Resize images to any custom dimension or common preset sizes instantly in your browser. Drag on the image to resize visually, or type exact pixel values for precise scaling. Live dimension overlay shows width and height as you adjust.
How to Use Image Resizer
- 1Upload your image by clicking or dragging it onto the upload area
- 2Enter the desired width and height in pixels, or pick a preset (HD, 4K, social media sizes)
- 3Toggle "Lock aspect ratio" to maintain proportions while scaling
- 4Drag directly on the preview image to resize it visually — the dimension overlay updates in real time
- 5The resized image file size is shown live — click "Download" to save as JPEG, PNG, or WebP
Features
- Live preview shows the image at the target size with proportional scaling
- Drag directly on the image to resize — moves horizontally and vertically with a dimension overlay badge
- Common presets: HD, Full HD, 4K, Instagram (1080×1080), Twitter/X header, Facebook cover
- Lock/unlock aspect ratio and download as JPEG, PNG, or WebP
- Resized file size shown alongside original in the info bar
- Auto-resize (debounced) generates the actual resampled image without extra clicks
- Processes locally — no server upload needed for any image resizing
Frequently Asked Questions
How does the drag-to-resize work?
Click and drag on the preview image. Dragging right/down increases size, left/up decreases. The direction (horizontal/vertical) is detected automatically from your initial mouse movement.
Will resizing reduce image quality?
Enlarging an image beyond its original size will reduce quality. Downscaling generally preserves quality well. For file size reduction, use the Image Compressor after resizing.
Can I resize to social media dimensions?
Yes. Common presets include Instagram (1080×1080), Facebook cover (820×312), Twitter/X header (1500×500), and more for social media-ready images.
What file formats can I resize?
You can resize JPEG, PNG, WebP, and most other image formats supported by your browser. Use the Image Converter if you need to convert formats.