Tool guide
Image Resizer: guide & how to use
Resize and compress images in your browser.
Upload an image, set target dimensions with optional aspect-ratio lock, pick output format and quality, then download the result. Uses the Canvas API—nothing is uploaded to a server. This guide is part of our guides library in the Images category—Resize, convert formats, and encode images to Base64—all processed locally in your browser.
What this tool does
Image Resizer — Resize and compress images in your browser. It fits alongside other utilities on AI Tool Hub so you can solve small problems quickly without installing desktop software.
When it helps
Reach for this tool when your work overlaps with topics like: image, resize, compress, scale, dimensions, png, jpeg, webp. Teams use these utilities for ad hoc checks during development, studying, content drafting, and light business calculations—always double-check critical numbers against your own policies or professionals when stakes are high.
How to use it
- Upload an image by clicking or dragging into the drop zone.
- Set the desired width or height; enable lock to keep the aspect ratio.
- Pick output format and quality, then download the resized image.
Common questions
- Is my image uploaded anywhere?
- No. Resizing uses the HTML Canvas API entirely in your browser.
- What formats are supported?
- Most raster formats your browser can decode (PNG, JPEG, WebP, GIF, BMP, etc.).
Related tools
Pair this workflow with other utilities on the site:
Privacy
Like most utilities in this category, Image Resizer runs locally in your browser after the page loads—your content is not sent to our servers for processing.