Reduce image file size with a quality slider and JPG or WebP output without visible quality loss. Useful before upload to CMS or email. Compression is performed in the browser via canvas export.
Designed to process supported images locally in your browser. No signup required.
Upload a JPG or WebP image, set quality (about 75–85 for photos), choose output format, then compress and compare file sizes before downloading.
The image is drawn to a canvas and re-encoded at the selected quality. Photographic JPGs often shrink 50–80% with little visible loss; graphics may prefer lossless settings.
Smaller images load faster (better LCP), upload quicker to CMS tools, and fit email attachment limits—without a desktop editor.
Yes. Lossless compression keeps every pixel identical (usually 10-30% smaller). Lossy compression at quality 75-85 looks virtually identical to the human eye while reducing file size by 50-80%.
For photographs use quality 75-85 (80 is the sweet spot). For logos and graphics with few colors use lossless compression.
Yes, completely free. No signup, no limits, no watermark.
No. ToolBoxy is designed so supported image tools process data in your browser. Your files stay on your device.
Yes. Smaller images load faster, which improves Largest Contentful Paint (LCP) — one of Google’s Core Web Vitals ranking factors.