Free Image Compressor Online

Compress JPEG, PNG, WebP, and GIF images online without losing quality. Reduce image file size by up to 80% for faster website loading, better Core Web Vitals scores, and improved Google rankings — 100% free, no upload limits.

✓ JPEG / PNG / WebP✓ Up to 80% Compression✓ Lossless & Lossy✓ Batch Processing

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Supports JPEG, PNG, WebP, GIF — up to 5MB each

Higher = better quality, larger file. Lower = smaller file, some quality loss.

Compressed Results

Compressing images…

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Our free online Image Compressor reduces JPEG, PNG, WebP, and GIF file sizes by up to 80% without noticeable quality loss. Faster-loading images improve your Google Core Web Vitals score, reduce bounce rate, and directly boost your search rankings.

Why Image Compression is Critical for SEO

Images are typically the largest files on any webpage, often accounting for 50–80% of total page weight. Unoptimised images are the #1 cause of slow page load times, which negatively impact Google's Core Web Vitals metrics — specifically Largest Contentful Paint (LCP) and First Input Delay (FID). Google uses Core Web Vitals as direct ranking signals in its Page Experience update.

  • Page Speed: Compressed images load faster, improving Google PageSpeed Insights scores.
  • Core Web Vitals: LCP scores improve significantly when hero images are properly compressed.
  • Bounce Rate: Pages loading in under 3 seconds have 32% lower bounce rates than slow pages.
  • Mobile Performance: Compressed images are critical for mobile users on slower 4G connections.
  • Bandwidth & Hosting: Smaller images reduce server bandwidth usage and hosting costs.

Lossy vs Lossless Compression: Which Should You Use?

Lossy compression permanently removes some image data to achieve smaller file sizes. At 70–85% quality, lossy compression is virtually indistinguishable from the original while reducing file size by 60–80%. This is recommended for most web images, especially photographs.

Lossless compression reduces file size by optimising the image's internal encoding without removing any data. The output is pixel-perfect identical to the original but achieves only 10–30% size reduction. Use for logos, icons, and images where quality cannot be compromised.

Best Image Formats for Web in 2026

  • WebP: Google's modern format. 25–34% smaller than JPEG at equivalent quality. Supported by all modern browsers. Best choice for web.
  • AVIF: Next-generation format, even smaller than WebP. Growing browser support.
  • JPEG: Best for photographs. Wide browser support. Use at 75–85% quality for optimal balance.
  • PNG: Best for images with transparency, logos, and screenshots. Larger files than JPEG.
  • GIF: Limited to 256 colors. Use only for simple animations; prefer CSS animations for modern projects.

Recommended Image Sizes for Websites

  • Hero/Banner images: Max 200KB (compressed from original 1–3MB)
  • Blog post images: Max 100KB
  • Product images: Max 150KB
  • Thumbnails: Max 30KB
  • Logo: Max 20KB (use SVG where possible)

Frequently Asked Questions

Does image compression affect quality? +
At quality settings of 75–85%, lossy compression produces images visually indistinguishable from the original for most viewers. The quality loss is imperceptible to human eyes but results in significantly smaller file sizes. For critical use cases, use lossless compression.
What is the best image format for websites? +
WebP is the best format for modern websites — it offers 25–34% smaller file sizes than JPEG/PNG at equivalent visual quality and is supported by all modern browsers. Use JPEG for photographs when WebP is not an option.
Will compressed images affect my Google rankings? +
Yes, positively. Properly compressed images improve page load speed and Core Web Vitals scores (particularly LCP), which are confirmed Google ranking factors since the 2021 Page Experience update.
Is this image compressor free? +
Yes, completely free. No registration, no watermarks, no download limits. Compress as many images as you need.
Are my images stored on your servers? +
No. All compression happens locally in your browser using the Canvas API. Your images are never uploaded to our servers, ensuring complete privacy.

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