Findings, measurements, datasets and how-tos from Richard Bailey.https://tabotter.com/en-gbhttps://tabotter.com/notes/deleting-a-pdf-page-may-not-remove-it/https://tabotter.com/notes/deleting-a-pdf-page-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.Mon, 05 Oct 2026 00:00:00 GMThello@tabotter.com (Richard Bailey)https://tabotter.com/jpeg-quality-settings/https://tabotter.com/jpeg-quality-settings/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.Wed, 02 Sep 2026 00:00:00 GMTDatasethello@tabotter.com (Richard Bailey)https://tabotter.com/webp-vs-jpeg/https://tabotter.com/webp-vs-jpeg/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.Wed, 02 Sep 2026 00:00:00 GMTDatasethello@tabotter.com (Richard Bailey)https://tabotter.com/lego-1x1-plate-colors/https://tabotter.com/lego-1x1-plate-colors/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.Wed, 05 Aug 2026 00:00:00 GMTDatasethello@tabotter.com (Richard Bailey)