Image Upscaler
Upload an image and scale it up to 2x, 3x, or 4x its original resolution. The upscaling uses the browser's built-in bicubic interpolation (imageSmoothingQuality: high), which produces clean, smooth results — especially good for vector-like graphics, text screenshots, and images that aren't heavily detailed.
This is a straightforward interpolation upscale, not AI super-resolution — it won't hallucinate new detail that wasn't in the original. For photos, the result will be smoother and larger but won't gain sharpness beyond what the source pixels provide. If you need the image at a larger size for a specific layout, print, or placeholder and are fine with interpolation quality, this does the job instantly and entirely in your browser with no upload or server processing.
By The Paper Room Editorial Team — Image Tools
Frequently asked questions
Is this AI upscaling?▼
No — this uses the browser's bicubic interpolation algorithm, not an AI model. It smoothly scales pixels up but does not invent new detail. The result is equivalent to resizing in Photoshop with bicubic smoothing.
What's the difference between 2x, 3x, and 4x?▼
The multiplier applies to both width and height. A 1000x800 image at 2x becomes 2000x1600, at 3x becomes 3000x2400, and at 4x becomes 4000x3200. Higher multipliers produce larger files and take slightly longer to process.
When does bicubic upscaling work well?▼
It works best for graphics, logos, text screenshots, and diagrams where the original content has clean edges. For heavily detailed photographs, the result will be smoother and larger but noticeably softer compared to a native high-resolution capture.