ImageGuide

Advice needs somewhere to be tested

I have written about product images since 2018. Questions keep returning: which format, what dimensions, when to lazy-load and how to tell whether a change helped.

ImageGuide collects the reference material, practical guides and conversion tools. The browser extension applies those questions to an open page. Press handles local files.

The site is powered by Sirv. It is part of the same image work, not an independent review of Sirv.

The extension keeps the uses separate

One file can appear in several places. The auditor groups the shared resource but retains each element’s dimensions and markup findings. A hero and a small card do not need the same image size or alt text.

Version 0.4.0 adds a persistent audit view, response-size checks and browser observations for LCP and layout shifts. The screenshot above comes from the repository’s captures for that version. Its numbers describe the captured page, not a benchmark for the extension.

The build note follows the distinction between response bytes, per-element findings and projected savings.

Permission follows the action

The normal audit starts when the user clicks the extension. It does not automatically transmit the report to ImageGuide. Optional cross-origin response-size checks request the permission they need and make requests without credentials.

A browser audit does not rewrite the site’s files. The report can be copied as Markdown or JSON for the person doing that work.

The files need their own tool

Converting a few images in a web tool and processing a folder of photographs are different jobs. Press provides local comparison and conversion. ImageGuide explains the choices and helps identify what is worth fixing.

Open the guides or get the Chrome extension.