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Supports PNG, JPEG, WebP, GIF, BMP
Image Resize
ImageResize images by dragging handles or entering exact dimensions. Aspect ratio lock, percentage scaling, and social media presets.
Why resize images?
Images rarely come in the exact dimensions you need. Profile photos need to be square, social media posts require specific aspect ratios, and web performance depends on serving appropriately sized images. Uploading a 4000px wide photo as a blog thumbnail wastes bandwidth and slows page loads. Resizing gives you pixel-perfect control over image dimensions while maintaining visual quality through high-quality downsampling algorithms.
Resize vs crop vs scale
Resizing changes the overall dimensions of an image. Cropping selects a rectangular sub-region and discards the rest. Scaling adjusts dimensions by a percentage. This tool combines all three concepts: you can enter exact pixel dimensions (resize), use percentage buttons (scale), and choose fit modes that determine how the image fills the target area. Contain mode adds padding, Cover mode fills and clips overflow, and Stretch deforms the image to match exact dimensions.
Image resizing for web performance
Serving images at the correct size is one of the most impactful web performance optimizations. A 3840x2160 hero image displayed at 800px wide forces the browser to download 8x more data than needed. Use this tool to create properly sized versions for different breakpoints and contexts. The social media presets make it easy to prepare images for Instagram (1080x1080), Twitter/X (1200x675), LinkedIn (1200x627), YouTube thumbnails (1280x720), and more — all without installing desktop software.
Frequently Asked Questions
What is the difference between resize and crop?
Resize changes the entire image to new dimensions, potentially altering the aspect ratio if unlocked. Crop selects a rectangular area and discards everything outside it. Use our Image Crop tool for cropping, or this Image Resize tool for dimension changes.
What are fit modes?
Stretch fills the exact target dimensions, potentially distorting the image. Contain fits the image within the target area and adds padding (with your chosen background color) to fill remaining space. Cover scales the image to completely fill the target area, clipping any overflow.
What output formats are available?
You can export as PNG (lossless, larger files), JPEG (lossy, good for photos), or WebP (modern format, best compression). JPEG and WebP include a quality slider to balance file size and visual fidelity.
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