免费图片压缩工具

在保持画质的同时缩小图片文件大小。改善网站加载速度，优化SEO。

Drag & drop images here

Supports JPG, PNG, WebP, GIF — up to 50MB per file, 10 images at once

Select Images

什么是图片压缩工具？

图片压缩工具在保持视觉质量的同时缩小图片文件大小。大图片会拖慢网站加载，影响用户体验和SEO。

本工具在浏览器内处理图片，无需上传到服务器。隐私受保护，处理速度快。

How It Works

1

Upload Images

Drag and drop or select up to 10 images at once. Supports JPG, PNG, WebP, and GIF files up to 50MB each.

2

Adjust Settings

Choose your output format, quality level, and optional maximum width. Preview changes in real-time before compressing.

3

Download Results

Compare before/after sizes, see the compression percentage, and download individual files or all at once.

Why Use Kleap Image Compressor?

100% Private

Images are compressed in your browser. Nothing is uploaded to any server. Your files stay on your device.

Batch Processing

Compress up to 10 images at once. Process entire photo sets in seconds, not minutes.

Instant Preview

See before and after previews side by side. Compare file sizes and visual quality before downloading.

Multiple Formats

Output as JPEG, WebP, or PNG. Convert between formats for optimal file sizes on any platform.

Smart Resize

Optionally resize images to a max width (1920, 1280, or 800px) while maintaining aspect ratio.

Free & Unlimited

No signup, no watermarks, no daily limits. Compress as many images as you need, forever.

图片优化建议

1

Use WebP for Websites

照片用JPEG/WebP，透明图用PNG，现代浏览器用WebP。

2

80% Quality Is the Sweet Spot

2000px宽的图片显示600px时，预先调整大小可大幅减小文件。

3

Resize Before Compressing

WebP比JPEG小25-35%，所有现代浏览器支持。

4

Use PNG Only When Needed

屏幕外图片添加loading='lazy'属性缩短初始加载时间。

5

Compress Before Uploading

Always compress images before uploading to your CMS or website builder. This saves storage space and ensures fast page loads.

6

Test on Mobile

Mobile users on slower connections benefit the most from compressed images. Aim for under 200KB per image for hero sections.

图片压缩：Kleap vs 替代方案

功能KleapTinyPNGSquooshCompressor.io
价格完全免费免费（500张/月）免费Free (limited)
隐私浏览器内处理上传到服务器浏览器内处理Server upload
Batch UploadUp to 10 filesUp to 20 files1 file only1 file only
Output FormatsJPEG, WebP, PNGPNG, JPEG, WebP8+ formatsJPEG, PNG, GIF, SVG
Max File Size50MB5MBNo limit10MB
Quality SliderYes (10-100%)No (auto only)Yes (advanced)Yes

People Also Ask

Does compressing an image reduce quality?+
Lossy compression (JPEG, WebP) removes some data, but at 75-85% quality the difference is imperceptible to the human eye. Lossless compression (PNG) reduces file size without any quality loss by optimizing how data is stored.
What is the best image format for websites?+
WebP is the best format for most web images. It offers 25-35% smaller files than JPEG with equivalent quality and supports transparency like PNG. All modern browsers support WebP. Use JPEG as a fallback for older browsers.
How much can I compress an image without losing quality?+
Most photos can be compressed 60-80% with no visible quality loss. The exact amount depends on the image content, resolution, and chosen format. Photos with large areas of similar color compress better than highly detailed images.
Is it safe to compress images online?+
With Kleap, yes. Our compressor runs entirely in your browser — your images are never uploaded to any server. Tools that require server-side processing do upload your files, which may be a privacy concern for sensitive images.
What is the difference between lossy and lossless compression?+
Lossy compression (JPEG, WebP) permanently removes some image data to achieve smaller files. Lossless compression (PNG) reduces file size without removing any data, but typically achieves less reduction. For web photos, lossy compression at 80% quality offers the best balance.

常见问题

压缩会降低画质吗？+
适当的质量设置（70-85%）下，肉眼几乎看不出差别。
哪种格式最适合网页？+
照片用WebP或JPEG，透明图用PNG，图标用SVG。
什么是浏览器内处理？+
图片不上传到服务器，直接在浏览器中处理。隐私受保护且速度快。
一次能处理多少张？+
支持批量处理，拖放即可上传多张图片。
什么是WebP？+
Google开发的图片格式，比JPEG小25-35%但画质相当。所有现代浏览器支持。
图片大小影响SEO吗？+
是的。大图片降低页面速度，影响Google的Core Web Vitals排名因素。
How does the quality slider work?+
The quality slider controls the compression level from 10% (maximum compression, lower quality) to 100% (minimum compression, original quality). For JPEG and WebP, 80% is the recommended sweet spot.
Can I resize images while compressing?+
Yes. Use the Max Width option to resize images to 1920px, 1280px, or 800px while maintaining aspect ratio. Resizing before compressing gives you the biggest file size reduction.
Does this work on mobile?+
Yes. The compressor works in any modern browser on desktop, tablet, or mobile. Drag-and-drop works on desktop; tap to select files on mobile.
Why should I compress images for my website?+
Compressed images load faster, reduce bandwidth costs, improve Core Web Vitals scores, and boost your SEO rankings. Google uses page speed as a ranking factor, and images are typically the largest files on a web page.

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免费图片压缩工具 | 缩小图片大小 | Kleap