Free AI Image Upscaler: Upscale Images Online

Drop your photo into the tool above, choose Fast or AI Enhance, pick 2x, 4x, 8x or a custom size, and click Upscale. Download the enlarged image when it finishes. It is free, with no sign-up, no watermark and no upload, because everything runs in your browser.

Upscale the image. Choose a scale such as 2x or 4x and the tool makes a larger version with more pixels, for example a 1000 x 1000 photo becomes 4000 x 4000 at 4x. AI Enhance rebuilds edges and texture as it enlarges, so the result looks sharper than simply stretching the photo.

For a small or soft photo, upscale it with AI Enhance, or use Fast mode and raise the sharpness slider. Then save as PNG for the best quality. Upscaling makes a low-resolution photo look cleaner at a bigger size, but it cannot restore detail the camera never captured.

Enlarging with plain stretching makes photos blurry. This tool uses high-quality resampling with sharpening, or AI Enhance, to keep edges clean when you make a photo bigger. For making images smaller, use our Image Resizer or Image Compressor instead.

No. Your photos are opened, enlarged and saved by your own browser. They never leave your device. The only things downloaded are the page itself, the small AI engine code, and the AI model file the first time you use AI Enhance.

Yes. AI Enhance and Fast mode are both free, with no sign-up, no daily limit and no watermark on your results. ToolDeck may show ads to pay for hosting, but they never lock a feature.

Enlarging photos uses a lot of memory. Each 25 MB photo held for processing can use 100 MB or more in RAM. A batch of 20 photos with Fast mode is safe on almost every device, including laptops and phones with 4 GB RAM. Higher batches would crash low-end devices and lose work. We chose 20 as the safest maximum that still handles real work.

Not if you follow two simple rules: close other browser tabs before starting, and use Fast mode with 2x size for large batches. Devices with 4 GB RAM or less may still slow down noticeably with 15 to 20 photos. If your device struggles, upscale in smaller batches of 5 to 10.

AI Enhance uses a neural network to rebuild edges and texture, so enlarged photos look sharper and more natural. It takes longer, especially on big photos. Fast uses smooth enlarging with a sharpening step and is the default. It finishes in seconds and works on any photo, but it cannot invent new detail.

The AI works through your photo in small tiles, and it runs on your own device. A phone or an older laptop will be slower than a desktop with a modern graphics card. Photos above about 1.5 megapixels can take a few minutes. If you are in a hurry, choose Fast.

2x keeps the most natural look and is the safest choice for large batches. 4x is the balanced default for most photos. 8x gives the largest result and works best on photos that are small to begin with. If you need a specific output size, switch to Custom and slide to any value from 2x to 16x. If a size is greyed out, the result would be too large for a browser tab.

The browser canvas limit is about 64 megapixels and 12,000 pixels per side. That means a 2000 x 2000 photo can go up to about 8x, but a 4000 x 4000 photo tops out at around 4x. If you pick a scale that would exceed the cap, that scale is disabled and any photos that would exceed it are skipped with a clear note.

PNG is the sharpest and has no quality loss, but the files are large. JPG and WebP make much smaller files with a small loss in quality. Pick WebP if you want small files and your app supports it, and JPG for the widest compatibility. For big batches, WebP saves memory and time.

It can make a low-resolution photo look cleaner and sharper at a larger size. It cannot recover detail that was never captured, so a photo that is badly out of focus will still look soft.

You can add up to 20 photos at once, up to 25 MB each. AI Enhance works on photos up to about 8 megapixels. Larger photos use Fast automatically. The enlarged result can be at most 64 megapixels and 12,000 pixels on its longest side, because browsers cannot handle more than that in a single tab.

Once the page, the AI engine and the model have loaded, you can switch off your connection and keep upscaling. Reloading the page offline will not work unless your browser has cached those files.

Yes. After upscaling, click Download all (ZIP) and every finished photo is packed into a single ZIP file. Individual photos can also be downloaded one at a time.

Yes. Safari on iOS and Chrome on Android both work. Mobile is slower with AI mode, so Fast mode is recommended on phones. For batches over 10 photos, we recommend a desktop.