Notes

Things found out while building these tools, measured where they can be, how-tos for the things that took a while to work out, and the datasets published along the way, marked Dataset. Follow along with the RSS feed.

  1. Deleting a page from a PDF may not remove it

    Removing a page from a PDF can leave its contents inside the file, hidden but recoverable. Why that happens, how to check, and how to delete for real.

  2. What JPEG quality should you use?Dataset

    What quality 60, 75 or 95 actually does to a JPEG's size and quality: measured curves from the exact encoder this site runs in your browser, free to download.

  3. WebP vs JPEG: how much smaller, really?Dataset

    WebP against JPEG at equal measured quality: about a third smaller on photographs, more on graphics. Measured with the encoders this site runs in your browser.

  4. Which colours LEGO 1×1 plates come inDataset

    Which of the 51 current LEGO® colours are really produced as a 1×1 plate or tile, and how many recent sets contain each one. Free to download as CSV or JSON.