Compress Image
Choose a target size while keeping the original resolution
Drop your files here
Click to choose a file
Supported: PDF · JPG · PNG · WebP
Drop several images at once for batch processing
Up to 50 MB per file
Compress JPG, PNG, and WebP images for faster page loads, marketplace upload limits, or smaller email attachments. JustFileKit processes every image directly in your browser, so your originals are never uploaded or stored on a server.
Drop your images in, choose the maximum output size as a percentage of the original, then process and download. The recommended 60% setting balances file size and visual quality; quick presets also offer 40% for smaller files and 80% for clearer output. Resolution stays unchanged, while the exact output size varies with image content.
Frequently asked questions
- Does the percentage mean quality or file size?
- It is the target maximum file size relative to the original, not a fixed quality score. At 60%, a 10 MB image is compressed toward 6 MB or less, though the exact result depends on its content.
- Will compression make my images blurry?
- Compression discards some image data but keeps the original width and height. Start with the recommended 60%; use 80% if small text, fine lines, or gradients lose too much detail.
- Which formats are supported, and is PNG lossless?
- JPG, PNG, and WebP are supported. JPG and WebP usually shrink the most. Significant PNG reduction lowers the color count, so it is not fully lossless; keep important originals separately.
- Do my files get uploaded?
- No. Compression runs entirely in your browser and your images never leave your device.