Contact

Use this form to report a result that does not reproduce, a bug in one of the browser tools, a broken link, an image credit that needs fixing, or a privacy or accessibility problem. Messages are read by the person who runs the tests.

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Reporting a result that does not match ours

The most useful reports let us re-run the same test. Please include:

• the URL of the guide and the table or sentence in question;
• your operating system, browser and version, and the encoder or library versions you used;
• the exact command, script or settings, and whether you used our published CSV and scripts or your own images;
• your numbers, even if they are only a few rows.

We will re-run the test on our bench. If your result holds, we correct the guide and credit the correction in the changelog (without your name unless you ask for it).

Before sending files

The form accepts text only. Do not paste passwords, private HAR files, client images or anything confidential. If an image is needed to show a problem, describe it first and we will reply with a way to share a public, non-sensitive copy. You can also write to hello@imageloadlab.com.

Tool bugs

For the image optimizer or the srcset builder, tell us the browser version, the input type (JPEG, PNG or WebP, and its pixel size) and what you expected to happen. Both tools run entirely in your browser, so we never see the file you used.

Response time

We aim to reply within five business days. Reports that include a reproducible test are handled first.