Compress Image Online
Reduce image file size instantly — free, private, 100% in your browser
Drop image here or click to upload
JPG, PNG, WebP — max 20MB
You can also paste an image (Ctrl+V)
What Is Image Compression?
Image compression is the process of reducing the file size of an image while maintaining acceptable visual quality. When you compress image files, you remove redundant data that the human eye cannot easily detect, resulting in smaller files that load faster on websites, take up less storage, and are quicker to share via email or messaging apps.
There are two main types of image compression: lossy and lossless. Lossy compression (used for JPG and WebP) permanently removes some image data to achieve smaller file sizes — typically reducing files by 60–90% with minimal visible quality loss. Lossless compression (used for PNG) reduces file size without losing any data, but typically achieves smaller reductions of 10–30%.
How to Compress Images Online — 3 Simple Steps
- 1
Upload your image
Click the upload area above, drag and drop your image, or paste it from your clipboard (Ctrl+V). We accept JPG, PNG, and WebP files up to 20MB.
- 2
Choose your quality level
Use the quality slider to balance file size against image quality. The default setting of 80% delivers excellent results for most images — reducing file size by 60–80% while keeping the image looking sharp. Set it lower (40–60%) for maximum compression, or higher (85–95%) to preserve fine details in photos.
- 3
Download your compressed image
Compression happens instantly in your browser. Once complete, you will see the original size, compressed size, and how much space you saved. Click the Download button to save your compressed image.
Why Compress Images?
Reducing image file size has a significant impact on performance, cost, and user experience across many contexts:
- →Faster websites: Images are the single largest contributor to page weight. Compressing images can cut load times by 2–5 seconds on mobile connections, directly improving Google Core Web Vitals scores and SEO rankings.
- →Lower storage costs: Compressed images take up less space in cloud storage (AWS S3, Google Cloud, Cloudinary), which reduces hosting costs at scale. A website with 10,000 product images can save gigabytes of storage by compressing to optimal sizes.
- →Email and social media sharing: Many email services reject attachments over 10MB, and social platforms automatically re-compress images (often poorly). Compressing before uploading gives you control over final quality.
- →Better mobile experience: Mobile users on 4G or slower connections benefit the most from optimized images. Reducing image sizes by 70% can save megabytes of data per page load.
- →E-commerce conversions: Studies show that a 1-second delay in page load time reduces conversions by up to 7%. Optimizing product images is one of the fastest ways to improve site speed and revenue.
Supported Image Formats
JPG / JPEG
Best for photographs and images with gradients. Lossy compression achieves 60–90% file size reduction. Ideal for blog posts, social media, and product photos.
PNG
Best for images with transparency, logos, and graphics with flat colors. Supports lossless compression. Use PNG when you need sharp edges and alpha transparency.
WebP
Modern format from Google that outperforms both JPG and PNG. Supported by all modern browsers. WebP delivers 25–35% smaller files than JPG at equivalent quality.
Compress Images Without Losing Quality
The key to compressing images without visible quality loss is choosing the right quality level for the content. For photographs with rich detail, a quality setting of 75–85% is typically indistinguishable from the original when viewed on screen. For images that will be displayed small (thumbnails, icons), you can compress more aggressively to quality 50–60% without visible degradation.
Our compressor uses advanced algorithms via the browser-image-compression library, which runs compression in a Web Worker to keep your browser responsive. Maximum image dimensions are automatically capped at 1920px — matching standard screen resolutions — so images are never scaled up unnecessarily. The result is consistently high-quality output at dramatically reduced file sizes.
How to Reduce Image Size to a Specific KB
If you need to reduce image size to a specific target like 100KB or 200KB, use the quality slider as a guide. Start at quality 80 and check the compressed size shown after processing. If the file is still too large, click "Compress another image" to reset, then try a lower quality setting (e.g., 60 or 50). Repeat until the output meets your size requirement.
As a general rule: Quality 80 = roughly 60–75% reduction from original. Quality 60 = roughly 75–85% reduction. Quality 40 = 85–90% reduction (noticeable quality loss on large prints). For web use, quality 70–85 is the optimal range for most images.
Privacy — Your Images Never Leave Your Device
Unlike many online image compressors that upload your files to remote servers for processing, our tool runs entirely in your browser using the Web Compression API and JavaScript. Your images are never uploaded, stored, or analyzed on any server. There are no accounts to create, no watermarks added, and no usage limits. Compression happens locally on your device within seconds, making it both faster and more private than server-based alternatives.
For full details on how we handle data and advertising, see our Privacy Policy and Terms of Service.