Upscale image
Upload an image and enlarge it 2× or 4× using high-quality resampling. It runs entirely in your browser — nothing is uploaded — and downloads the bigger image ready to use.
Enlarge by
Jump straight to a scale — each opens its own page ready to go:
How to upscale an image
- Upload your image — it's processed in your browser and never uploaded.
- Choose 2× or 4×.
- Click upscale and download the enlarged image.
About upscaling images
Upscaling enlarges an image by interpolating new pixels between the originals. FileTinker uses stepped, smoothed resampling so the result is cleaner than a plain stretch — useful for printing a small image bigger, filling a larger frame, or enlarging a logo or graphic.
It's interpolation, not AI: it can't invent detail that isn't in the source, so a blurry or tiny original stays soft when enlarged. Start from the highest-quality source for the best result. Everything runs in your browser, so nothing is uploaded.
Frequently asked questions
How does the upscaler work?
It enlarges your image with high-quality stepped resampling — each doubling is smoothed — which produces a cleaner result than a single big jump or nearest-neighbour scaling. It's honest interpolation, not AI super-resolution, so it makes images bigger without inventing detail.
Will it add detail that isn't there?
No. Upscaling can't recover detail the original doesn't contain; it makes the image larger and smoother. For the best result, start from the sharpest, highest-resolution source you have.
What formats can I upscale?
Common formats including JPG, PNG and WebP. PNG and WebP keep their format; other formats download as a high-quality JPEG.
Is my image uploaded?
No. The enlargement happens entirely in your browser; your image never leaves your device.