Image Resizer - Free Online Tool to Resize & Compress Images

How to Use This Image Resizer

Step 1 — Upload: Drag and drop your image onto the upload area, or click “Choose File”. Supported formats include JPG, PNG, WebP, GIF, and BMP up to 20 MB.

Step 2 — Set dimensions: Enter a custom width and height in pixels. The lock icon keeps the aspect ratio intact — click it to unlock for freeform resizing. Or click a preset button to snap to a common size instantly.

Step 3 — Choose format and quality: Select JPEG, PNG, or WebP as the output format. Use the quality slider (10–100%) to balance file size against image clarity. PNG is lossless, so quality only affects JPEG and WebP.

Step 4 — Check sizes: The size panel shows the original file size, estimated output size, and how much space you save. The before/after preview lets you visually compare the result before downloading.

Step 5 — Download: Click “Download Resized Image” to save the result directly to your device.

Choosing the Right Format

JPEG is best for photographs and complex images. It uses lossy compression, so quality settings below 80% may introduce visible artifacts. For web use, 75–85% gives a good balance.

PNG is ideal for screenshots, graphics with text, logos, and images with transparency. It is lossless — no quality degradation — but produces larger files than JPEG.

WebP is Google’s modern format offering superior compression compared to both JPEG and PNG at equivalent quality. Supported by all major browsers, it is an excellent choice for web images.

Social Media Image Sizes (2025)

All presets above are built into the tool — just click the button and resize in one step.

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