Image Resizer — Free Online Resize to Exact Pixels
Upload an image, set the width and height, lock the aspect ratio, and download as PNG, JPEG, or WebP. Free, no signup, runs in your browser.
Upload Image
Drag & drop or click to upload
JPG, PNG, GIF, WebP
What the Image Resizer Does
The Image Resizer changes an image's pixel dimensions and lets you save it in the format you need. Upload a JPG, PNG, GIF, or WebP, type the target width and height, and download — with the option to lock the aspect ratio so nothing gets stretched, and to output as PNG, JPEG, or WebP.
It's the quick everyday tool for getting an image to an exact size — a 1080×1080 social post, an 800×800 product photo, a 1280×720 thumbnail — without opening heavy editing software. Everything runs in your browser, so your image is never uploaded and stays private.
Why Resizing Matters
Oversized images are one of the most common causes of slow pages, and page speed is a confirmed Google ranking signal. Serving an image at the size it's actually displayed — rather than a giant original scaled down by the browser — improves Core Web Vitals, cuts bandwidth and hosting costs, and gives mobile visitors a faster experience. For e-commerce, faster product images tend to mean lower bounce rates and better conversion.
Step-by-Step
Upload an image
Drag in or choose a JPG, PNG, GIF, or WebP. The preview and original size appear.
Set width and height
Enter the dimensions you want, in pixels.
Lock the aspect ratio
Keep it on to preserve proportions — change one dimension and the other follows.
Pick format & quality
Choose PNG, JPEG, or WebP; a quality slider appears for JPEG and WebP.
Resize & download
Click the button and the resized file saves to your device.
PNG vs JPEG vs WebP
PNG is lossless and supports transparency — best for logos, icons, screenshots, and anything with text or sharp edges. JPEG uses lossy compression and is best for photographs, where small file size matters more than perfect pixels. WebP is the modern option, typically 25–35% smaller than JPEG at similar quality and supported by all current browsers — the best all-round choice for web images.
Best Sizes for Popular Platforms
| Platform | Recommended Size | Format |
|---|---|---|
| 📸 Instagram Post | 1080 × 1080 | JPEG / WebP |
| 📘 Facebook Cover | 820 × 312 | JPEG |
| 📝 Blog Featured Image | 1200 × 628 | JPEG / WebP |
| ▶️ YouTube Thumbnail | 1280 × 720 | JPEG |
| 🌐 Website Logo | 250 × 100 | PNG |
| 🛒 Product Photo | 800 × 800 | JPEG / WebP |
Tips for Resizing Without Losing Quality
Resize down, not up — enlarging a small image adds pixels that weren't there and looks blurry. Keep the aspect ratio locked to avoid stretching. Use WebP for web for the best quality-to-size ratio, and PNG for text, logos, or sharp edges to avoid JPEG artifacts. Always work from a high-resolution copy and keep your original untouched.
Features
Exact Dimensions
Resize to any pixel width and height.
Aspect Lock
Keep proportions so nothing is stretched.
3 Output Formats
Save as PNG, JPEG, or WebP.
Quality Control
Adjust compression for JPEG and WebP.
100% Private
Resizing runs in your browser — nothing uploaded.
Free & Instant
No signup, no watermark, on any device.