place
Upscaling, editing and generation models plus the apps you already use, working together in one workspace.
Why Krater
Upscaling plus every leading image model, one workspace
Krater is The All-in-One AI Workspace. Upscaling is one of hundreds of things you can do in a single chat, with 400+ AI models behind it.
Up to 4x and video
Go beyond 2x: 4x upscaling for print, and frame by frame video upscaling to 4K, all from the same chat.
Fast by default
Most upscales finish in seconds. Batch several images in one conversation and download them together.
Your images stay yours
Uploads are used only to produce your result. Inside Krater everything you create is stored in your own workspace.
Beyond upscaling
Continue in the same chat: remove a background, restyle the image or turn it into a short video.
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AI image upscaler FAQ
What is an AI image upscaler?
An AI image upscaler increases the resolution of a picture while reconstructing real detail. Instead of stretching pixels, the model rebuilds edges, textures, faces and text the way they would look at the higher resolution.
Is this AI image upscaler free?
Yes, your first upscale on this page is free and needs no account. To upscale more images, go up to 4x, enhance video and edit the results, get started on Krater with a paid workspace.
How much can it upscale?
The free run doubles the resolution (2x) and returns up to about 2048 px on the long side. Inside Krater you can upscale up to 4x and enhance video to 4K.
Can it unblur a photo?
Yes, for mild blur and softness. The model sharpens edges and reconstructs texture. Heavy motion blur or extreme out of focus shots cannot be fully recovered by any tool.
Does it work on faces and text?
Yes. The default model is chosen because it keeps faces natural and lettering legible instead of inventing features. For very small faces or dense text, start from the best source you have.
Which file types and sizes are supported?
PNG, JPG and WebP up to 6 MB. Images larger than 1024 px on the long side are resized to 1024 px before the free 2x upscale.
Will the upscaled image look artificial?
The model is tuned to add detail that is consistent with the original rather than repainting it. Results look like a sharper version of your photo, not a new image.
Can I upscale images for print?
Yes. Aim for roughly 300 pixels per inch of the final print size. A 2x upscale of a 1000 px image covers about 17 cm wide; inside Krater 4x covers larger formats.
Do you keep my images?
Uploads on this page are used only to produce your result and are not shown to anyone else. Inside Krater everything you create is stored in your own private workspace.
What happens after the free upscale?
The page shows your result and a sign up option. In Krater you get 4x upscaling, video enhancement, every image editing model and 400+ AI models in one workspace.
Upscale up to 4x, enhance video, edit with every model
One workspace, 400+ AI models, upscaling, image editing, video, text and more. Get started and take your enhanced image further.