Image resizer

• Dimensions — type a width and/or height in pixels. Lock the aspect ratio to keep proportions, or untick to stretch.
• Scale — give a multiplier. 0.5 halves both dimensions, 2 doubles them.

Use dimensions when you have an exact target (e.g. 1200×630 for OG images); use scale when you want a relative reduction (e.g. 50% for a thumbnail).

• Resize before compressing — fewer pixels means less data even before lossy compression.
• Use 2× for Retina — if you display an image at 600px wide on a Retina screen, export at 1200px. Add srcset for multi-resolution.
• Don't upscale if you can avoid it — going from 200 to 800 adds blur, not detail.
• PNG for graphics, JPEG for photos — saves significant size for the right content type.

When to reach for it. Use it to downscale photos for the web, generate Retina (2×) variants, and hit a target dimension before upload.

When something else is better. For colour-managed print output or batch pipelines, a desktop editor or build script is the better fit.

The pitfall to watch. Upscaling adds blur, not detail; and forgetting to preserve aspect ratio stretches faces and logos.

Your file stays in your browser. The document or image you choose is read with the browser’s local file APIs and processed in the tab (or a Web Worker). EpitomeTool does not upload the file bytes, the file name, or the result — nothing leaves your device, so there is no “wait for upload” step and nothing to delete from a server afterwards.