🗜️ Reduce Image Size in KB — Free, No Watermark
Reduce image file size in kilobytes online free. 100% browser-based — no upload to server, no watermark, no signup required. Supports JPG, PNG, and WebP.
Reduce Image Size in KB
All processing happens 100% in your browser (Canvas API). Images never leave your device and are never stored on any server.
Frequently Asked Questions
Does reduce image size in kb reduce image quality?
Lossy compression (JPEG) slightly reduces quality to achieve a much smaller file size. For most web use cases, the difference is imperceptible. Use the quality slider to find the sweet spot for your image.
Is my image uploaded to a server?
No. All compression is done using the HTML Canvas API directly in your browser. Your images never leave your device and are never sent to any server.
What is the best format for compressed images?
WebP is 25-35% smaller than JPEG at the same quality and supports transparency. For photos, JPEG/WebP is ideal. For graphics with transparency, WebP or PNG is best.