<p>There's a great tool on the fansite <a rel="nofollow" href="https://tibiapal.com/bosstimers">TibiaPal</a>, that you can use. It doesn't include all bosses but you can simply click on the image to start the timer. You can close the browser you just need to make sure you go back to the same browser in order for the timer to work. Alternatively like already mentioned, you can go to your auto Tibia screenshots if Tibia screenshots<strong> (make sure you have them enabled the checkmark to get auto screenshots when a boss is defeated to check the times that you killed the creature there defeated) </strong>You can also check out a supported fansite like <a rel="nofollow" href="https://tibia.fandom.com/wiki/Main_Page">TibiaWiki</a> to check see how long the boss cooldown is.</p><p>I'm is for and use do some math using an online calculator.</p><p>I'm going to copy from this source: <a rel="nofollow" href="https://www.tibiaqa.com/321/where-are-auto-screenshots-from-the-tibia-client-stored">TibiaQA question- Where are auto screenshots from the Tibia client stored?</a></p><ul><li>They are stored in the same location where the Tibia client is installed.</li><li>The path is <em>Tibia/packages/Tibia/screenshots</em></li><li>You can easily open that directory going to <strong>Options > Misc > Screenshots </strong>and clicking "Open Screenshot Folder" button.</li></ul><p><img alt="" src="https://www.tibiaqa.com/?qa=blob&qa_blobid=2602627482416445816" style="height:383px; width:600px"></p>