🗜️ Free Image Compressor

Compress JPEG, WebP & PNG images directly in your browser. Batch process multiple files, adjust quality, resize, and download. No upload required - 100% private.

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Drop images here or click to select
Supports JPEG, PNG, WebP, BMP, GIF · Batch supported

How to Use the Image Compressor

  1. Upload your images: Drag and drop one or more images (JPEG, PNG, or WebP) into the upload area, or click to browse and select files from your device.
  2. Adjust compression settings: Set the quality level using the slider. Lower quality means smaller file size. You can also enable resize options to reduce dimensions.
  3. Process and compare: The tool compresses each image in your browser and shows the original and compressed sizes side by side, along with the percentage savings.
  4. Download the results: Download individual compressed images or all at once. Your images never leave your device — all processing is done locally.

Understanding Image Compression

Image compression reduces file size by eliminating redundant or less important visual data. There are two main types: lossless compression, which preserves every pixel exactly and reconstructs the original image perfectly, and lossy compression, which discards some visual information that the human eye is less likely to notice. JPEG uses lossy compression, making it ideal for photographs where small detail losses are imperceptible. PNG uses lossless compression, preserving every pixel but resulting in larger files.

WebP, developed by Google, supports both lossy and lossy compression and typically produces files 25 to 35% smaller than JPEG at equivalent visual quality. For web pages, choosing the right format and compression level can dramatically improve page load times, which directly affects user experience and SEO rankings. Google PageSpeed Insights and Core Web Vitals both penalize pages with large, unoptimized images, making compression an essential part of web development.

The key to effective image compression is finding the sweet spot between file size and visual quality. For most web use cases, a JPEG quality setting of 70 to 85 provides an excellent balance — file sizes are typically reduced by 50 to 70% compared to uncompressed originals, while the visual quality loss is nearly imperceptible to most viewers. For images with sharp edges, text, or flat colors (like logos or screenshots), PNG or WebP lossless is preferable to avoid the artifacts that JPEG compression introduces.

Frequently Asked Questions

Which format should I choose?
JPEG is best for photos, WebP offers better compression with transparency support, and PNG is lossless (no quality loss) but typically larger.
Why is my PNG bigger after "compression"?
PNG is a lossless format, so re-encoding rarely reduces size unless you also resize. For photos, JPEG or WebP will compress far more.
Can I compress multiple images at once?
Yes. Drop or select multiple files, configure quality and dimensions once, and click "Compress All". Download each file individually or grab them all at once.
What does the quality slider do?
It controls the JPEG/WebP encoder quality (10–100). Lower values produce smaller files with more visual loss. PNG ignores the quality slider.
Are my images uploaded to a server?
No. All compression happens entirely in your browser using Canvas API and WebAssembly. Your images never leave your device, ensuring complete privacy. This also means the tool works without an internet connection once loaded.
What is the best quality setting for web images?
For most photographs, a JPEG quality of 75 to 85 provides an excellent balance between file size and visual quality. For images requiring transparency or sharp edges (logos, screenshots), use PNG or WebP lossless. Always test different settings and view the results at actual size.
Does compression work with batch processing?
Yes. You can drag and drop multiple images at once, and the tool compresses each one independently using your selected settings. Batch processing is perfect for optimizing an entire folder of images before uploading to a website or content management system.

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