Resize Images
Resize by exact pixels, by percent, or fit-to-longest-side. Works on JPG, PNG, WEBP, AVIF, HEIC. Batch supported.
Drop images here
or click to browse
Which mode should I use?
- Fit longest side — best default. Maintains aspect ratio. Caps the long side at the size you set, scales the other side proportionally.
- Percent — 50% halves both dimensions. Quick way to roughly quarter the file size.
- Exact pixels — precise width and height. May distort if your aspect ratio doesn't match.
Common target sizes
- 4K display: 3840 longest side
- Full HD / 1080p: 1920
- Email attachment: 1280 or smaller
- Forum / thumbnail: 800 or 600
- Avatar: 256 or 512