Free Online Image Resizer
Resize images to exact pixel dimensions or percentages - with aspect-ratio lock
How it works
- 1Upload an image
Drop or select a JPG, PNG, or WebP file.
- 2Pick target size
Enter width and height (or scale %) - or choose a preset like 1080×1080 (Instagram) or 1280×720 (YouTube thumbnail).
- 3Download the resized image
Save the resized file. Original aspect ratio is preserved unless you unlock it.
About Free Online Image Resizer
Free online image resizer. Change any JPG, PNG, or WebP to an exact width and height, or scale by percentage, with optional aspect-ratio lock. Presets for Instagram, YouTube thumbnail, Twitter card, and other social sizes. Runs entirely in your browser. Free Online Image Resizer on 712 Tools runs entirely inside your browser using modern JavaScript APIs - no server ever sees your data. That means instant results, complete privacy, and no upload limits.
Whether you need to resize images to exact pixel dimensions or percentages - with aspect-ratio lock for a debugging session, a quick sanity check, or a production incident, this tool is free to use as many times as you need. There are no watermarks, no sign-up, and no ads inside the tool itself.
Frequently asked questions
Will resizing lose quality?
Downscaling is lossless in perception - the resizer uses high-quality bilinear resampling. Upscaling always loses sharpness; for that, an AI upscaler is a better tool.
Does the output format match the input?
By default yes. Optionally export a resized PNG as JPG or WebP for smaller file size.
What are the social presets?
Instagram square (1080×1080), Instagram story (1080×1920), YouTube thumbnail (1280×720), Twitter/X post (1600×900), LinkedIn banner (1584×396), and Facebook cover (820×312).
Are my images uploaded?
No. Resizing runs in your browser via the Canvas API.
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