Image Resizer

Resize images to any dimension. SNS presets included — no server upload, instant processing in your browser.

Drag files here or click to upload

PNG, JPG, WebP, GIF, BMP, TIFF supported · Multiple files allowed

Frequently Asked Questions

Is there quality loss when resizing images?

We use the Lanczos3 algorithm for high-quality resizing. Upscaling may show slight quality reduction, while downscaling has virtually no visible loss. Choose PNG output for lossless saving.

What does 'keep aspect ratio' mean?

When enabled, entering only width or height will automatically calculate the other dimension to maintain the original image's proportions. This prevents distortion.

What are the recommended image sizes for social media?

Recommended sizes: Instagram Square 1080×1080, Instagram Story 1080×1920, Facebook Cover 820×312, YouTube Thumbnail 1280×720, X Header 1500×500. Use IMGLOO's presets for one-click sizing.