Never upload a blurry or badly cropped image again. This free 2026 guide lists the exact image sizes for Instagram, YouTube, Facebook, X and Pinterest —
plus a handy aspect-ratio calculator that simplifies any width and height to a clean ratio like 16:9. Free to use, no signup needed.
Why Image Dimensions Matter More Than Ever
Every platform crops, compresses and displays your photos differently. Upload the wrong size and Instagram chops off your subject’s head, YouTube blurs your thumbnail, or Facebook serves a pixelated mess. Getting dimensions right before you upload is the difference between a crisp, professional look and an amateur one — and it takes seconds once you know the numbers.
Upload the Exact Size (Don’t Let Platforms Resize for You)
Social platforms recompress everything you upload, but starting from the recommended dimensions keeps you in control. When you upload a 1080px-wide image to Instagram, it stays 1080px — no surprise downscaling, no extra quality loss. Upload a 4000px photo instead and Instagram’s aggressive compression decides what survives. Rule of thumb: resize to the platform’s recommended size yourself, at 80–85% JPG quality, and the platform has nothing left to “fix.”
Aspect Ratios: The One Concept to Learn
An aspect ratio is just width divided by height — 16:9, 4:5, 1:1. It determines how your photo fits each slot. A 4:5 portrait fills an Instagram feed beautifully; the same photo posted as a story (9:16) gets cropped top and bottom. Before posting, check the ratio your slot needs and crop intentionally — use our calculator above to convert any dimensions to their clean ratio.
- 1:1 (square): Instagram feed posts, profile pictures. Safe everywhere.
- 4:5 (portrait): Instagram feed maximum — fills the most screen space.
- 9:16 (vertical): Stories, Reels, TikTok, YouTube Shorts. Full-screen phone format.
- 16:9 (landscape): YouTube thumbnails and video, X/Twitter in-stream images.
Platform Cheat Sheet for 2026
- Instagram post: 1080 × 1350 px (4:5 portrait) or 1080 × 1080 px (square).
- Instagram Story/Reel: 1080 × 1920 px (9:16).
- YouTube thumbnail: 1280 × 720 px (16:9). Under 2 MB.
- Facebook post: 1200 × 630 px for link shares; 1080 × 1350 px for portrait posts.
- X (Twitter): 1200 × 675 px (16:9) in-stream.
- Pinterest pin: 1000 × 1500 px (2:3 portrait).
Export Settings That Keep Photos Sharp
Size is only half the story — export settings matter too. Export at the exact pixel dimensions above, JPG quality 80–85% (or PNG for graphics with text), sRGB color profile, and sharpen lightly for screen. Avoid uploading PNG photos — they’re huge and platforms convert them to JPG anyway. After resizing, run the file through our image compressor to hit file-size limits without visible quality loss.
One Photo, Every Platform
Shoot and edit one high-resolution master, then export platform-specific copies from it — never re-crop an already-cropped export. Keep a simple folder structure (master.jpg, instagram-45.jpg, story-916.jpg, youtube-thumb.jpg) so you always know which file goes where. Five minutes of prep beats re-editing every time a platform changes its layout.
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✦How to Use
- Find your platform in the size guide above.
- Resize your photo to the recommended dimensions before uploading.
- Use the aspect-ratio calculator: enter width and height to get the clean ratio.
✦FAQs
What size is an Instagram post?
1080×1080 px square.
What is a YouTube thumbnail size?
1280×720 px.
How does the ratio calculator work?
Enter width and height; it simplifies to e.g. 16:9.
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