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Image compressor

Compress JPEG, PNG, WebP and AVIF images in your browser. No upload to any server. Drag and drop multiple files, adjust quality, download optimized images instantly.

Quality80%
Max widthpx (0 = no resize)
Format

Drop images here, click to browse, or Ctrl+V to paste

JPEG, PNG, WebP — unlimited files, unlimited size

What is Image Compressor?

An image compressor reduces the file size of images without significant loss of visual quality. Smaller images load faster on websites, improving page speed scores, Core Web Vitals (especially Largest Contentful Paint), and user experience. This free online image compressor processes everything in your browser using the Canvas API — your images are never uploaded to any server, making it completely private and fast. It supports JPEG, PNG, and WebP formats with adjustable quality from 10% to 100%. You can optionally set a maximum width to resize large images while maintaining aspect ratio. The tool handles batch processing, so you can compress dozens of images at once by dragging and dropping them. Each result shows the original size, compressed size, and percentage saved, with one-click download for individual images or the entire batch.

How to Use Image Compressor

  1. 1

    Adjust quality and max width

    Set the quality slider (default 80% works well for most images) and optionally set a max width in pixels to resize large images while preserving aspect ratio.

  2. 2

    Drop or select images

    Drag and drop one or multiple images onto the drop zone, or click to browse your files. The tool accepts JPEG, PNG, and WebP formats with no file size limit.

  3. 3

    Download compressed images

    Review the compression results showing original and new file sizes. Download images individually or click Download All to save the entire batch at once.

Features

  • Compress JPEG, PNG, WebP and AVIF with adjustable quality slider
  • Batch processing — drag and drop multiple images at once
  • Optional max-width resize with aspect ratio preservation
  • Zero server upload — all processing in your browser via Canvas API
  • Real-time compression stats showing bytes saved and percentage
  • Download individually or batch download all compressed images

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Frequently Asked Questions

Are my images uploaded to a server?+
No. All compression happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device, making this tool completely private and safe for confidential images.
What quality setting should I use?+
For web images, 75-85% offers the best balance between file size and visual quality. For photography portfolios, use 85-95%. For thumbnails and social media, 60-75% is usually sufficient. The visual difference below 80% is barely noticeable on most images.
What output format does the tool use?+
JPEG and WebP inputs are compressed to WebP format (which offers better compression). PNG inputs remain as PNG to preserve transparency. WebP is supported by all modern browsers and offers 25-35% smaller files than JPEG at equivalent quality.
Is there a file size or count limit?+
No artificial limits. The tool processes images using your browser memory, so it can handle large batches. Modern devices easily handle 50+ images at once. Very large images (50MP+) may take a few seconds each.
Will compression reduce image dimensions?+
Not by default. Compression only reduces file size through quality optimization. To also reduce pixel dimensions, set a max width value. Images smaller than the max width are not upscaled.
How much file size reduction can I expect?+
Typical results: JPEG photos see 40-70% reduction at 80% quality. PNG graphics see 30-50% reduction. Already-optimized images may see smaller reductions. The tool shows exact savings for each image.