Image Resizer
Resize your images with a high-quality algorithm. Supports JPEG, PNG, and WebP. Maintain aspect ratio and control compression quality.
Supported formats: JPEG, PNG, WebP • Max size: 50 MB
Did you know?
- Resizing uses a high-quality algorithm (Lanczos3)
- For JPEG, 85-95% quality offers a good size/quality balance
- WebP generally offers better compression than JPEG
- All operations are performed locally in your browser
Image Resizer: Resize Images Online for Free
The Image Resizer is a free online tool to resize images instantly in your browser. Whether you need to optimize images for web, prepare photos for social media, or reduce file sizes for email, this tool handles PNG, JPEG, and WebP formats with precise control over dimensions and quality.
Unlike other online tools, your images never leave your browser. All processing happens locally using modern web APIs, ensuring complete privacy for your photos. Resize single images or batch process multiple files at once.
💡 Why Resize Images?
Large images slow down websites, exceed email attachment limits, and consume unnecessary storage. Proper image sizing is crucial for web performance (faster page loads, better SEO) and practical use (meeting size requirements for uploads).
This tool gives you precise control over output dimensions while maintaining aspect ratio. Choose between percentage scaling or exact pixel dimensions, and adjust JPEG quality to balance file size and visual quality.
🎯 Typical Use Case:
You need to add product images to your e-commerce site. The photos from your camera are 5000×3000 pixels and 8MB each. You resize them to 1200×720 at 85% quality, reducing each to under 200KB while maintaining visual quality.
🔧 Practical Use Cases
🌐 Web Optimization
Resize images to appropriate web sizes. Most websites don't need images larger than 1920px wide.
5000×3000 → 1920×1152 (62% smaller file)
📱 Social Media
Prepare images for specific platform requirements.
Instagram: 1080×1080, Twitter: 1200×675
📧 Email Attachments
Reduce image sizes to meet email attachment limits.
8MB photo → 500KB for email (under 25MB limit)
🖼️ Thumbnail Generation
Create consistent thumbnail sizes for galleries or listings.
Various sizes → 300×200 thumbnails
✨ Features
🔒 100% Private
Images processed locally. Nothing uploaded to any server.
📐 Aspect Ratio Lock
Maintain proportions or set custom dimensions.
⚡ Quality Control
Adjust JPEG quality to balance size and visual fidelity.
📁 Multiple Formats
Support for PNG, JPEG, and WebP input and output.
📦 Batch Processing
Resize multiple images at once with same settings.
👁️ Live Preview
See results before downloading.
❓ Frequently Asked Questions (FAQ)
What's the best quality setting for JPEG?
For web use, 80-85% quality offers the best balance of file size and visual quality. Most people can't distinguish between 85% and 100%, but file sizes can be 2-3x smaller. For archival purposes, use 95-100%.
Should I use PNG, JPEG, or WebP?
JPEG: Best for photos. Lossy compression, smallest file sizes.
PNG: Best for graphics, screenshots, or when transparency is needed. Lossless.
WebP: Modern format with best compression. Use for web if browser support isn't a concern.
Will resizing reduce image quality?
Reducing size is generally safe - you're simply using fewer pixels. Enlarging images can cause blur or pixelation since the tool must interpolate new pixels. For best results, always work from the largest original.