What's the difference between compression and resizing?

Compression reduces file size by optimizing encoding and removing redundant data while keeping the same dimensions. Resizing changes the image dimensions (width/height) which also reduces file size. You can combine both: resize first to reduce dimensions, then compress for maximum file size reduction while maintaining acceptable quality.

Will compression reduce image quality?

Lossy compression (like JPEG) reduces quality slightly to achieve smaller file sizes, but with quality settings of 60-80%, the quality loss is usually imperceptible to the human eye. Lossless compression (like PNG) maintains 100% quality but achieves less compression. Choose based on your quality vs. size priorities.

What quality setting should I use?

For web use: 60-80% provides good balance between quality and file size. For social media: 70-85% maintains quality while keeping files manageable. For thumbnails: 50-60% is sufficient. For professional photography: 85-95% preserves quality. Start with 70% and adjust based on your specific needs and visual requirements.

Which format is best for compression?

WEBP offers the best compression (25-35% smaller than JPEG) with good quality and is supported by modern browsers. JPEG is widely compatible and excellent for photographs. PNG is best for images with transparency but results in larger files. For maximum compression, use WEBP; for maximum compatibility, use JPEG.

JPG Compressor

Compress JPG images in seconds with private browser-based processing.

Compression Settings

Adjust compression quality to reduce file size

Output Format

JPEG

Converting to JPEG format

Compression Quality: 80%

Smaller SizeBetter Quality

Max file size

Binary-search quality so output stays under this size. Ignored if Off.

Reduce dimensions

Resize so longest edge does not exceed this (smaller pixels → smaller file). Uses stepped downscale to keep image sharp.

Pre-encode denoise

Auto = only when noise detected. On = always. Off = never.

Denoise strength: 45%

Lower = preserve detail, higher = smoother (can soften image).

Choose images

or click to browse • Multiple files supported

Supported: JPG.

JPG Compressor

Compress JPG images in seconds with private browser-based processing.

Image compression reduces file size by removing redundant data and optimizing encoding. There are two main types: lossless compression (no quality loss) and lossy compression (slight quality reduction for smaller files).

When to Use Different Formats

JPG: for maximum compatibility and photographs. WebP: for modern websites and applications. PNG: when transparency is required.

Compression Formats Explained

JPG: Widely compatible format ideal for photographs with millions of colors. WebP: Modern format offering 25-35% better compression than JPEG while maintaining quality. PNG: Best for images with transparency, but typically larger file sizes.

Quality Settings Guide

High Quality (80-100%): Best for professional photography and print materials Medium Quality (60-80%): Ideal for web use, social media, and general purposes Low Quality (40-60%): Suitable for thumbnails and preview images

Common Use Cases

Reduce image sizes for faster page loads, better SEO rankings, and improved user experience. Optimize product images, blog post images, and hero banners.
Compress images before uploading to Instagram, Facebook, Twitter, and other platforms. Each platform has size limits, and smaller files upload faster.
Reduce file sizes to ensure emails send quickly and don't bounce due to size limits. Most email providers limit attachments to 25MB.
Free up space on your devices and cloud storage by compressing large image collections without noticeable quality loss.

Best Practices for Image Compression

High Quality (80-100%): Best for professional photography and print materials
Medium Quality (60-80%): Ideal for web use, social media, and general purposes
Low Quality (40-60%): Suitable for thumbnails and preview images

Common Use Cases

Website Optimization — Reduce image sizes for faster page loads, better SEO rankings, and improved user experience. Optimize product images, blog post images, and hero banners.
Social Media — Compress images before uploading to Instagram, Facebook, Twitter, and other platforms. Each platform has size limits, and smaller files upload faster.
Email Attachments — Reduce file sizes to ensure emails send quickly and don't bounce due to size limits. Most email providers limit attachments to 25MB.
Storage Management — Free up space on your devices and cloud storage by compressing large image collections without noticeable quality loss.

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