Image Upscaler
This free image upscaler enlarges a photo 2x or 4x using Lanczos resampling and sharpening. It is not a generative AI image upscaler: it does not invent new detail. You still get a larger, downloadable PNG without sending the file to an API.
Privacy: this tool runs in your browser. Your file is not uploaded to PixTools servers.
How to use it
- 1
Upload
Choose a JPEG, PNG, WebP, GIF, or BMP. Very large sources are capped near 16 megapixels.
- 2
Pick 2x or 4x
4x runs two 2x Lanczos passes with sharpening. There is no cloud AI model.
- 3
Download the larger PNG
Check the pixel size in the caption, then save the file.
Why people use it
- Free in-browser enlarge — no signup or API key
- Honest quality enlarge (Lanczos + sharpen), not generative AI
- Downloadable PNG with the new pixel dimensions shown
Related guide: Image upscaler vs AI upscaler
FAQ
Is this a free AI image upscaler?
People search that phrase, but this tool is not generative AI. It upscales with Lanczos resampling and unsharp masking. Edges look crisper; missing detail is not hallucinated.
Will it look like Midjourney or a paid AI upscaler?
No, and we do not claim that. If you need invented texture, use a generative product. If you need a larger file quickly and privately, this is the fit.
Why is output sometimes smaller than 4x?
Very large sources are capped near 16 megapixels so the browser does not run out of memory.
Are photos uploaded?
No. Resize runs on a canvas in your browser. PixTools servers do not receive the image.
Related tools
Same browser, no signup. Jump to another PixTools utility.