Resize an Image — Free & Private
Drop in a PNG, JPEG, or WebP image, set the dimensions you need, and download the result. Everything runs in your browser — nothing is uploaded.
Why resize an image?
Most platforms expect an exact pixel size — a social network cropping your upload, an email client rejecting anything too wide, a CMS with a fixed banner slot. Resizing to the right dimensions upfront avoids ugly auto-cropping and keeps your page fast: a 4000px photo displayed at 400px wide is many times heavier than it needs to be, which hurts load time and Core Web Vitals for no visual benefit.
Common image sizes
| Use case | Recommended size (px) |
|---|---|
| Open Graph / social share image | 1200 × 630 |
| Instagram square post | 1080 × 1080 |
| Profile picture / avatar | 400 × 400 |
| Blog thumbnail | 600 × 338 |
| Email header banner | 600 × 200 |
Frequently Asked Questions
Does this upload my image to a server?
No. The resize happens entirely in your browser using the Canvas API. Your image is never uploaded or transmitted anywhere.
What image formats are supported?
You can resize PNG, JPEG, and WebP images, and export the result as PNG, JPEG, or WebP regardless of the original format.
Is there a file size or dimension limit?
No hard limit — since processing happens locally, the only constraint is your device's available memory. Very large images (50MP+) may be slower to process.
Will resizing reduce image quality?
Shrinking an image preserves quality well. Enlarging an image beyond its original resolution can introduce blurriness, since no new detail is created.
Can I resize images automatically, without a browser?
Yes — the free Image Tools API lets you resize images from a script, backend job, or AI agent, with the same logic that powers this page.
Need to capture a webpage too?
Full Page Capture exports any webpage as a screenshot or PDF — then resize or compress it right here.