Free Image Resizer Online
Resize any image to exact pixel dimensions. Upload, set your width and height, choose format, and download. Maintains aspect ratio option included. 100% browser-based.
📐
Click to upload or drag & drop
JPEG · PNG · WebP · Max 20MB
JPEG · PNG · WebP · Max 20MB
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How to Resize an Image Online for Free
Our free image resizer lets you change any image to exact pixel dimensions. Upload your image, enter the width and height you need, select the output format, and download. The aspect ratio lock ensures your image doesn't stretch or distort — it scales proportionally.
💡 Tip: Enter just the width and keep the aspect ratio lock on. The height will calculate automatically so your image scales perfectly without distortion.
Common Image Sizes for Different Platforms
| Platform / Use | Recommended Size | Format |
|---|---|---|
| Instagram post (square) | 1080 × 1080 px | JPEG |
| Instagram story | 1080 × 1920 px | JPEG |
| Twitter / X post | 1200 × 675 px | JPEG |
| Facebook cover photo | 820 × 312 px | JPEG |
| LinkedIn profile picture | 400 × 400 px | JPEG or PNG |
| YouTube thumbnail | 1280 × 720 px | JPEG |
| Website hero image | 1920 × 1080 px | WebP or JPEG |
| Email signature logo | 200 × 80 px | PNG |
| WhatsApp profile | 500 × 500 px | JPEG |
| WordPress featured image | 1200 × 630 px | WebP or JPEG |
Resize Image for Passport and ID Photos
UK passport photos must be 35mm × 45mm at 600 DPI, which equals 827 × 1063 pixels. Many official forms require specific photo dimensions. Use our resizer to prepare correctly sized photos before printing or uploading.
Frequently Asked Questions
Will resizing reduce image quality? +
Making an image smaller (downscaling) doesn't significantly reduce quality — the process simply removes pixels intelligently. Making an image larger (upscaling) can reduce quality because pixels are invented rather than captured. For upscaling, use specialist AI upscaling tools. Our resizer is best for downscaling.
How do I resize an image to under 1MB? +
Resize to no wider than 1200px, then use our Image Compressor at 75–80% quality. Most photos resized to 1200px wide and compressed at 80% JPEG are between 100–400KB — well under 1MB.
What does aspect ratio mean? +
Aspect ratio is the proportional relationship between width and height. A 16:9 ratio means the image is 16 units wide for every 9 units tall. Keeping the aspect ratio locked when resizing prevents stretching and distortion.
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