What's the difference between aspect ratio and resolution?

Aspect ratio is the shape of the image — the ratio of width to height, like 1:1 (square) or 16:9 (widescreen) — independent of size. Resolution is the actual number of pixels, like 1080×1080. Two images can share an aspect ratio but have very different resolutions. For social media you need both right: the aspect ratio so the platform doesn't crop your subject, and the resolution so the image is crisp but not wastefully large.

What size should images be for Instagram?

For feed posts, use 1080×1080 for a square (1:1) or 1080×1350 for a portrait (4:5) — portrait takes up the most screen space in the feed. For Stories and Reels, use 1080×1920 (9:16, full screen). Uploading at these exact sizes avoids Instagram re-compressing or cropping your image and keeps it looking sharp. If your source is larger, downscale to these dimensions; don't upscale a smaller image to reach them.

How to Resize Images for Every Social Media Platform in 2026

You export a pixel-perfect graphic from Figma, upload it to a platform, and watch the algorithm mangle it. Facebook crops the top off a header. Instagram squeezes a wide landscape into an awkward letterbox. LinkedIn turns a crisp infographic into a blurry mess because it was exported at the wrong resolution.

Every platform runs aggressive compression to save bandwidth. If you don’t give their pipelines the aspect ratios and pixel sizes they expect, they crop, scale, and recompress your image for you — and quality drops.

This is the cheat sheet: the right dimensions for each platform, and the mechanics behind why resizing the wrong way hurts quality.

Stop memorizing pixel values. Drop your photo into our local Image Resizer and pick the platform preset (e.g., “Instagram 4:5 Portrait”). It handles the interpolation locally.

1. Aspect Ratio vs Resolution

Two concepts that get confused:

Aspect ratio (the shape): the proportion of width to height, written Width:Height. 1:1 is a square, 16:9 is a wide rectangle, 9:16 is a vertical phone screen.
Resolution (the pixel count): the number of pixels in that shape. A 1080x1080 image and a 4000x4000 image have the same 1:1 ratio, but the latter has far more pixels.

The rule: crop to the correct aspect ratio first, then resize to the recommended resolution. Never stretch an image into a new ratio — it warps the subject.

2. Platform Dimensions

A. Instagram

Instagram has moved past the 2012 square. The algorithm rewards posts that take up more vertical space.

Content Type	Dimensions (px)	Aspect Ratio	Notes
Feed (Portrait)	`1080 x 1350`	`4:5`	Best engagement — takes ~20% more screen space than a square.
Feed (Square)	`1080 x 1080`	`1:1`	The safe option; keeps your profile grid uniform.
Feed (Landscape)	`1080 x 566`	`1.91:1`	Avoid — takes minimal screen space.
Stories / Reels	`1080 x 1920`	`9:16`	Full vertical. Keep the bottom ~250px clear of the UI overlay.
Profile Picture	`320 x 320`	`1:1`	Uploaded square but cropped to a circle. Keep logos centered.

B. YouTube

The thumbnail matters more than the video for getting clicks. Size it wrong and YouTube downscales it, making your text illegible on mobile.

Content Type	Dimensions (px)	Aspect Ratio	Notes
Video Thumbnail	`1280 x 720`	`16:9`	Keep it under 2MB. Use high-contrast colors.
Channel Banner	`2560 x 1440`	`16:9`	Only the central `1546 x 423` “safe zone” shows on mobile — put logos and text there.
Profile Picture	`800 x 800`	`1:1`	Scales down small in comments. Keep it minimal.
Shorts	`1080 x 1920`	`9:16`	Vertical video.

C. LinkedIn

LinkedIn’s desktop UI uses wide banners, but its mobile cropping is aggressive.

Content Type	Dimensions (px)	Aspect Ratio	Notes
Shared Link (OG)	`1200 x 627`	`1.91:1`	Matches the web Open Graph standard.
Profile Banner	`1584 x 396`	`4:1`	Keep text centered to survive the mobile crop.
Company Banner	`1128 x 191`	`5.9:1`	Very wide. The logo overlays the far left — keep info away from it.
Carousel Slide	`1080 x 1080`	`1:1`	LinkedIn carousels are uploaded as multi-page PDFs, not image galleries.

