Resize
Image Resizer
Resize images to exact dimensions in your browser.
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Basic
What it is & how to use it
Change image width/height for channels that enforce size rules. Runs in your browser for basic resize jobs.
How to use the Image Resizer
1) Drop an image.
2) Set width/height or presets.
3) Preserve aspect ratio unless you intentionally crop elsewhere.
4) Download and verify pixels in your design tool if critical.
Intermediate
Formula & worked example
Output dimensions = the width/height you set (aspect lock may compute the other side).
Practical rule: never upscale soft sources more than you must; start from the largest clean original.
Advanced
Interpretation, edge cases & next steps
Serving 4000px heroes into 800px slots wastes bandwidth even after compress.
Advanced: resize before heavy compression; crop for composition separately; stay within stated file limits.
Browser-local — see privacy guides.
Go deeper: Browser-Local Tools vs Upload Suites
Frequently asked questions
Do you upload my images?
No — designed for in-browser processing.
Can I upscale?
You can set larger dimensions, but detail will not magically appear.
Aspect ratio?
Lock aspect unless you want distortion or plan to crop.
Batch?
Follow on-screen batch limits.
Next step?
Often compress or convert after resize.
Deep guide
Read the full guide
Longer teaching, worked scenarios and mistakes — then jump back into this tool with example numbers.