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Supports JPG, PNG, WebP — processed in your browser

Reduce a JPG, PNG, or WebP image's file size by adjusting compression quality, with a live preview of the size savings — processed entirely in your browser.

How It Works

How Image Compressor Works

This tool runs entirely client-side: your image is never uploaded to a server. It loads your image into an HTML5 canvas element, then re-exports it using the browser's native canvas compression at a quality level you control with a slider.

For JPEG and WebP output, lowering the quality setting increases the amount of lossy compression applied, which reduces file size at the cost of some fine detail — the tool shows you the resulting file size in real time so you can find the right balance.

Because compression happens through the browser's built-in canvas.toBlob export function rather than a specialized image codec, results are broadly comparable to saving a "web quality" JPEG from any standard image editor.

Worked Example

See It In Action

A 4.5 MB photo straight from a smartphone camera can be compressed down to roughly 400–600 KB at 80% quality with barely noticeable visual difference — a size much friendlier for email attachments or web pages.
FAQ

Frequently Asked Questions

Is my image uploaded to a server?
No — compression happens entirely in your browser using canvas rendering and export. Your image file never leaves your device.
Which formats can I compress?
JPG, PNG, and WebP are supported — note that PNG is a lossless format, so its size reduction from quality adjustment alone is more limited compared to JPG or WebP.
How do I know how much smaller my file got?
The tool shows the resulting file size live as you adjust the quality slider, so you can compare it directly against the original size before downloading.