Image Compressor
Compress JPG, PNG and WebP images in your browser — fast, private, batch.
How to Use Image Compressor
Drag and drop or click to select one or multiple images (JPG, PNG, WebP, GIF). Everything stays in your browser — nothing is uploaded.
Drag the quality slider to balance file size vs. image quality. Choose output format — WebP gives the smallest files.
Set a Max Width or Height to also downscale large images. Aspect ratio is preserved automatically.
Click "Compress All" and then download each image individually or use "Download All" to save them together.
Features & Benefits
Batch Processing
Compress multiple images at once — no need to process them one by one.
100% Private
All compression happens in your browser using the Canvas API. Files never leave your device.
Smart Resize
Set max dimensions to downscale images while preserving the original aspect ratio.
WebP Support
Convert to WebP for up to 30% smaller files than JPEG with the same quality.
Supported Formats
Common Use Cases
About Image Compressor
Why Compress Images?
Images typically account for 50–80% of a webpage's total data size. Uncompressed images slow page load times, hurt Core Web Vitals scores, waste mobile data, and reduce Google search rankings. Compressing images before uploading them is one of the highest-impact optimizations available to any website owner or developer.
Lossy vs Lossless Compression
Lossy compression (JPEG, WebP) permanently removes some image data to achieve smaller file sizes. At quality settings of 75–85%, the visual difference is imperceptible to most viewers while file sizes reduce by 60–80%.
Lossless compression (PNG, WebP lossless) reduces file size without removing any data — the decompressed image is identical to the original. File size reduction is typically 20–50%.
When to Use Each Format
- JPEG — Photographs, complex images with gradients, where transparency isn't needed
- PNG — Screenshots, logos, icons, images with text, anything needing transparency
- WebP — Web use, best of both worlds: 25–35% smaller than JPEG with transparency support
- GIF — Simple animations only; for static images, always use PNG or WebP instead
Optimal Quality Settings by Use Case
- Hero images & photography — 75–85% quality
- Blog thumbnails — 65–75% quality
- Product images (e-commerce) — 80–90% quality
- Social media — 70–80% quality
- Print — 90–100% quality
Impact on SEO and Core Web Vitals
Google's Core Web Vitals measure Largest Contentful Paint (LCP), which is heavily influenced by image load times. Properly compressed images directly improve LCP scores, which is a confirmed Google ranking factor. Every 100ms improvement in page load time can increase conversions by 1%.
Frequently Asked Questions
No. Image compression uses the browser's Canvas API — everything runs locally on your device. Your images are never sent to any server, making this tool 100% private and secure.
For web use, 70–80% quality is the sweet spot — typically 60–80% file size reduction with no visible quality loss. For photos you want to print, use 90%+. For thumbnails and previews, 50–60% is fine.
WebP is a modern image format by Google that produces 25–35% smaller files than JPEG at equivalent quality. It's supported by all modern browsers (Chrome, Firefox, Safari, Edge). For web use, WebP is almost always the best choice.
No server-side limit since processing is local. Practically, files up to 50MB work on most modern devices. Very large images (e.g. 100MP RAW) may be slow on older hardware.
Yes! Select multiple files at once using Ctrl+Click (or Cmd+Click on Mac), or drag multiple images into the drop zone. Use "Download All" to save all compressed images in one click.