无损压缩
无损压缩图片 — 免费在线工具
想要更小的文件又担心质量?用高质量设置和 WebP 等现代格式压缩图片,无可见质量损失——全程在浏览器中,无需上传、无需注册。对比滑块确保您认可结果。
Why use this compress lossless tool?
Compress JPEG, PNG and WebP with no visible quality loss
High-quality preset keeps images crisp
Before/after comparison slider to verify results
Batch compress multiple images at once
100% local, private, free, no signup
Frequently Asked Questions
Can I compress an image without losing quality?
Yes. At quality 80 or higher, or by converting to WebP, the visible quality is virtually identical to the original while the file size drops significantly. Use the comparison slider to confirm.
What is the best format for lossless compression?
PNG is lossless but large. For the web, WebP at high quality gives near-lossless results at a fraction of the size. Choose the format that fits your use case.
How do I check quality after compression?
Use the built-in before/after comparison slider to compare the original and compressed image side by side before downloading.
Is lossless image compression free?
Yes, completely free with no watermark, signup, or file limits. All processing happens locally in your browser.