What this tool does
Image Resizer changes image dimensions in the browser and exports a resized copy for web, email, documents, or upload limits.
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🖼️ Image Resizer
Resize images by exact dimensions, percentage, or common presets. Everything runs locally in your browser.
Why it is useful
It helps create smaller images, consistent thumbnails, profile pictures, product photos, and web assets without installing an editor.
How it works
The selected image is loaded into a browser canvas, scaled to the requested dimensions, and exported as a new file.
Best input
Use web images, screenshots, or photos where resized output is acceptable. Keep originals when quality matters.
Privacy note
Resizing happens locally in your browser.
Important limitation
Upscaling cannot add real detail. Resizing may remove metadata and can reduce quality depending on export settings.
Quick answers
Should I preserve aspect ratio?
Usually yes. Distorting aspect ratio can make photos and logos look stretched.
What size is best for web?
Use the smallest dimensions that still look sharp in the final layout.
Common Use Cases
Resize product photos for a marketplace
Load a large camera image, pick a marketplace-safe width, keep aspect ratio locked, and export a smaller WebP before upload.
Prepare a YouTube thumbnail draft
Use the 1280×720 preset to quickly check whether a source image works in a standard thumbnail frame.
Create lighter email campaign images
Scale oversized screenshots down and lower export quality until the file is small enough for email without opening a full editor.
Image Toolkit workflow
Move between compressing, resizing, converting, cropping, encoding, favicon generation, resolution math, and palette extraction while keeping image pixels local to the browser.