Image Resizer Free Online

The recommended Instagram post size is 1080 x 1080 pixels (square). For landscape posts, use 1080 x 566 pixels, and for portrait posts, use 1080 x 1350 pixels. Instagram Stories require 1080 x 1920 pixels (9:16 aspect ratio).

YouTube thumbnails should be 1280 x 720 pixels with a 16:9 aspect ratio. The minimum width is 640 pixels. File size should be under 2MB. Use JPG, GIF, or PNG format for best results.

To minimize quality loss: (1) Start with the highest resolution source, (2) Downsize rather than upsize, (3) Use PNG for graphics with text, (4) Maintain aspect ratio to avoid stretching. Our tool preserves quality during resizing using browser's native image processing.

Aspect ratio is the proportional relationship between width and height (e.g., 16:9, 4:3, 1:1). Maintaining aspect ratio prevents images from looking stretched or squished. Lock aspect ratio when you want to resize proportionally.

Yes, completely free with no limitations or watermarks. All processing happens in your browser - your images are never uploaded to any server. This makes it safe for resizing sensitive or private images.

Our resizer supports JPEG/JPG, PNG, WebP, and GIF formats. The output maintains the original format. For best quality, use PNG for graphics with text and JPEG for photographs.

Facebook cover photos display at 820 x 312 pixels on desktop and 640 x 360 pixels on mobile. For best results, upload at 820 x 462 pixels to accommodate both views. Use JPG or PNG under 100KB for faster loading.

Currently, our tool resizes one image at a time for maximum control and preview capability. For batch resizing, you would need to process each image individually. We may add bulk processing in future updates.

File size in KB depends on compression, not just dimensions. To reduce KB: use our image compressor tool, reduce dimensions, or increase JPEG compression. Resizing dimensions alone may not achieve a specific KB target.

Twitter (X) header images should be 1500 x 500 pixels (3:1 aspect ratio). The safe area for important content is the center 1500 x 350 pixels, as edges may be cropped on mobile. File size should be under 5MB.

Enlarging (upscaling) images can reduce quality as the software must create new pixels. The result may look blurry or pixelated. For best quality, always start with the largest available source image and resize down.

LinkedIn background/banner images should be 1584 x 396 pixels. Personal profile backgrounds are 1584 x 396 pixels, while company page banners are 1128 x 191 pixels. Use high-contrast images as they display behind text.

Yes, our image resizer works on all devices including smartphones and tablets. It runs entirely in your browser, so no app download is needed. The responsive design adapts to your screen size.

For high-quality prints, use 300 DPI (dots per inch). Web images are typically 72 DPI. Our pixel-based resizer doesn't change DPI, but you can calculate required pixels: multiply inches by DPI (e.g., 4x6 inch at 300 DPI = 1200 x 1800 pixels).