Every social media platform displays images at different dimensions, and uploading the wrong size leads to cropped thumbnails, blurry photos, and misaligned layouts. This guide lists the correct 2025 dimensions for every major platform and shows you how to resize images to match them in seconds.
Why image sizes matter on social media
When you upload an image that's the wrong size, the platform's server resizes it automatically. This almost always introduces compression artefacts and blurring. For profile photos and cover images especially, the platform crops to a specific aspect ratio — so if your image isn't that ratio, important content gets cut off.
Uploading at the correct dimensions means you control exactly what's visible, and the platform's resampling algorithm has less work to do, preserving quality.
2025 image size reference
- Square post: 1080 × 1080 px (1:1)
- Portrait post: 1080 × 1350 px (4:5) — maximum vertical size, best for feed visibility
- Landscape post: 1080 × 566 px (1.91:1)
- Story / Reel: 1080 × 1920 px (9:16)
- Profile photo: 320 × 320 px (displayed at 110 px on mobile)
Twitter / X
- In-feed image: 1200 × 675 px (16:9) or 1200 × 1200 px (1:1)
- Profile photo: 400 × 400 px
- Header / banner: 1500 × 500 px (3:1)
- Post image: 1200 × 627 px (1.91:1)
- Profile photo: 400 × 400 px
- Cover / banner: 1584 × 396 px (4:1)
- Company logo: 300 × 300 px
YouTube
- Thumbnail: 1280 × 720 px (16:9) — minimum 640 × 360 px
- Channel banner: 2560 × 1440 px (displays as 2560 × 423 px on desktop)
- Profile photo: 800 × 800 px
- Post image: 1200 × 630 px
- Profile photo: 170 × 170 px on desktop
- Cover photo: 851 × 315 px
- Event cover: 1920 × 1005 px
How to resize quickly using FreeImgKit
The Social Media Resizer on FreeImgKit includes presets for all the dimensions above. Upload your image, select the platform and format, and click Resize — the tool handles the maths and downloads the correctly sized file instantly. For custom dimensions not in the preset list, the Image Resizer lets you type any width and height with an optional aspect-ratio lock.
Keeping quality when resizing
Resizing always involves interpolation — the algorithm estimates what the new pixels should look like. Scaling down (making an image smaller) generally looks excellent. Scaling up (making an image larger) adds no new detail and can look blurry. Always start with a source image that's at least as large as your target dimensions. If you're shooting for Instagram, use the full resolution from your phone camera and then scale down — never shoot at reduced resolution and try to scale up later.
File format recommendations for social media
- Instagram: JPEG for photos, PNG for graphics with text or logos
- Twitter/X: JPEG or PNG — WebP is not accepted by the upload UI
- LinkedIn: JPEG or PNG
- YouTube thumbnails: JPEG or PNG
- Facebook: JPEG for photos works best — Facebook re-compresses uploads aggressively