Resize Images Online — Free, No Upload
Change image dimensions instantly in your browser. QuickImageHub's resizer supports pixel-based, percentage-based, and social media preset resizing for JPG, PNG, WEBP, and HEIC images. All processing uses the Canvas API — your files never leave your device.
Social Media Image Size Presets
| Platform | Dimension | Use Case |
|---|---|---|
| Instagram Post | 1080 × 1080 | Square feed post |
| Twitter/X Post | 1200 × 675 | Timeline image |
| OG Image | 1200 × 630 | Link preview (Facebook, Slack) |
| YouTube Thumbnail | 1280 × 720 | Video thumbnail |
How Image Resizing Works
The browser's Canvas API redraws the image at the target dimensions using bicubic interpolation. Downscaling preserves quality well. Upscaling beyond 150% of the original size can cause blurriness.
Aspect Ratio Lock
By default, the aspect ratio is locked — changing width automatically adjusts height. Unlock it when you need a specific crop, like converting a landscape photo to a square Instagram post.