D. X (Twitter)

The feed moves fast. If an image needs a “Show More” click, engagement is already gone.

Content Type	Dimensions (px)	Aspect Ratio	Notes
Single Image	`1600 x 900`	`16:9`	No cropping in the feed — the user sees the whole image.
Header Photo	`1500 x 500`	`3:1`	Accounts for the profile picture overlap in the bottom left.
Website Card (OG)	`1200 x 628`	`1.91:1`	Pulled from your page when someone shares the URL.

E. TikTok & Pinterest

Content Type	Dimensions (px)	Aspect Ratio	Notes
TikTok Video	`1080 x 1920`	`9:16`	Keep the right edge (icons) and bottom (captions) clear.
Pinterest Standard Pin	`1000 x 1500`	`2:3`	The ratio Pinterest’s grid prefers.
Pinterest Long Pin	`1000 x 2100`	`1:2.1`	The max vertical space before Pinterest truncates the pin.

3. Scaling: Upscaling vs Downscaling

Resizing an image is interpolation — the software recalculates pixels. The direction matters a lot.

Upscaling invents data

If you take a 500 x 500 logo and resize it up to 2000 x 2000, you’re asking the software to invent 3.75 million pixels that don’t exist. It guesses the missing colors with bicubic or nearest-neighbor interpolation, and the result is blurry. You can’t upscale a raster image without losing quality. Source the highest-resolution original (or a vector file) instead.

Downscaling is safe

Taking a 4000 x 4000 photo down to 1080 x 1080 is fine — the algorithm averages adjacent pixels, which actually sharpens the result and removes noise.

For best quality, your source should be about 2× the target resolution, so the downsample produces a crisp final image.

4. Format: JPEG vs PNG vs WebP

A common mistake is exporting photos as .PNG, assuming it “preserves quality.”

PNG (lossless): meant for logos, flat graphics, and images needing transparency. Save a photo as PNG and it’s 5–10MB. Upload that and the platform recompresses it hard to save bandwidth, adding artifacts and banding.
JPEG (lossy): meant for photos. Export at 85% quality and a photo drops to ~300KB with no visible loss. Because it’s already optimized, the platform barely touches it.
WebP (modern): PNG’s transparency and JPEG-like photo compression at ~30% smaller sizes. Great for your own website, though some scheduling tools (like Hootsuite) still reject WebP uploads.

5. The Workflow

Exporting six ratio variations by hand in Photoshop wastes time. A faster pipeline:

Start big: get the highest-resolution source from your designer.
Crop for the ratio: in the Image Cropper, pick the preset (16:9 for YouTube, 4:5 for Instagram) and align the subject to the rule-of-thirds grid.
Resize for the platform: in the Image Resizer, set the exact pixel size (e.g., 1280px wide).
Compress for delivery: run it through the Image Compressor at 85% quality. This keeps the file under the platform’s size limit so it doesn’t run its own destructive compression.

6. FAQ

Q: 72 DPI or 300 DPI for social uploads? A: DPI is a print measurement for ink density. Screens and social platforms ignore DPI metadata — they only care about pixel dimensions. A 1080x1080 image at 72 DPI and at 300 DPI look identical on Instagram.

Q: Why do my colors look washed out on Facebook? A: You probably exported in CMYK (a print color space). Browsers and social platforms use sRGB. Converting CMYK to sRGB on upload shifts the colors. Always export digital assets in sRGB.

Q: Can I upload SVGs directly? A: No. X, Instagram, and LinkedIn don’t allow SVG uploads (SVGs can carry embedded scripts). Rasterize vectors to high-resolution PNGs first.

Q: What is an Open Graph (OG) image? A: When you paste a URL into Slack, iMessage, or X, a preview card appears. Its image comes from your page’s <meta property="og:image" content="..." /> tag. The standard size is 1200 x 630 (a 1.91:1 ratio).

Q: Will platforms support WebP and AVIF? A: Many already do internally. But for compatibility across scheduling tools (Buffer, Sprout Social) and older APIs, JPEG is still the safest format for photo uploads.

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