Image Resizer
Resize images by exact dimensions or percentage. Lock aspect ratio, use presets, and download instantly — all in your browser.
Free Online Image Resizer
Resize any image by specifying exact pixel dimensions or scaling by percentage. The aspect ratio lock ensures your image doesn't stretch or distort. Built-in presets cover common sizes for social media, web, and print. All processing happens in your browser — no image data is uploaded to any server.
Resize Modes
By Pixels lets you set exact width and height. With aspect ratio locked, changing one dimension automatically adjusts the other. By Percentage scales the image uniformly — enter 50 to halve the size, 200 to double it. Both modes produce a high-quality result using the browser's bilinear interpolation.
Common Image Sizes
Social media profile photos: 500×500 or 1080×1080. Instagram posts: 1080×1080 (square) or 1080×1350 (portrait). Twitter/X header: 1500×500. Facebook cover: 820×312. Web thumbnails: 256×256. YouTube thumbnails: 1280×720. Full HD: 1920×1080.
Frequently Asked Questions
Downscaling (making smaller) preserves quality well. Upscaling (making larger) can cause blurriness since the browser must interpolate new pixels. For best upscaling results, avoid going beyond 2× the original size.
Yes. The aspect ratio lock is enabled by default (the lock icon between width and height). When locked, changing one dimension automatically adjusts the other to maintain proportions.