Guides · Updated August 2026
How to Resize an Image to Exact Pixels
Most image resizing has a number attached: a website header wants 1200 pixels, a marketplace listing wants 1000, a form wants 800 across. The two mistakes to avoid are stretching (breaking the aspect ratio) and upscaling (enlarging a small image and expecting sharpness).
Step by step
- Open the resizer and choose your image — its current dimensions load automatically.
- Type the width OR the height you need; the other side follows automatically so nothing stretches.
- Choose the output: JPG for photos, PNG for graphics and screenshots, WebP for the smallest files.
- Resize, check the preview, download.
Tips that save a retry
- Downscaling is always crisp; upscaling can't add detail that was never captured.
- For a JPEG quality/size trade-off, the quality field gives you direct control — 80–90% is visually lossless for most photos.
- If a portal specifies kilobytes as well as pixels, use the photo-to-spec tool, which hits both at once.
Questions
Is my image uploaded to resize it?
No — resizing happens on your device, and the tool works offline once loaded.
How do I hit an exact file size in KB?
That's the photo-to-spec tool — it binary-searches the compression quality until the file lands inside your KB window.