Social Media Image Resizer

Why Image Size Matters on Social Media

Every social media platform compresses and crops uploaded images to fit its layout. If your original image does not match the platform's required dimensions, it will be auto-cropped — often cutting off text, logos, or important parts of the image. Uploading correctly sized images ensures your content appears exactly as intended.

Correctly sized images also load faster, look sharper (no upscaling blur), and get better engagement. Platforms like Instagram and LinkedIn penalise low-quality uploads in their algorithms, so using the right dimensions helps your post reach more people.

Complete Social Media Image Size Reference (2025)

How to Choose the Right Preset

1. Select the platform — Choose from Instagram, Facebook, Twitter/X, LinkedIn, YouTube, Pinterest, TikTok, or WhatsApp.
2. Pick the format — Each platform has multiple formats: post, story, cover, profile, banner, etc. Choose the one matching your use case.
3. Upload your image — Drag and drop or click to select. The image is processed entirely in your browser — nothing is uploaded to any server.
4. Position and download — Drag to reposition the visible area, then download as PNG or JPEG.

Understanding Aspect Ratios

An aspect ratio describes the proportional relationship between an image's width and height. Common ratios include:

• 1:1 (Square): Equal width and height. Instagram's classic post format. Works well for product photos, portraits, and graphics.
• 4:5 (Portrait): Slightly taller than wide. Instagram's portrait format takes up more screen space in the feed, increasing visibility and engagement.
• 16:9 (Widescreen): Standard TV and video ratio. Used by YouTube, Twitter, and most landscape content.
• 9:16 (Vertical): Full phone screen. The standard for Stories, Reels, TikTok, and Shorts — optimised for mobile-first viewing.
• 2:3 (Tall): Pinterest's ideal ratio. Tall pins get more real estate in the Pinterest feed and perform better.

Image Format: PNG vs JPEG for Social Media

• JPEG (recommended for photos): Smaller file size, ideal for photographs, gradients, and images with many colours. Quality 85-90% is virtually indistinguishable from the original. Most social platforms re-compress to JPEG anyway, so uploading in JPEG avoids double compression.
• PNG (recommended for graphics): Lossless quality, supports transparency. Ideal for logos, text overlays, screenshots, and images with sharp edges. Larger file size — use only when quality preservation or transparency is needed.

Best Practices for Social Media Images

• Keep text in the safe zone: Platforms like Facebook and Instagram crop images differently on mobile vs desktop. Keep important text within the centre 80% of the image to avoid cropping on any device.
• Use high-contrast text: Text overlays should have sufficient contrast against the background. Use semi-transparent overlays behind text for readability — especially over photographs.
• Design for mobile first: Over 80% of social media consumption happens on phones. Test how your image looks at small sizes before posting.
• Consistent branding: Use the same colour palette, fonts, and logo placement across all platforms for brand recognition. Create templates for recurring content types.
• Avoid excessive text: Facebook and Instagram historically reduced reach for images containing more than 20% text. While this rule is less strict now, minimal text still performs better in engagement metrics.
• Upload at maximum resolution: Platforms compress images during upload. Starting with a higher-resolution source means the compressed version retains more quality.