Free AI Image Upscaler
Upscale any photo 2×, 3×, or 4×. Free and private in your browser, or switch to AI HD for a fast, server-powered result that works on any device.
First run downloads the model. Subsequent runs are cached and much faster.
Frequently asked questions
Is this image upscaler free?+
Yes. The default upscaler runs entirely in your browser — no signup, no watermark, no upload limit. AI HD is an optional upgrade that runs on our servers for faster results on any device.
Does my photo get uploaded to a server?+
In the free in-browser mode, no — your image never leaves your device. AI HD is different: it sends the image to our server to process, then returns the result. If you need to keep an image fully private, use the free mode.
How big an image can I upscale?+
Free mode handles most images: up to ~1024×1024 at 4× is fast on most laptops, and larger images process in tiles, which is slower. The upscaled result must stay within what a browser can hold — under 16,384px per side and about 128 megapixels total — so extremely large images are rejected with a message. AI HD caps the input at about 2 megapixels (roughly 1400×1400); anything bigger is automatically resized down to that before upscaling, so you still get a much larger result. Very small inputs (200–500 px on the long edge) give the cleanest results.
What's the difference between 2×, 3×, and 4×?+
2× doubles each side (4× the pixel count), 3× triples (9×), 4× quadruples (16×). For most cases 2× is fast and looks great; pick 4× when you need a much larger image.
Can I upscale AI-generated images?+
Yes — that's a great use. Generate an image with our AI generator and bring it here for a 2×–4× upscale before you publish or print it.
What image formats are supported?+
Input: JPG, PNG, WebP. Output is a PNG to keep the upscale lossless.
What is AI HD mode?+
AI HD runs a more powerful upscaler on our servers instead of your browser. It finishes in seconds even on phones and low-end laptops, works when your device can't run the free in-browser upscaler, produces sharper, cleaner detail, and can optionally enhance faces. It requires signing in.