Resize any image to exact pixel dimensions in your browser, with an aspect-ratio lock, 25/50/75% presets and high-quality smoothing. Free — nothing is uploaded.
How the image resizer works
The image is redrawn onto a canvas at your target dimensions with the browser's high-quality smoothing enabled. Large downscales are done in halving steps — each pass shrinks the image by at most half — because a single big jump makes the sampler skip pixels and produces jagged, shimmery results; stepping keeps text and fine detail crisp. With the aspect-ratio lock on, editing one dimension recalculates the other from the original proportions, so nothing gets stretched. The output keeps your input format (PNG, JPEG or WebP), falling back to PNG for anything else.
ctx.imageSmoothingQuality = "high" // halve repeatedly, then drawFrequently asked questions
Is my image uploaded anywhere?
No. Resizing happens entirely in your browser on a canvas — your image never leaves your browser. Nothing is sent to a server, logged or stored, and the picture itself never appears in the page URL.
Will enlarging an image improve its quality?
No — upscaling can't invent detail that was never captured. The resizer interpolates smoothly, so a modest enlargement looks acceptable, but a big one will be soft. For crisp results, always work from the largest original you have and scale down, not up.
Why keep the aspect ratio locked?
Changing width and height by different factors stretches or squashes everything in the picture — faces and circles show it immediately. Keep the lock on and set just the dimension you care about; the other follows automatically. Unlock it only when you genuinely need a non-proportional stretch.
Last updated: 8 July 2026
More tools
Runs entirely in your browser — your images are never uploaded. ImageMint · MintKit