Resize Image

Resize an image to exact pixel dimensions or by percentage. Maintains aspect ratio by default. Browser-only — no upload.

Files stay in your browser. Nothing is uploaded.

1. Pick an image

2. Options

Resize mode

Percentage

50 = half size, 200 = double size. Only used in percentage mode.

Width (px)

Used in width mode and exact mode.

Height (px)

Used in height mode and exact mode.

Output format

Quality (for JPEG/WebP)

Value: 90

About this tool

Resize any image to a specific size or by percentage. Use percentage mode to scale uniformly (50% = half each dimension, area becomes one quarter). Use width or height mode to set one dimension and let the other follow proportionally — useful when fitting a profile photo to a 400px width slot or a banner to a 1920px width. Use exact mode only when you need a precise canvas size and accept that the image may distort if the aspect ratio differs. The resizer uses high-quality bicubic interpolation, so downscaled images stay sharp. Output format and quality are independent — pick WebP for the web, JPEG for compatibility, PNG for lossless.

Frequently asked questions

What does aspect ratio mean?

The ratio of width to height. Your phone photo might be 4:3 (4032 × 3024). If you set width to 1200 in width mode, height becomes 900 automatically — same ratio. Use exact mode only if you knowingly want to stretch.

Will my image look pixelated after resizing?

Downscaling (making smaller) almost always looks fine. Upscaling (making larger) loses detail — pixels are interpolated, not invented. For posters or prints from small photos, an AI upscaler is the only real fix.

What is a good size for social media?

Instagram square: 1080 × 1080. Twitter inline: 1600 × 900. Facebook share: 1200 × 630. LinkedIn cover: 1584 × 396. Most sites also accept larger and downscale automatically.

How big a file can I resize?

Modern browsers handle 100 megapixel images. Very large RAW files may run out of memory on phones with limited RAM. Try a smaller JPEG version if your image fails to load.