Image Resizer
Free online image resizer. Resize PNG, JPG, WebP or GIF images by exact pixels or percentage — with aspect-ratio lock, format conversion and quality control, all in your browser.
Upload an image to resize
PNG, JPG, WebP, GIF — processed locally
How to use Image Resizer
- 1
Upload the image you want to resize (drag & drop or click).
- 2
Choose pixel dimensions or a percentage scale.
- 3
Pick the output format and quality, keeping the aspect-ratio lock on.
- 4
Download the resized image — the preview shows your exact savings.
Key features
Resize by exact pixels or percentage
Aspect-ratio lock for distortion-free scaling
Convert between PNG, JPEG and WebP
JPEG/WebP quality control
Live before/after preview with file-size savings
100% client-side — no upload limit, no server
Pro tip
For social media, resize to the platform's exact dimensions (e.g. 1200×630 for link shares) and export as WebP at 80% quality for the best speed/quality balance.
Image Resizer — FAQ
No — because the image never leaves your device, there is no server-side limit. Very large images may take a moment to process locally.
Yes — keep the aspect-ratio lock on and set just one dimension; the other is calculated automatically so nothing looks stretched.
WebP gives the smallest files for photos, JPEG is universally compatible, and PNG preserves transparency for logos and graphics.
No. Resizing happens locally in your browser using the Canvas API — your images stay on your device.
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