Image Compress
Compress image size while maintaining visual quality
Compression Quality80%
Small SizeHigh Quality
Max Width
Output Format
Upload images to start compression
Features
Professional image compression tool
Batch Processing
Support uploading and compressing multiple images simultaneously, improving work efficiency
Adjustable Quality
Freely adjust compression quality to find balance between size and clarity
Size Limit
Can set maximum width, automatically proportionally shrink oversized images
Multi-Format Output
Can output as original format, JPEG or smaller WebP format
Real-time Preview
Display before/after comparison, intuitively understand compression effect
Local Processing
All compression is done in browser, images are never uploaded to server
Frequently Asked Questions
Common questions about image compression
What compression quality setting is appropriate?
Generally recommend 70-85%. This range can significantly reduce file size while maintaining good visual quality.
• Web display: 70-80% is enough, focus on loading speed
• Print/Archive: 85-90%, retain more details
• Thumbnails: 60-70% is fine
• Web display: 70-80% is enough, focus on loading speed
• Print/Archive: 85-90%, retain more details
• Thumbnails: 60-70% is fine
Why do some images become larger after compression?
This may be because:
• Original image is already highly compressed JPEG, limited compression effect
• Quality setting is higher than original image compression quality
• When converting PNG to high-quality JPEG, compression advantage is lost
Recommend trying to lower quality setting or use WebP format.
• Original image is already highly compressed JPEG, limited compression effect
• Quality setting is higher than original image compression quality
• When converting PNG to high-quality JPEG, compression advantage is lost
Recommend trying to lower quality setting or use WebP format.
What are the advantages of WebP format?
WebP is a modern image format developed by Google, can reduce size by 25-35% compared to JPEG while maintaining same quality. It supports both lossy and lossless compression, and also supports transparency. All major browsers now support WebP.
What is the purpose of max width limit?
Limiting max width can significantly reduce file size. For example, a 4000px image shrunk to 1920px reduces pixel count by 75%, file size will also decrease significantly. For web use, 1920px is usually sufficient.
Can compressed images be recovered?
Lossy compression (JPEG, WebP lossy mode) is irreversible, cannot recover to original quality. Recommend keeping original image backup, only compress copies when needed. Lossless formats (PNG) can be fully recovered after compression.