Image Size Guide for Social Media in 2026
Every platform has its own ideal image dimensions, and uploading the wrong size means awkward cropping, soft rescaling, or a slow upload. Here's the 2026 size guide — plus the difference between resizing and compressing, which trips a lot of people up.
Resize vs compress — not the same thing
- Resizing changes the dimensions (pixels wide × tall) — that's what each platform specifies.
- Compressing changes the file size (KB/MB) without changing dimensions — that's what keeps uploads fast and quality high.
Best practice: crop/resize to the platform's dimensions in your photo editor, then compress the result so it uploads quickly and the platform doesn't re-crush it.
2026 image dimensions cheat sheet
| Platform | Image | Dimensions (px) |
|---|---|---|
| Square post | 1080 × 1080 | |
| Portrait post | 1080 × 1350 | |
| Instagram / stories | Story / Reel | 1080 × 1920 |
| Shared post | 1200 × 630 | |
| X (Twitter) | In-stream image | 1600 × 900 |
| Shared image | 1200 × 627 | |
| YouTube | Thumbnail | 1280 × 720 |
| Standard pin | 1000 × 1500 |
Platforms tweak recommended sizes over time; these are the widely-used 2026 values. When in doubt, match the aspect ratio and use the largest listed size.
Why compress after resizing
Even at the right dimensions, an exported image can be several megabytes. Compressing it:
- Uploads faster, especially from a phone.
- Gives the platform a smaller starting point, so its own re-compression does less damage.
- Saves data for you and your audience.
The workflow
- Crop to the platform's dimensions from the table above.
- Compress in the FreeCompressor image tool — Balanced preset is ideal for social.
- Upload.
For the reasoning behind quality settings, see compressing without losing quality.