How to Resize Images to Custom Dimensions
Resize images to exact pixels, percentages, or print-style centimeter dimensions with a browser-based workflow.
Open the related CropYourImage tool
| Format | Width | Height | Notes |
|---|---|---|---|
| Website hero | 1600 | 900 | Good starting point for wide responsive headers. |
| Blog image | 1200 | 675 | Lightweight 16:9 content image. |
| Square asset | 1000 | 1000 | Reusable product, avatar, or card image. |
Quick answer
Preset tools are useful, but sometimes you need exact dimensions for a blog, CMS, email banner, marketplace listing, or developer handoff. Custom resizing lets you type the width and height directly instead of guessing with a crop handle.
Pixels are the best unit for websites and social platforms. Percentages are useful when you want a file that is half or quarter of the original size. Centimeters can help when a print workflow asks for physical dimensions, though final print quality still depends on resolution and DPI.
Locking the aspect ratio prevents accidental stretching. If you unlock it, make sure you are intentionally changing the shape, because distorted images can make products and portraits look unprofessional.
Recommended workflow
- Start with the largest clean source image you have.
- Choose the exact destination size before adding final text.
- Crop visually so the subject, logo, and key message stay inside the safe area.
- Export in JPG for photos, PNG for crisp graphics, or WebP for web use.
Checklist
- Use pixels for web publishing.
- Lock aspect ratio unless you need a new shape.
- Resize a copy of the original.
- Preview the output before downloading.