Image Resizer
Easily resize images. Batch process multiple images, output as PNG/JPEG/WebP, adjust quality, and download all as ZIP. Browser-based processing for privacy.
Upload images, adjust the size, then click “Apply”.
What is Image Resizer?
Image Resizer is a tool that allows you to freely adjust the width and height of photos and graphics. You can specify exact dimensions in pixels or adjust the ratio by percentage.
All processing is done within your browser, so images are never sent to external servers, keeping your data safe. Batch processing for multiple images is also available.
When to Use This Tool
- Social Media Uploads – Convert images to the right size for Instagram, YouTube, Facebook, and other platforms
- Website Image Optimization – Reduce image sizes to improve page loading speed
- Email Attachments – Shrink image sizes to meet attachment limits
- Profile Pictures – Create square images suitable for social media profiles
- Print-Ready Images – Adjust to exact pixel dimensions for printing
- Bulk Image Processing – Convert multiple photos to the same size at once
Key Features
- Two Resize Modes – Choose between Pixels (exact size) or Percent (ratio adjustment)
- Aspect Ratio Lock/Unlock – Maintain original proportions or freely adjust width/height
- Multiple Output Formats – Choose from PNG (lossless), JPEG (size-optimized), or WebP (modern format)
- Quality Control – Adjust compression quality for JPEG and WebP to optimize file size
- File Size Estimation – Preview approximate output file size before resizing
- Batch Processing – Upload multiple images and process them all with the same settings
- Grid View Results – View processed images in a grid and download individually
- ZIP Download – Save all images at once in a single ZIP file
How to Use
- Upload Images – Click or drag and drop images to upload. Multiple files can be selected.
- Set Dimensions – Choose your preferred method (pixels or percent) and enter the desired size.
- Configure Output – Select a format (PNG, JPEG, or WebP) and adjust quality if needed.
- Click Apply – Press the “Apply” button to resize the images.
- Review Results – Processed images appear in a grid format showing the size reduction for each.
- Download – Use individual download buttons for specific images or “Download All” for a ZIP file.
Image Resizing Tips
Recommended Settings by Use Case
- Web Use – JPEG or WebP at 80-90% quality for a good balance of size and quality
- Transparent Backgrounds – PNG format required (JPEG doesn’t support transparency)
- High-Quality Archival – PNG format for lossless storage
- Minimum File Size – WebP format at 70-80% quality
Important Notes
- Quality Loss When Enlarging – Resizing larger than the original can cause blurring.
- Maintain Aspect Ratio – Free-form resizing may stretch or distort images.
- Backup Originals – Keep a copy of original images before resizing.
Frequently Asked Questions
Does resizing reduce image quality?
When reducing size, there’s minimal quality loss. However, enlarging images can cause blurring as pixels are stretched. We don’t recommend scaling images beyond their original dimensions.
Which format should I choose: PNG, JPEG, or WebP?
Choose PNG for transparent backgrounds, JPEG to reduce file size, or WebP for the best quality-to-size ratio in modern browsers. Generally, JPEG is ideal for photographs, while PNG works best for logos and icons.
Can I process multiple images at once?
Yes, simply select or drag multiple files when uploading. The same settings will be applied to all images, and results are displayed in a grid format. You can download individually or use the ZIP download for all files.
Are my images uploaded to a server?
No, all processing happens entirely within your browser. Your images are never sent to any server, ensuring complete privacy protection. Image data is cleared when you close the page.
What are the benefits of WebP format?
WebP is a next-generation image format developed by Google that achieves approximately 25-35% smaller file sizes than JPEG and 26% smaller than PNG at equivalent quality. It’s excellent for improving website loading speeds and is supported by most modern browsers.
How many images can I process at once?
Within your browser’s memory limits, you can process dozens of images at once. However, for large batches or high-resolution files, we recommend processing in smaller groups for optimal performance.