What is JPG Converter?

A free browser-based JPG converter tool. Convert PNG, WebP, GIF, SVG, and other image formats to high-compression JPG format.

JPG format is optimized for photo storage, dramatically reducing file sizes while maintaining compatibility with virtually all devices and browsers. The quality slider lets you freely adjust the balance between image quality and file size, making it ideal for web image optimization.

Convert up to 20 images at once, with all processing happening in your browser—your images never leave your device.

Key Features

• Batch Conversion Support: Process up to 20 images simultaneously
• Quality Adjustment Slider: Set compression rate from 1 to 100
• Real-time Preview: Instantly view conversion results
• Reduction Rate Display: Show before/after sizes with reduction percentage
• ZIP Batch Download: Save all images together
• Privacy Protection: No server uploads required

JPG Format Features

JPG (JPEG) is a widely used image format for storing photos and landscape images.

High Compression Reduces File Size

Achieves approximately 30-60% file size reduction compared to PNG. Effective for improving website loading speeds and saving storage capacity.

Broad Compatibility

Viewable and editable on virtually all devices, browsers, image editing software, and social media platforms. A highly versatile format that reliably opens even on older devices.

Optimized for Photos

Efficiently compresses natural photos and complex gradients. Suitable for images with many color variations like landscape photos, portraits, and food photography.

Lossy Compression

Some quality degradation occurs during compression, but with quality settings of 80-90, visual differences are barely noticeable.

Quality Settings Guide

Adjust quality based on your use case to find the optimal balance between file size and image quality.

🌐 Web Photos (Quality 75-85)

Settings for general photos on websites and blog articles. Balances page loading speed and image quality—the most versatile setting range.

📱 Social Media Images (Quality 80-90)

Suitable for images posted to Instagram, Twitter, Facebook, etc. Maintains sufficient quality even after automatic compression by social media platforms.

🎨 High Quality Required (Quality 90-100)

Settings when image quality is the top priority, such as portfolio pieces or print data. File sizes increase but maintain quality close to the original.

📧 Email Attachments & Lightweight Use (Quality 60-75)

Settings prioritizing file size. Useful for avoiding email capacity limits or reducing mobile data usage.

Lower quality results in smaller file sizes but also degrades image quality. Check the preview to see the actual result while adjusting.

Use Cases

Improve Website Loading Speed

Reducing image file sizes improves page loading speed, enhancing user experience and SEO performance. Particularly effective in mobile environments.

Prepare Blog Article Images

Convert photos for articles to JPG format for delivery at appropriate file sizes. Also reduces data usage for readers.

Optimize Social Media Images

Reducing file size before upload shortens posting time. Post efficiently while maintaining image quality.

Reduce Email Attachment Size

When sending large photos via email, reduce file size to avoid sending limits.

Optimize E-commerce Product Images

Converting product photos to JPG and improving page display speed can lead to reduced bounce rates.

How to Use

1. Click "Select File" button or drag and drop images to upload
2. Set compression quality with quality slider (recommended: 80-90)
3. Check file size changes in preview
4. Download individually or batch download as ZIP

Moving the quality slider after conversion automatically re-converts all images.

Frequently Asked Questions

What's the difference between JPG and JPEG?

JPG and JPEG are the same image format. Only the file extension differs—the content is completely identical.

Will converted image quality degrade?

Since JPG format uses lossy compression, some degradation may occur depending on quality settings. However, with quality settings of 80-90, visual differences are barely noticeable.

What happens when converting transparent PNG images?

Transparent areas are filled with a white background. To preserve transparent backgrounds, please use the PNG converter tool.

How much can file size be reduced?

Depending on the original image format and quality settings, typical reductions are 30-60% from PNG and 10-30% from WebP.

How many images can I convert at once?

You can upload and convert up to 20 images simultaneously.

What types of images are suitable for JPG format?

Suitable for photos, landscapes, portraits, food, and other images with many color variations. For illustrations or text-heavy images, PNG format may be more appropriate.

Usage Notes

Processing large images or many images at once may take time depending on browser performance.

Always check image quality in the preview after conversion before use. Choosing appropriate quality settings for your use case is important.