Social Media Image Optimizer

Social Media Image Optimizer

Convert and optimize images for different uses with this social media image optimizer. Transform images between formats while maintaining quality.

When to Use This Tool

Optimizing images for social media platforms.

Key Benefits

• Proper dimensions
• Fast uploads
• Better quality posts
• Platform-optimized

Pro Tip

Each platform has ideal sizes: Instagram 1080x1080, Facebook 1200x630, Twitter 1200x675.

Supported Formats

Format	Best For	Supports
JPEG	Photos	Lossy compression
PNG	Graphics, screenshots	Transparency, lossless
WebP	Web images	Both lossy and transparency
GIF	Animations	Limited colors

Optimization Tips

1. Use JPEG for photos to reduce file size 2. Choose PNG when you need transparency 3. Consider WebP for modern browsers 4. Compress images before uploading to websites

Image Sizes by Platform

Every platform re-encodes what you upload, so the goal is to give it a clean source at the right aspect ratio rather than a maximally compressed file.

Platform	Dimensions	Ratio
Instagram square	1080 × 1080	1:1
Instagram portrait	1080 × 1350	4:5
Instagram story / Reel	1080 × 1920	9:16
X / Twitter post	1600 × 900	16:9
Facebook post	1200 × 630	1.91:1
LinkedIn post	1200 × 627	1.91:1
Open Graph preview	1200 × 630	1.91:1
YouTube thumbnail	1280 × 720	16:9

Upload at the platform's native dimensions. Anything larger is downscaled by their encoder, which is usually worse than downscaling it yourself, and anything smaller is upscaled and looks soft.

Keep important content away from the edges — every platform crops differently in feed previews, and a headline that touches the frame will lose a word.

Sizing Before Compressing

Resizing beats compressing. Halving an image's dimensions removes 75% of its pixels, which no quality setting can match, and a 4000px photo displayed at 800px is wasting 96% of what it downloads.

Displayed at	Serve (1×)	Serve (2× for retina)
400px	400px	800px
800px	800px	1600px
1200px	1200px	2400px

Above 2× there is no visible benefit on any current display, and the file size keeps rising.

Quality Settings That Hold Up

Setting	Looks	Use for
95–100	Indistinguishable, large	Masters and print
80–90	Very good	Hero images, product photography
70–80	Good	Most web content
50–70	Visible artefacts on detail	Thumbnails
Below 50	Obvious	Nothing

Around 75–85 is where the curve bends: below it quality falls quickly, above it file size rises quickly for no visible gain.

Everything Runs Locally

Conversion and compression here use a canvas in your own tab. No file is uploaded, nothing is stored, and the work continues offline once the page has loaded. That is worth knowing for anything containing faces, documents or unreleased work — most online image tools upload by necessity, because they process server-side.

Getting the Rest of the Win

• Serve modern formats with a fallback. with AVIF, then WebP, then JPG.
• Always set width and height. Without them the page reflows on load, which

Google measures as Cumulative Layout Shift.

• Lazy-load below the fold — and never the hero, since loading="lazy" on it delays

the exact element Largest Contentful Paint measures.

• Strip metadata. EXIF can carry GPS coordinates and adds weight to every copy.