Uploading a wrongly-sized image gets you cropped, pixelated or rejected by social platforms. Here are the exact dimensions you need for every major platform — and the fastest way to resize.
The 2026 size cheat sheet
| Platform | Format | Pixels | Aspect ratio |
|---|---|---|---|
| Instagram Post | Square | 1080×1080 | 1:1 |
| Instagram Portrait | Portrait | 1080×1350 | 4:5 |
| Instagram Story | Story | 1080×1920 | 9:16 |
| YouTube Thumbnail | Thumb | 1280×720 | 16:9 |
| YouTube Banner | Banner | 2560×1440 | 16:9 |
| Facebook Cover | Cover | 851×315 | ~2.7:1 |
| Blog Header | Wide | 1200×630 | 1.9:1 |
| X/Twitter Post | Square | 1600×900 | 16:9 |
Resize in 3 clicks
- 1Open the Image Resizer.
- 2Upload your image and pick the preset (Instagram Post, Thumbnail, Cover…).
- 3Download the perfectly-sized file — no quality loss.
Need to crop instead? Use the Image Cropper for exact aspect-ratio crops.
Keep your images web-fast
After resizing, run the Image Compressor — target under 200KB per image for blog posts to keep your Core Web Vitals green. Use WEBP for maximum speed on the web.
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Common mistakes
- Uploading 4000px camera photos directly to social (slow uploads, auto-cropping)
- Upscaling small images instead of exporting at the right size
- Ignoring aspect ratio for feed aesthetics
- Using screenshots where 4:5 crops lose context
Instagram compresses images over 1080px wide — upload at exactly 1080px to control the compression.
FAQ
Does resizing reduce image quality?
Downscaling (making smaller) is quality-neutral. Upscaling adds no real detail — that's where our AI Image Upscaler helps by reconstructing detail.
What format should I use?
JPG for photos, PNG for graphics with transparency, WEBP for web content. Convert instantly with the Image Converter.