Image Compressor

A blog post loads noticeably slower when its featured image is a 3 MB file straight off a camera. Most of that size is invisible to the eye — JPEG compression can often cut file size by 60-80% with a quality setting most viewers won't notice. This tool re-encodes an image at a quality level you choose, right in your browser, and shows you exactly how many kilobytes you saved.

How to pick a quality setting

80% quality is a reasonable starting point for most web images — it usually cuts file size substantially with minimal visible loss. Photos with lots of fine detail (like textures or busy backgrounds) tend to tolerate lower quality settings better than images with large flat areas of color or text, which can show visible blocky artifacts if compressed too aggressively. Try 60% first if file size matters more than perfect visual fidelity, like for a thumbnail.

Why this matters for websites specifically

Google's Core Web Vitals and page-speed rankings factor in how quickly a page's images load — a site full of uncompressed photos can lose search ranking purely due to poor load times. Compressing images before uploading them to a WordPress site or online store also reduces hosting storage and bandwidth costs over time, which adds up across a site with dozens or hundreds of product photos.

Frequently Asked Questions

Will compression make my image blurry? At high quality settings (70%+), the difference is usually invisible to the eye; going below 40-50% starts to introduce visible blockiness, especially in photos with sharp edges or text.

Does this work on PNG files? The tool converts the output to JPEG format, which compresses far better than PNG for photos — if you need to preserve transparency (which JPEG doesn't support), this isn't the right tool for that specific case.

Is the image uploaded anywhere during compression? No — the entire process runs locally using your browser's Canvas API; nothing is sent to a server.