Simply Compress

Upload Your Image Files

Click to upload or drag & drop your image files

When uploading multiple images, select or drag images all at once.

Supports: JPEG, JPG, PNG, WebP files up to 10MB

Your images never touch our server so your images are 100% private

Format Selection

Output Format:

Quality Control Settings

Quality: 80%

Tip: Quality settings vary by format. JPEG and WebP support 10-100% quality. PNG uses lossless compression with optimization levels.

Resize Options

No Resize - Keep original dimensions
Resize by Percentage
Custom Size - Specify dimensions

Complete Guide to Image Compression

What is Image Compression?

Image compression reduces file size by removing unnecessary data or optimizing how image data is stored. Different formats use different compression methods - some are lossless (no quality loss) while others are lossy (some quality loss for smaller files).

Image Format Comparison

JPEG (.jpg, .jpeg)

Best for: Photographs and images with many colors
Compression: Lossy
Supports: 16.7 million colors
Transparency: No

PNG (.png)

Best for: Graphics, logos, images with transparency
Compression: Lossless
Supports: 16.7 million colors + alpha channel
Transparency: Yes

WebP (.webp)

Best for: Modern web applications
Compression: Both lossy and lossless
Supports: 16.7 million colors + alpha channel
Transparency: Yes

When Should You Compress Images?

Web Publishing: Faster loading times improve user experience and SEO rankings
Email Attachments: Avoid size limits and ensure successful delivery
Storage Management: Save space on devices and cloud storage
Social Media: Meet platform requirements and upload faster
Print Preparation: Optimize for specific print sizes and resolutions

Understanding Quality Settings by Format

JPEG & WebP Quality Settings:

90-100%: Minimal compression, highest quality, larger file sizes
80-90%: Good balance between quality and file size (recommended for most uses)
60-80%: Moderate compression, noticeable quality reduction
Below 60%: Heavy compression, significant quality loss

PNG Optimization:

PNG uses lossless compression, so no quality is lost.
Optimization reduces file size by improving compression efficiency.
Best for images with large areas of solid color or sharp lines.
Transparency support makes it ideal for logos and graphics overlays.

WebP Advantages:

25-35% smaller file sizes compared to JPEG at equivalent quality.
Superior compression algorithms for both lossy and lossless modes.
Supports both transparency and animation.
Growing browser support (over 95% of modern browsers).

How Different Compression Methods Work

JPEG Compression: Uses Discrete Cosine Transform (DCT) to analyze image data and remove information less noticeable to the human eye.

PNG Compression: Uses the DEFLATE algorithm (similar to ZIP files) to compress image data without any loss of quality.

WebP Compression: Uses predictive coding to encode images, predicting pixel values from surrounding blocks and then storing only the differences.

Benefits of Image Compression

Faster Website Loading

Compressed images load faster, improving user experience and search engine rankings. Studies show that 40% of users abandon sites that take more than 3 seconds to load.

Reduced Storage Costs

Smaller file sizes mean less storage space required, reducing hosting costs and freeing up device storage for other content.

Better Email Delivery

Compressed images are more likely to pass through email filters and avoid size restrictions, ensuring your messages reach recipients.

Improved Mobile Experience

Smaller files consume less mobile data and load faster on slower connections, crucial for mobile users.

Expert Tips for Image Optimization

Before Compression

Choose the Right Format: Use JPEG for photographs, PNG for graphics with transparency, and WebP for modern web apps.
Resize First: Reduce dimensions before compressing for maximum size reduction.
Check Your Source: Start with the highest quality original image you have.
Consider Your Audience: Balance quality needs with loading speed requirements.
Browser Support: Ensure your chosen format is supported by your target browsers.

Format-Specific Best Practices

JPEG Optimization:

Use progressive JPEG for better perceived loading performance on websites.
Optimize for the content: higher quality for detailed photos, lower for simple images.
Remove EXIF data (if not needed) to reduce file size further.