Resize images online to exact pixel dimensions. Lock aspect ratio to avoid distortion — free and instant.
Drag & drop your image here
or click to browse
Supports PNG, JPG, WEBP, GIF
Resizing images to exact pixel dimensions is one of the most fundamental tasks in digital image management. Whether you're preparing product photos for an ecommerce store, creating social media content, or optimizing web assets for performance, our free image resizer gives you precise control over width and height — with optional aspect ratio locking to prevent distortion.
Unlike CSS scaling (which just stretches or shrinks the display without changing the actual file), true image resizing creates a new image at the target dimensions. This is critical for web performance: serving a 4000×3000px image that's displayed at 400×300px wastes 100x the bandwidth. Our resizer creates a new file at exactly the dimensions you need, dramatically reducing file size.
Use the preset buttons in the tool above, or reference this complete size chart:
| Platform & Format | Dimensions | Aspect Ratio |
|---|---|---|
| Instagram — Square Post | 1080 × 1080px | 1:1 |
| Instagram — Portrait Post | 1080 × 1350px | 4:5 |
| Instagram — Landscape Post | 1080 × 566px | 1.91:1 |
| Instagram — Story / Reel | 1080 × 1920px | 9:16 |
| Facebook — Post Image | 1200 × 630px | 1.91:1 |
| Facebook — Cover Photo | 820 × 312px | 2.63:1 |
| Twitter / X — Post Image | 1200 × 675px | 16:9 |
| Twitter / X — Header | 1500 × 500px | 3:1 |
| LinkedIn — Post Image | 1200 × 627px | 1.91:1 |
| LinkedIn — Banner | 1584 × 396px | 4:1 |
| YouTube — Thumbnail | 1280 × 720px | 16:9 |
| YouTube — Channel Banner | 2560 × 1440px | 16:9 |
| TikTok — Profile Picture | 200 × 200px | 1:1 |
| Pinterest — Standard Pin | 1000 × 1500px | 2:3 |
See detailed guides: Instagram · Facebook · Twitter · YouTube · TikTok · Pinterest
Resizing changes the overall dimensions of the image, scaling all content proportionally (or non-proportionally if aspect ratio is unlocked). Cropping cuts out a portion of the image, removing content from the edges. For social media, you often need both: resize to the right dimensions, then crop to focus on the subject. Use our image cropper after resizing for precise framing.
For ecommerce platforms, consistent image dimensions are critical for a professional appearance. Here are the recommended sizes:
Resizing reduces file size by reducing pixel count, but you can optimize further:
Upload your image by dragging and dropping or clicking the upload area.
Enter your desired width or height in pixels. Toggle aspect ratio lock to maintain proportions.
Preview the resized result instantly.
Click Download to save your resized image.
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