↔️ Free · Instant · Aspect Ratio Preserved
Resize Images Online Free
Resize JPG, PNG, and WebP images by exact pixels, percentage, max width, or max height. Aspect ratio preserved automatically. No signup required.
Ready to Resize Your Images?
Upload your image and set your desired dimensions. Original file is not modified.
Open Image ResizerHow to Resize Images Online
- Upload your image. Drag and drop or click to select a JPG, PNG, or WebP file up to 20 MB.
- Choose resize method. Select from four options: resize by percentage, set a max width, set a max height, or enter exact pixel dimensions.
- Download the resized image. Click Resize, then download your new image. The original remains unchanged.
Resize Methods Explained
| Method | How It Works | Best For |
|---|---|---|
| By Percentage | Scale the image to a % of its original size (e.g., 50% = half size) | Quick proportional scaling |
| Max Width | Set a maximum width in pixels. Height scales proportionally. | Fitting images into web layouts |
| Max Height | Set a maximum height in pixels. Width scales proportionally. | Email signatures, thumbnails |
| Exact Dimensions | Set both width and height in pixels. | Social media images, specific requirements |
Common Image Sizes for Social Media
| Platform | Image Type | Recommended Size |
|---|---|---|
| Square post | 1080 × 1080 px | |
| Story / Reel | 1080 × 1920 px | |
| Post image | 1200 × 630 px | |
| Twitter / X | Post image | 1200 × 675 px |
| Post image | 1200 × 627 px | |
| YouTube | Thumbnail | 1280 × 720 px |
| Pin | 1000 × 1500 px |
Why Resize Before Uploading?
- Faster page loads. A 4000px photo displayed at 800px wastes bandwidth. Resizing first can reduce file size by 75%+ before any compression.
- Better Core Web Vitals. Properly sized images improve Largest Contentful Paint (LCP) scores, which affects Google rankings.
- Smaller email attachments. Resize photos to 1600px wide before emailing — plenty of detail at a fraction of the file size.
- Social media compliance. Each platform has ideal image dimensions. Uploading the right size ensures your images display perfectly.
Frequently Asked Questions
Does resizing reduce quality?
Downscaling (making smaller) generally maintains excellent quality. Upscaling (making larger) can introduce blurriness since the tool must generate new pixels. For best results, avoid enlarging images beyond their original dimensions.
Is the aspect ratio preserved?
Yes, by default. When you set a max width or max height, the other dimension adjusts proportionally. When using exact dimensions, both values are applied as specified.