Pixora guide · Updated September 21, 2026
How to Resize Images for Social Media
Use sensible pixel dimensions and aspect ratios when preparing images for social posts, thumbnails and other platform workflows.
Resize an image →What this guide covers
This guide focuses on the practical decisions behind image editing: pixel dimensions, file formats, compression settings, browser support and the final destination of the image. The goal is to help you choose a workflow based on the actual requirement rather than simply producing the smallest possible file.
Why dimensions matter
Social platforms display images in defined layouts. An image with the wrong aspect ratio may be cropped by the platform or may leave unwanted space around the subject. Resizing alone does not change the composition, so check whether the destination needs cropping as well.
Useful starting presets
Pixora includes an Instagram Square preset of 1080 × 1080, an Instagram Portrait preset of 1080 × 1350 and a YouTube Thumbnail preset of 1280 × 720. These are practical starting points, not a guarantee that every placement on a platform uses the same dimensions.
Keep proportions when appropriate
The aspect-ratio lock prevents accidental stretching when you enter custom dimensions. If the platform requires a fixed ratio, you may need a separate crop step to change the composition before resizing.
Check text and faces
After resizing, inspect small text, logos and faces. Downscaling can make thin lines or small typography harder to read. If a graphic contains text, create the source at a sufficiently large resolution before making the final version.
Prepare a platform-specific copy
Keep your high-resolution original and export a copy for each destination. This avoids repeatedly resizing the same already-reduced file and gives you more control when a platform changes its requirements.