Image Resizer for JPG, PNG & WebP — Core Format
FREE IMAGE RESIZER
Online Image Resizer
Resize JPG, PNG, and WebP images to exact pixel dimensions or by percentage directly in your browser. Maintain aspect ratio, prevent distortion, and download in batches.
Select images to resize
Drag and drop JPG, PNG, or WebP files here, or choose from device.
Up to 50 files, 40 MB each; 200 MB per batch.
Maximum 40 megapixels and 12,000 pixels per side.
Processed 100% locally in your browser. No files are uploaded to any server.
Ready to resize. Select images to begin.
How to resize images online
- Select your images: Drag and drop up to 50 JPG, PNG, or WebP files into the box, or click “Select Images”.
- Select sizing method: Choose “By Percentage” to scale down or scale up proportionally (e.g. 50%), or “Exact Pixels” to specify target width or height.
- Maintain aspect ratio: Keep “Maintain aspect ratio” checked so your photos scale proportionally without squishing or stretching.
- Compare & Download: Inspect before/after resolutions using “Compare” and save individual images or download all as a ZIP archive.
Common Web and Social Media Dimensions
| Platform / Use Case | Recommended Dimensions | Aspect Ratio |
|---|---|---|
| Instagram Square Post | 1080 × 1080 px | 1:1 |
| Instagram Story / Reel | 1080 × 1920 px | 9:16 |
| Twitter / X Post | 1200 × 675 px | 16:9 |
| Facebook Feed Image | 1200 × 630 px | 1.91:1 |
| YouTube Video Thumbnail | 1280 × 720 px (HD) | 16:9 |
| Full HD Banner / Wallpaper | 1920 × 1080 px | 16:9 |
| Website Blog Hero | 1200 × 800 px | 3:2 |
High-Fidelity Resizing with Zero Quality Bleed
Our client-side resizing engine uses HTML5 high-quality bicubic interpolation filters. When scaling down high-resolution camera photos, detail is preserved smoothly without producing jagged edges or moiré interference patterns.
Frequently Asked Questions
Will resizing stretch or distort my picture?
Not if “Maintain aspect ratio” is checked. The resizer computes the missing dimension automatically to maintain the exact visual proportions of your original shot.
What does “Do not enlarge” do?
If you specify a target width of 1200px and upload a 600px image, enabling this prevents the image from being artificially blown up, avoiding pixelation and blurriness.
Does resizing reduce file size?
Yes. Reducing the pixel count significantly cuts the total bytes needed to store the image, often decreasing file size by 50% to 90%.