Resize images online to exact pixel dimensions. Lock aspect ratio, use social media presets, or enter custom sizes — free, works in your browser.
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This utility is a high-performance node optimized for modern browser environments. All data processing is executed client-side, ensuring zero knowledge transfer to external servers.
Upload your image, enter the desired width and height in pixels (or choose a social media preset), and click Resize. Download the resized image instantly — no software or signup needed.
Instagram optimal sizes: Square post = 1080×1080px, Landscape = 1080×566px, Portrait = 1080×1350px, Story/Reel = 1080×1920px. Use the Instagram preset in the tool for automatic sizing.
Enable the 'Lock Aspect Ratio' toggle before resizing. This ensures the width and height maintain their proportional relationship, preventing distortion when you change one dimension.
Yes. The bulk resize feature lets you upload and resize multiple images to the same dimensions simultaneously — useful for batch processing product photos or social media content.
Resizing down (making smaller) generally maintains sharpness. Resizing up (making larger than original) will introduce some blurriness since the tool needs to create pixel data that doesn't exist.
YouTube thumbnails should be 1280×720px (16:9 aspect ratio) at minimum 72 DPI. File size must be under 2MB. JPG format works best for thumbnails.