How does image compression work?

Image compression reduces file size by re-encoding the image with optimized settings. You can adjust the quality level to balance file size and visual quality. Lower quality settings create smaller files but may reduce image detail. All compression happens in your browser using WebAssembly technology.

What formats are supported?

The compressor supports PNG, JPG, and WEBP formats. You can compress images in their original format or convert to a different format for better compression. WEBP typically offers the best compression with high quality, JPG is great for photos, and PNG is best for graphics with transparency.

What quality setting should I use?

For most images, 85% quality provides excellent visual quality with good compression. For photos, you can go as low as 75% with minimal visible quality loss. For graphics and screenshots, use 90-95% to preserve sharp edges. Higher quality = larger file but better image detail.

Does compression reduce image dimensions?

No, compression only reduces file size by optimizing how the image data is stored. The width and height of your image remain unchanged. To resize images, you would need a separate image resizing tool.

Can I compress multiple images at once?

Currently, the tool processes one image at a time. For batch compression, you can compress each image individually and download the results. This ensures you have full control over each compression and makes credit usage transparent (1 credit per file).

What happens to transparent backgrounds?

PNG and WEBP preserve transparency during compression. If you compress to JPG format, transparent areas will be converted to a white background, as JPG does not support transparency.

Why is PNG compression less effective?

PNG uses lossless compression, meaning no quality is lost during compression. While this preserves perfect quality, it results in larger file sizes compared to lossy formats like JPG and WEBP. PNG compression re-encodes the image for optimization but cannot reduce quality to achieve smaller sizes.

Which format gives the smallest file size?

WEBP typically provides the smallest file sizes with excellent quality at the same compression level. JPG is also very efficient for photos. PNG creates larger files but preserves perfect quality and transparency. The best format depends on your needs: use WEBP for modern web, JPG for maximum compatibility, PNG for transparency.

Are my images uploaded to a server?

No, absolutely not. All compression happens locally in your browser using WebAssembly. Your images never leave your device, ensuring complete privacy and security. We never upload, store, or have access to your image files.

Can I revert compression?

No, compression is permanent. Always keep a copy of your original image before compressing. Once compressed with quality reduction (JPG/WEBP), the lost detail cannot be recovered. This is why we recommend testing different quality settings to find the right balance for your needs.

🗜️

Image Compressor

Compress images to reduce file size while maintaining quality. Supports PNG, JPG, and WEBP formats with adjustable quality settings. Convert between formats for optimal compression. All processing runs locally in your browser - files never leave your device.

Image File Tools

Loading tool...

How to Use Image Compressor

Quick Start

Upload File
- Drag and drop an image into the upload area
- Or click to browse and select a file from your computer
- Supports: PNG, JPG, and WEBP formats
- Maximum file size: 20MB
Choose Output Format
- Keep original format: Compress without changing format
- Convert to JPG: Smaller files, no transparency (best for photos)
- Convert to PNG: Lossless quality, preserves transparency
- Convert to WEBP: Modern format, best compression with quality
Adjust Quality (for JPG/WEBP)
- Use the quality slider (50-100%)
- 75-80%: Maximum compression, visible quality loss
- 85-90%: Recommended balance of quality and size
- 95-100%: Minimal compression, near-original quality
- PNG compression is lossless (no quality slider)
Compress Image
- Click "Compress Image" button
- Compression happens instantly in your browser
- View file size reduction and compression ratio
Download Result
- Click "Download Compressed" to save your file
- File is named with "-compressed" suffix
- Use "Compress Another" to process more files

Privacy & Security

✅ 100% Browser-Based

All compression happens in your browser using WebAssembly
Files never leave your device
No data is sent to any server
Zero server-side processing

✅ Fast & Efficient

Instant compression in your browser
No waiting for uploads or downloads
File contents remain completely private

✅ Secure

No file storage
No tracking of file contents
HTTPS encryption for credit transactions

Tips for Best Results

Quality Settings

50-70%: Maximum compression, smaller files, visible quality loss
85-90%: Recommended for web images (great balance)
95-100%: Minimal compression, near-original quality

File Size Reduction

JPG/WEBP at 85% quality typically reduces size by 40-70%
PNG compression is lossless (re-encodes for optimization)
Photos and complex images compress best
Screenshots may not compress as much

Format Selection Guide

JPG: Best for photos, smallest file size, no transparency
PNG: Best for graphics with transparency, lossless quality
WEBP: Modern format with excellent compression and quality

When to Use Each Format

JPG

✅ Photos and images with many colors
✅ Web images where file size matters
✅ Social media uploads
✅ Email attachments
❌ Logos or graphics requiring transparency

PNG

✅ Logos and graphics with transparency
✅ Images with text
✅ Screenshots
✅ When lossless quality is required
❌ Large photos (file size will be bigger)

WEBP

✅ Modern websites and web apps
✅ Best compression with quality
✅ Supports transparency
✅ Photos and graphics
❌ Older browsers (limited support)

Technical Details

Max file size: 20 MB
Input formats: PNG, JPG, WEBP
Output formats: PNG, JPG, WEBP
Quality range: 50-100% (for JPG/WEBP)
Processing: Client-side using WASM (@jsquash)

Troubleshooting

File not compressing?

Check file size (must be under 20MB)
Verify file format is supported (PNG, JPG, or WEBP)
Try refreshing the page

Quality looks poor?

Increase quality slider to 90-100%
Try different format (WEBP for best quality/size ratio)

File size not reducing much?

Some images are already well-compressed
Try converting to different format (JPG for photos, PNG for graphics)
Lower quality setting for smaller files

Frequently Asked Questions

🖼️

WEBP to PNG Converter

Convert WEBP images to PNG format with lossless quality. All conversions run locally in your browser - files never leave your device. Perfect for preserving transparency and maximum quality.

Use Tool →

Share Your Feedback

Help us improve this tool by sharing your experience