Image Resizer

Resize by pixels, percentage or social presets — live preview, batch support, ZIP download

Upload Images

Drag & drop images here
or browse files

JPG · PNG · WebP · GIF · AVIF | up to 20 MB each

Resize Settings

Resize Mode

Dimensions

Width (px)

Height (px)

—

Output Format

Live Preview

No image

Upload an image to see the live preview

Social Media Image Size Guide 2025

Platform	Type	Dimensions	Notes
Instagram	Post (Square)	1080 × 1080 px	Most popular format
Instagram	Portrait / Story / Reel	1080 × 1350 / 1920 px	Story fills the screen
Facebook	Post / Link Preview	1200 × 630 px	1.91:1 ratio
Twitter / X	In-feed image	1200 × 675 px	16:9 ratio
LinkedIn	Post image	1200 × 627 px	~1.91:1 ratio
YouTube	Thumbnail	1280 × 720 px	Minimum 640 px wide
Pinterest	Standard Pin	1000 × 1500 px	2:3 ratio ideal
WhatsApp	Profile Photo	800 × 800 px	Displayed as circle

Why Resize Images?

Faster page loads — oversized images are the #1 cause of slow sites
Better SEO — Core Web Vitals rewards smaller, correctly-sized images
Social media — each platform crops or compresses wrong-sized uploads
Storage savings — smaller files mean lower hosting and CDN costs
Email-friendly — most clients block images over 1 MB

Format Guide

JPEG — best for photos; lossy but tiny file sizes
PNG — supports transparency; larger but lossless
WebP — modern format; 25–35% smaller than JPEG at the same quality; supported by all modern browsers
GIF — only for simple animations; 256 colours max

For most web use, resize to target dimensions then export as WebP at 85% quality for the best size/quality balance.

Frequently Asked Questions

Will resizing reduce image quality?

Downscaling (making smaller) produces clean results with minimal quality loss, especially at 85%+ quality. Upscaling interpolates new pixels and can soften details — for large upscales use our AI Image Upscaler instead.

Are my images uploaded to a server?

No. All processing happens entirely in your browser using the HTML5 Canvas API. Your files never leave your device.

Can I resize multiple images at once?

Yes — select multiple files from the picker or drag several at once. All images are resized with the same settings and can be downloaded as a single ZIP file.

What is the aspect ratio lock?

The chain icon between Width and Height keeps the original proportions. When locked, changing one dimension automatically calculates the other so the image doesn't appear stretched or squashed.