Social Media Image Sizes 2026: Complete Cheat Sheet + Free Resizer

Nothing makes a polished profile look amateur faster than a stretched banner, a cropped-off logo or a pixelated thumbnail. Every platform has its own preferred dimensions, they change every year, and keeping track is a chore. This social media image sizes 2026 cheat sheet puts every important dimension in one place — and shows you how to resize images for social media online for free in seconds.

Why Exact Image Sizes Matter

Posting a random screenshot and hoping for the best costs you real engagement:

• The algorithm crops for you — and it crops badly. Faces get cut, text becomes unreadable, logos vanish.
• Blurry images get less reach — platforms compress aggressively; starting with the right dimensions and size minimizes quality loss.
• Consistency builds brand — when every post is crisp and correctly framed, your profile looks professionally managed.

Social Media Image Sizes Cheat Sheet (2026)

Instagram

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Square post | 1080 x 1080 | 1:1 | | Portrait post | 1080 x 1350 | 4:5 | | Story / Reel cover | 1080 x 1920 | 9:16 | | Profile photo | 320 x 320 | 1:1 |

Facebook

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Feed post (landscape) | 1200 x 630 | ~1.91:1 | | Cover photo | 820 x 312 | ~2.63:1 | | Profile photo | 170 x 170 | 1:1 | | Event cover | 1200 x 628 | ~1.91:1 |

X (Twitter)

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Feed image | 1200 x 675 | 16:9 | | Header photo | 1500 x 500 | 3:1 | | Profile photo | 400 x 400 | 1:1 |

LinkedIn

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Feed post (landscape) | 1200 x 627 | ~1.91:1 | | Profile banner | 1584 x 396 | 4:1 | | Profile photo | 400 x 400 | 1:1 | | Company page cover | 1128 x 191 | ~5.9:1 |

YouTube

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Thumbnail | 1280 x 720 | 16:9 | | Channel banner | 2560 x 1440 | 16:9 (safe area 1546 x 423) | | Channel profile | 800 x 800 | 1:1 |

TikTok

| Asset | Size (px) | Aspect ratio | | --- | --- | --- | | Video / photo post | 1080 x 1920 | 9:16 | | Profile photo | 200 x 200 | 1:1 |

Bookmark this section — when a platform updates dimensions, this table is the first thing to check.

How to Resize Images for Social Media Online for Free

You do not need Photoshop to hit these dimensions. The free Image Resizer for Social does it in three steps:

1. Upload your image — JPG, PNG or WebP, straight from your device.
2. Pick the platform preset — Instagram post, YouTube thumbnail, LinkedIn banner and more. The tool applies the exact 2026 dimensions for you.
3. Download — a perfectly sized file, ready to upload. No watermark, no signup.

For custom dimensions outside the presets — an odd banner size, a marketplace listing — the general image resizer accepts any width and height you type.

Resize and Compress: The One-Two Punch

Platforms re-compress every upload. Hand them a huge file and the double compression turns crisp graphics into mush. The fix is simple:

1. Resize to the exact target dimensions first — never rely on the platform to scale for you.
2. Then compress — the free image compressor strips excess weight from the file while keeping visual quality. A resized 1080 x 1350 post should typically land well under 500 KB.
3. Convert format if needed — PNG for graphics and text overlays, JPG for photos. The image converter switches formats in one click.

Smaller files also upload faster on mobile data — a quiet but real engagement boost, since slow uploads often get abandoned mid-post.

Quick Tips Before You Post

• Leave safe margins — keep text and faces away from the outer 10% of the image; cropping is rarely perfectly centered.
• Design at 2x — if a thumbnail needs 1280 x 720, design at 2560 x 1440 and resize down. Downscaling always looks sharper than upscaling.
• Check on a phone — 70% of social media viewing is mobile. What reads fine on a monitor can be illegible on a 6-inch screen.
• One image, many platforms — export a master at the largest size you need, then resize down per platform. Never upscale small images.
• Keep a naming system — "post-1080x1350.jpg" tells you instantly what the file is for next month.

Frequently Asked Questions

What is the best image size for Instagram posts in 2026?

Use 1080 x 1350 pixels for portrait feed posts (the format that takes maximum screen space) and 1080 x 1080 for square posts. Stories and Reels covers use 1080 x 1920.

What size is a YouTube thumbnail?

1280 x 720 pixels, 16:9 ratio, under 2 MB. The social image resizer has it as a one-click preset.

Can I resize a photo without losing quality?

Downscaling to the correct dimensions keeps images sharp. The quality killer is uploading oversized files that platforms compress again — so resize and compress before posting.

Is it free to resize images online?

Yes. All the resize and compress tools linked here are completely free, with no signup and no watermarks.

Does resizing work on iPhone and Android?

Yes. The tools run in your mobile browser — upload, pick a preset, download. No app install needed.

The Bottom Line

Right-sized images earn more clicks, and hitting those sizes takes under a minute: look up the dimensions in the cheat sheet above, upload to the free Image Resizer for Social or the general image resizer, then run the result through the image compressor. Sharp, fast-loading posts — every single time.