Image Compressor

Reduce image file size without losing visible quality. Runs entirely in your browser — no uploads.

Drop image here or click to upload

Supports JPEG, PNG, WebP, GIF

How does image compression work?

This tool uses the HTML5 Canvas API to redraw your image at the quality level you set, then exports it as a JPEG or WebP file. JPEG uses lossy compression — some image data is discarded to achieve smaller file sizes. Lower quality settings remove more data (invisible at moderate settings, but visible at very low quality).

What is the best quality setting?

80–85% — recommended for most images. Looks identical to the original but is typically 60–70% smaller.
60–75% — good for web use where file size matters more than perfection.
Below 60% — noticeable quality loss. Only use for thumbnails or placeholder images.

Is my image uploaded anywhere?

No. All processing happens locally in your browser using JavaScript and the Canvas API. Your image never leaves your device.

Why does my PNG get converted to JPEG?

JPEG compression is much more effective for photographs than PNG. PNG uses lossless compression and is best for images with transparent backgrounds, sharp edges or text (logos, screenshots). For photos, JPEG at 80% is often 5–10× smaller than PNG.