压缩器 v1.0

拖拽您的图片。

拖拽、浏览、粘贴或选择文件夹。我们将在本地生成预览并在您的浏览器中压缩一切。

Drop images here to start

· ·

  • JPG
  • PNG
  • WebP
  • AVIF
  • GIF
  • SVG
  • HEIC

Settings

Compression

Saved locally

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Compress and optimize images for the web.

Images are the single biggest performance bottleneck on most websites — accounting for 50-80% of total page weight. Optimizing them is the most impactful thing you can do for page speed, Core Web Vitals, and SEO.

A 5 MB hero image becomes 200-500 KB with no visible quality difference after compression to WebP at quality 80. Page speed improves by seconds, and Google rewards the improvement with better rankings.

Key features

  • WebP and AVIF conversion for 25-50% smaller files
  • Quality 75-85 optimized for web delivery
  • Resize to display dimensions before compression
  • EXIF metadata stripping for smaller files
  • Batch processing for entire site image libraries

How to web image optimizer — step by step

  1. Drop your images: Drag website images onto the upload area. Supports JPEG, PNG, WebP, AVIF, and GIF.
  2. Set web-optimized quality: Choose quality 75-85 for the best balance. Enable target-size mode for CMS-specific limits.
  3. Convert to WebP or AVIF: Set output to WebP (97%+ browser support) or AVIF. This alone reduces file size by 25-50% compared to JPEG.
  4. Download and deploy: Save individual files or all as a ZIP. Replace your site's images and measure the PageSpeed improvement.

Common use cases

Whether you are a photographer, web developer, e-commerce manager, or social media creator, optimizing images before publishing saves bandwidth, improves page load times, and ensures compatibility with platform-specific requirements. Our browser-based compressor works with all major image formats and processes everything locally for your browser with no uploads.

Need to convert images between formats? Try our Image Converter. To resize images for any platform, use the Image Resizer. For rotation and flipping, check the Image Rotator. To crop images with preset aspect ratios, use the Image Cropper.

Web Image Optimizer

Frequently Asked Questions

  • Why is image compression important for websites?

    Images account for 50-80% of a typical webpage's total weight. Unoptimized images directly increase Largest Contentful Paint (LCP), a Core Web Vitals ranking signal.

  • What is the best image format for the web?

    WebP is the best all-around format — 25-35% smaller than JPEG at the same quality with transparency support. AVIF offers even better compression with 92%+ browser support.

  • What is the optimal image quality for web?

    Quality 75-85 is the sweet spot. Photos are visually indistinguishable from the original while being 60-80% smaller.

  • Should I resize images before compressing for web?

    Yes. Resize to the maximum display dimensions your layout needs before compressing. Serving oversized images wastes bandwidth.

  • How does image compression affect Core Web Vitals?

    Image compression directly improves Largest Contentful Paint (LCP). Compressing a hero image from 3 MB to 300 KB can cut LCP by several seconds.