Performance budget

Hero Image LCP Estimator

Check how a hero image will display, how long it may take to download, and which compressed size to aim for before launch.

Waiting for image0/100

File size0 B

Needed pixels780×1040

Oversample—×

Download0 ms

Hero image

Upload a file or type width, height, and size. Either path is enough.

The image stays in this browser. It is not uploaded.

Source width (px)Source height (px)File size (KB)Format

Compressed size targets

Heuristic sizes after resizing to 780×1040 px. Actual encoding will vary.

JPEG174 KB

PNG713 KB

WebP111 KB

AVIF71 KB

LCP checks

These are local heuristics, not a lab Lighthouse run.

Upload an image or enter dimensions to estimate LCP risk.