Free AI Image Upscaler & Enhancer: What 2× Really Fixes

How the free AI image upscaler works in your browser

Everything runs on your own computer through Transformers.js, which matters for private photos and client work.

• The first run downloads the Swin2SR model with a progress bar; your browser caches it for later visits
• The image is processed in tiles, and the status bar shows the tile count so you can see progress on large jobs
• WebGPU in recent Chrome or Edge uses the graphics card and is much faster; other browsers fall back to WebAssembly on the processor
• Each run is exactly 2×: a 500×500 image becomes 1000×1000, four times the pixel count
• Inputs larger than 2,000 pixels on the long side are first fitted to 2,000, so the largest possible output is 4,000 pixels

The result is always a lossless PNG with -2x added to the file name, so you never confuse it with the original. There is no account, no daily quota and no watermark; the only practical limit is your device's speed and memory.

Images that improve and images that will not

Upscaling adds believable detail. It does not recover information the camera never captured.

• Great candidates: product photos exported too small, old website images, logo screenshots and low-resolution scans of prints
• Decent: images with light JPEG compression; blocky artifacts usually soften into smoother texture
• Poor: motion blur, badly out-of-focus shots and tiny 64-pixel thumbnails, where there is nothing left to sharpen
• Careful with faces: the model can invent pores, eyelashes or teeth texture, so compare against the original at 100 percent

A quick test: view the original at its actual size. If it looks sharp there and simply too small, an upscaler will help. If it already looks soft at actual size, expect a bigger soft picture.

Text deserves a special warning. Small lettering on a label, sign or screenshot can come back crisp, but when the source letters are only a few pixels tall the model may guess wrong shapes, turning an 8 into a B or merging two characters. Proofread every word before an enlarged image goes on a product page, a menu or a slide, and retype important text in your layout app instead of relying on the pixels.

Matching the enlarged size to the job

Work backward from the size you need rather than making everything as large as possible.

• Web hero banner: 1,600 to 2,000 pixels wide is plenty, so a 900-pixel source needs one pass
• Print at 300 pixels per inch: a 4×6 wants 1200×1800 and a 5×7 wants 1500×2100; at 200 ppi, which often looks fine at arm's length, an 8×10 needs 1600×2000
• Marketplace listings: Etsy has recommended at least 2,000 pixels on the shortest side, so a 1,000-pixel product shot is a natural candidate
• Social posts: platforms recompress uploads, so a 1,080-pixel Instagram image gains little from going larger

You can run the 2× PNG through again for more size, but remember the 2,000-pixel input cap, and that stacking passes also stacks any artifacts. Inspect the first result at 100 percent before deciding on a second.

Finishing touches after upscaling

An upscaled PNG is large, so a little cleanup keeps it practical.

• Crop first, then upscale; cropping afterward wastes processing on pixels you throw away
• Convert a web copy to JPG or WebP and compress it to around 200 to 400 KB so pages stay fast
• Keep the full-size PNG as your master for print and future edits
• Apply color and contrast changes in the Photo Editor after upscaling, not before
• For flat logos and icons, trace to SVG instead, which scales to any size with perfectly sharp edges

As a rough guide, a 2,000-pixel upscaled PNG can weigh several megabytes, while the same picture as a well-compressed JPG often lands under 400 KB with no visible difference on a phone screen.

If the enlarged file is heavy, the Compress Image tool can trim its size for sharing.

▶ Watch: How to upscale an image with AI (0:32)

0:32

Video transcript

1. Choose the AI model. Best quality keeps the most detail. Fast is quicker on older computers.
2. Add a small image. Drop a low-resolution photo. The model is downloaded once, then cached.
3. Compare before and after. The new image has twice the width and height, with sharper edges.
4. Download the PNG. Save the upscaled copy for print, slides or a sharper thumbnail.

Step-by-step

Common mistakes to avoid

Pro tips

Frequently asked questions