4 Best Free AI Image Upscaler Websites and Apps

Here is a list of best free AI image upscalers. A normal resize just stretches pixels, so an enlarged photo looks soft and blocky. An AI upscaler instead predicts the missing detail, which lets you turn a small web image, an old scan or an AI-generated picture into a larger, sharper file suitable for printing or a high-resolution screen.

Screenshot: Upscale.media image upscaler.

Online upscalers are convenient but almost always limit free use with credits, and some add a watermark. A free desktop app avoids those limits because it uses your own computer’s graphics card. Both kinds are listed below.

Top Pick:

Upscayl is the best free choice if you can install an app. It is open source, has no usage limits or watermarks, and works offline on Windows, macOS and Linux.

For a quick online upscale with no install, Pixelcut or Upscale.media are the simplest.

Comparison Table:

Tool	Type	Free limit	Watermark on free results
Upscayl	Desktop app (open source)	Unlimited	x
Let’s Enhance	Website	10 credits on sign-up, up to 8 MP	✓
Upscale.media	Website	3 credits per month	x
Pixelcut	Website	Limited free upscales	x

Upscayl

Upscayl is a free and open-source AI image upscaler for Windows, macOS and Linux. Choose an image or a whole folder, pick a model (there are models for general photos, digital art and sharper detail) and select 2×, 3× or 4× enlargement. A “double upscayl” option runs two passes for even larger output.

Because everything runs on your own computer, there is no account, no upload and no limit on the number of images. It works best with a GPU that supports Vulkan; on older hardware it is slower but still usable.

Pros	Cons
Completely free, no limits or watermark	Must be installed
Batch-upscale entire folders	Needs a reasonably modern GPU for good speed
Works offline, photos stay private

Home Page

Let’s Enhance

Let’s Enhance is a popular online upscaler aimed at photographers and online sellers. New accounts get 10 free credits, and free results can be upscaled up to 8 megapixels. Free downloads carry a watermark, which is removed on paid plans. Besides upscaling, it can fix color, lighting and compression artifacts.

Use the free credits to judge quality before deciding whether you need a paid plan for print-size output.

Pros	Cons
High-quality results for photos	Watermark on free downloads
Also fixes lighting and JPEG artifacts	Only 10 free credits
No credit card for the free plan	Free output limited to 8 MP

Home Page

Upscale.media

Upscale.media upscales images up to 4× in the browser and includes a face-enhancement option for portraits. The free plan gives 3 credits and 3 downloads every month, which is enough for occasional use. Paid monthly plans are available if you need more.

Pros	Cons
Simple drag-and-drop interface	Only 3 free images per month
Face enhancement for portraits
No watermark on free downloads

Home Page

Pixelcut

Pixelcut is an AI photo editor with a free image upscaler that enlarges photos 2× or 4× right in your browser. It is quick and designed for product photos and social media images, and the same site includes a background remover and other editing tools. The number of free upscales is limited, with higher volumes on its Pro plan.

Pros	Cons
Fast, easy online upscaling	Free usage is limited
Part of a larger photo editing toolkit	Best features need Pro

Home Page

Final Thoughts:

If you upscale images regularly, install Upscayl and forget about credits. For the occasional photo, the online tools are faster to reach: Upscale.media and Pixelcut for clean free results, and Let’s Enhance to test top-quality photo upscaling before buying.