LinkedIn automatically re-compresses every image you upload — profile photos, post images, banners, and article covers. If your original file is already heavily compressed, LinkedIn's second pass of compression will make it look noticeably worse. Understanding how LinkedIn handles images lets you upload in a way that minimizes visible quality degradation.

How LinkedIn Re-Compresses Images

LinkedIn's servers process uploaded images to standardize file sizes across the platform. This processing:

Converts most images to JPEG regardless of the uploaded format
Applies its own JPEG compression (approximately 70–80% quality)
Resizes images to fit platform display limits

The key insight: uploading a pre-compressed JPEG (85%) and uploading a high-quality JPEG (95%) will look very different after LinkedIn's processing. The high-quality original gives LinkedIn more data to work with, resulting in a better final image. The already-compressed JPEG gets compressed again — double compression creates visible artifacts.

Best Format for LinkedIn Images

JPEG at 90–95%: best for photos — profile pictures, product shots, event photos. The high starting quality preserves details after LinkedIn's re-compression
PNG: better for graphics with text, logos, and screenshots. LinkedIn converts PNG to JPEG anyway, but PNG often gives a better conversion result than pre-JPEG'd graphics
Maximum upload: LinkedIn accepts up to 8 MB per image in posts and 5 MB for profile photos. Stay within these limits but upload the highest-quality version you have

Profile Photo Tips

Upload at 400×400 px minimum. 800×800 is better — gives LinkedIn downscaling data to work with, resulting in a sharper thumbnail
Square aspect ratio: LinkedIn crops to a circle for display but stores the full square. Upload a square-cropped photo for best results
Well-lit face, centered: LinkedIn's circle crop removes edges. Keep your face in the center with some space around it
Plain background: LinkedIn's JPEG compression preserves detail in the subject but muddles complex backgrounds. A plain background helps the final compressed result look professional

Post Image Compression Strategy

For LinkedIn post images, the goal is to upload an image that's large enough to survive LinkedIn's compression but not so large it's unnecessary:

Start with the original high-quality image (camera photo or exported at high quality)
Resize to 1200×628 px (the native LinkedIn post image size) using the image resizer
Use the image compressor to reduce file size to 500 KB–2 MB at 85–90% JPEG quality — this gives LinkedIn enough data without excessive upload size
Avoid compressing below 80% before uploading — double compression (your compression + LinkedIn's) will produce visible JPEG blocking artifacts

Why Your LinkedIn Images Look Blurry

The most common causes of blurry or degraded LinkedIn images:

Uploading a pre-compressed image: if you took the image from another website or already compressed it heavily, LinkedIn's second compression makes it worse
Uploading at the wrong dimensions: if a post image is 600×315 instead of 1200×628, LinkedIn upscales it before re-compressing — upscaling reveals pixelation
Using a screenshot instead of the original: screenshots are usually 72 DPI JPEG files. Upload the original image when possible
Text in images: JPEG compression is particularly harsh on text. Use PNG for images containing text, or convert your graphic to PNG before uploading

LinkedIn Image Size Quick Reference

Profile photo: 400×400 px minimum, upload 800×800 for best quality
Background banner: 1584×396 px
Post image: 1200×628 px
Article cover: 1200×627 px
Company banner: 1128×191 px

Compress Images for LinkedIn — Avoid Quality Loss When Uploading