🖼️ Image Resizer
Resize images online in your browser — change width, height, or scale with the Canvas API. Free, private, no upload.
Need to shrink a photo for a website, resize a product image for a marketplace, or scale down a huge screenshot before sending it by email? Our Image Resizer resizes images directly in your browser using the Canvas API — you pick the new width and height (or a percentage), and the tool produces a properly scaled JPG, PNG, or WebP file you can download instantly.
The conversion happens entirely on your device. You select a file, the image is decoded, redrawn at the new dimensions, and encoded to your chosen format — nothing is uploaded to any server. That makes it safe for private photos, documents, and anything else you don’t want leaving your machine.
Real-world uses: resizing a product photo to the exact pixel size a shop requires, compressing a phone screenshot for a forum or helpdesk ticket, creating a consistent set of thumbnails for a gallery, or scaling an image down so it loads faster on a web page. The tool preserves the aspect ratio by default (just type a width), but you can also enter both width and height explicitly or scale by a percentage.
One honest note: while this tool genuinely redraws the image (it doesn’t fake the resize), a quality lossless resize is only possible when you scale down or keep the same dimensions. Scaling a small image up creates new pixels and softens detail — no tool can invent detail that wasn’t in the original. For the best result, resize down from the largest original you have.
Runs entirely in your browser — nothing is uploaded.
Frequently Asked Questions
Is this a real resize or just a preview?
It's a real resize. The tool decodes your image, redraws it at the new dimensions on an HTML5 canvas, and re-encodes it as a JPG, PNG, or WebP file. The Download button saves that actual resized file — the result you see is the file you get.
Can I keep the aspect ratio?
Yes. If you type only a width, the height is calculated automatically to match the original proportions, and vice versa. You can also type both width and height to force exact dimensions (which may stretch the image), or use the Scale field to resize by a percentage.
Which format should I choose?
Use JPG for photos and anything without transparency — it's the smallest file for photographs. Use PNG when you need transparency or a lossless result (for example, logos, screenshots, or diagrams). Use WebP when a platform supports it: it often beats both JPG and PNG on file size with similar quality.
Are my images uploaded anywhere?
No. Everything runs locally in your browser using the Canvas API — your image never leaves your device. This makes the tool safe for private photos, documents with sensitive content, or any file you don't want shared with a third-party service.