Upscale Image
Drop an image below, choose an upscale factor (2×, 3×, 4× or custom) and an output quality, then click Upscale. The image is enlarged with high-quality smoothing to keep it as sharp as possible, and transparent images stay transparent. Everything happens locally in your browser — your image never leaves your device.
Read the guide: How to upscale an imageInput
Higher quality keeps the upscaled image sharper. Transparent images are saved as PNG; photos as JPG.
Output
Processed locally in your browser — nothing is uploaded.
How the Upscale Image works
- Your image is loaded into an in-browser HTMLImageElement — nothing is uploaded.
- It's drawn onto a larger canvas at your chosen factor using high-quality smoothing.
- The canvas is re-encoded at the output quality you choose (transparent images become PNG, photos become JPG).
- The before/after file size and new dimensions are shown so you can check the result before downloading.
Useful tips
- Use 2× for a gentle enlargement that stays reasonably sharp; go higher only when you need much larger dimensions.
- Keep output quality at 90% or above for upscaled photos — lower quality shows artefacts more on enlarged edges.
Frequently asked questions
Is my image sent to a server?+
No. All upscaling happens entirely in your browser using a canvas. Nothing is uploaded or stored.
How does the upscaling work?+
The image is drawn onto a larger canvas using the browser's high-quality image smoothing (bicubic-style interpolation). This enlarges the image while keeping edges as smooth as the browser allows — no AI, no upload.
What does the output quality setting do?+
It controls the encoding quality of the result (for JPG). Higher quality keeps the upscaled image sharper at a larger file size; lower quality trades a little sharpness for a smaller file. Transparent images are saved as PNG, which is lossless.
Will upscaling make a small image look better?+
Upscaling increases the dimensions, but it can't add detail that wasn't in the original. It's great for fitting an image into a larger layout or preparing it for print, but a very small or blurry source will still look soft when enlarged.
Related guides
How to compress JPG images
Large JPG files slow down websites and fill up storage. This guide explains how JPG compression works, how the quality setting trades size for sharpness, and how to pick a sensible level for photos and graphics — all using a free tool that runs entirely in your browser.
How to compress PNG images
PNG files are large because the format is lossless and keeps every colour and pixel. This guide explains how PNG compression works, how reducing colour depth shrinks the file while preserving transparency, and how to choose a sensible level — all using a free tool that runs entirely in your browser.
How to compress WebP images
WebP produces smaller files than JPG and PNG while supporting transparency, but it can still be trimmed further by re-encoding at a lower quality. This guide explains how WebP compression works, how the quality setting trades size for sharpness, and how to pick a sensible level — all using a free tool that runs entirely in your browser.
How to reduce image file size to a target
Sometimes you need an image under a specific size — for an upload limit, an email attachment or a web budget. This guide explains how target-size optimisation balances quality and dimensions to hit a file-size limit, and how to reduce an image to 100 KB, 500 KB, 1 MB or 2 MB — all using a free tool that runs entirely in your browser.
Related tools
Compress JPG
Compress JPG images and reduce file size — choose your quality level, all in your browser.
Compress PNG
Compress PNG images and reduce file size while preserving transparency — all in your browser.
Compress WEBP
Compress WebP images with adjustable quality — all in your browser.
Reduce Image File
Reduce an image to a target file size (100 KB, 500 KB, 1 MB, 2 MB or custom) — all in your browser.
