How to compress images without anyone noticing

Most image bloat is invisible to the viewer but very visible to a page-speed audit. The good news: you can usually cut 60–80% with no perceivable loss.

Why this matters today

Modern formats (WebP, AVIF) compress smarter than JPG by predicting nearby pixels and only encoding the surprises. Combine that with a sane resolution and you have most of the win.

Quality is what survives compression — not what was there before it.

In practice

Here is the part that turns theory into a habit:

• Start small — a single file, a single page, a single test.
• Measure twice. Trust the numbers, not the vibe.
• Keep an undo path. Reversible decisions buy you courage.

A note on tooling

Every tool on this site runs in your browser unless we say otherwise. That changes the trade-offs: nothing to upload, nothing to retain, nothing to leak. The downside is a small ceiling on file size and a dependency on your device's CPU — both acceptable for most editorial workflows.

Takeaway

Pick the right format, downsample to display size, and trust your eyes — not the file inspector.