Resize images to any dimensions with aspect ratio lock. Download resized images. Everything runs in your browser. Free tool. This tool runs entirely in your browser — no data is sent to any server. It's fast, free, and works on any device.
Image resizing is one of the most common tasks in web development, social media management, and digital content creation. Uploading a 4000×3000 photo directly to a webpage wastes bandwidth and slows loading — resizing to 1200×900 can reduce file size by 80%+. This tool resizes images using the browser's Canvas API with high-quality bicubic interpolation, preserving sharpness even at significant size reductions. It supports all common formats (JPEG, PNG, WebP) and maintains aspect ratio to prevent distortion. Common resizing needs: website images (1200-2000px wide), social media (platform-specific sizes), email (max 600px wide), and thumbnails (150-300px).
Downscaling (making smaller) generally maintains quality. Upscaling (making larger) degrades quality as the computer must invent pixels. For best results, always start from the highest resolution source.
Full-width hero images: 1920px wide. Content images: 800-1200px. Thumbnails: 200-400px. Always provide 2x size for Retina displays. Use srcset for responsive images that serve appropriate sizes.
JPEG for photographs (smaller files, lossy). PNG for graphics with transparency or sharp edges. WebP for best compression of both types (25-35% smaller than JPEG). Prefer WebP with fallbacks for maximum compatibility.
Instagram post: 1080×1080 (square) or 1080×1350 (portrait). Facebook: 1200×630. Twitter: 1200×675. LinkedIn: 1200×627. YouTube thumbnail: 1280×720. This tool can target any exact dimensions.
This browser-based tool strips EXIF data during the Canvas processing. If you need to preserve EXIF (camera info, GPS), use a desktop tool. For web usage, stripping EXIF is often preferred for privacy (removes location data).