Upscale an Image 4×
Quadruple an image's size with clean, sharpened resampling.
Free · No watermark · Private — your image never leaves your browser
Pre-set to quadruple your image, with sharpening on so the result doesn't look soft.
Everything runs in your browser on your own device. Your image is never sent to a server, unlike most online upscalers.
Download the full-resolution result with no watermark and no sign-up — the site is supported by ads.
How it works
Need an image four times bigger? This opens straight on 4× upscaling. It enlarges in stepped passes and sharpens the result so the larger image stays as crisp as possible, then lets you compare before and after. It's handy for turning a small graphic or photo into something usable at a larger size for print or a big display. Everything runs in your browser — no upload, no watermark — and downloads as a full-resolution PNG. Very large inputs are capped so your browser stays stable.
Frequently asked questions
Can I also do 2×?⌄
Yes — switch the scale to 2× any time; this page just starts on 4×.
Why is my 4× result capped in size?⌄
To avoid crashing the browser tab, output is limited to about 4096px on the longest side, so very large inputs upscale a little under 4×.
Is it free?⌄
Yes — no watermark, no account, nothing uploaded.