Preparing Images for Social Media — Sizes, Formats, and Tips

Every social media platform has different image requirements — dimensions, file sizes, formats, and aspect ratios. Posting the wrong size means your images get cropped awkwardly, compressed heavily, or rejected entirely.

Platform Cheat Sheet (2026)

Instagram

Facebook

X (Twitter)

LinkedIn

Format Recommendations

• JPEG: Safest choice for all platforms — universally supported
• PNG: For graphics with text, screenshots, or images needing transparency
• WebP: Supported by most platforms now, but JPEG is still safer for maximum compatibility

Avoid uploading HEIC (most platforms re-encode it), BMP, or TIFF.

The Platform Optimization Feature

KoalaPic’s optimize_for parameter automatically resizes and formats images for specific platforms. Available via the web interface and API:

curl -X POST https://koalapic.com/api/v1/convert \
  -H "Authorization: Bearer kp_your_api_key" \
  -F "file=@photo.jpg" \
  -F "optimize_for=instagram_post"

This handles the cropping, resizing, and format selection in one step.

Tips for Better Social Media Images

1. Design at 2x: Create at 2160x2160 and let the platform downscale for retina screens
2. Keep text centered: All platforms crop edges differently — keep important content away from borders
3. Compress before uploading: Platforms re-compress everything. If you upload an already optimized image, the double compression is less destructive
4. Use the right aspect ratio: A landscape photo cropped to 1:1 for Instagram loses half the image. Shoot or crop intentionally.

Batch Processing for Social Media Managers

If you manage multiple platforms, use the batch API to generate all platform variants from one source image:

1. Upload the high-resolution original
2. Make multiple API calls with different optimize_for values
3. Download platform-ready images

Or use the resize tool on the web to manually adjust dimensions.

Next Steps

• Resize your images: KoalaPic Resize
• Try platform optimization: converter with platform presets
• Read about image compression before uploading