After testing a dozen tools, here are the top 3 reliable options (as of the current web):

: Go back to Cookie Clicker’s Options menu, click "Import Save" , paste the new string, and click Load . Version Compatibility

// --- Edit these values as you want --- decoded.cookies = "1e30"; // Cookies in bank decoded.cookiesEarned = "1e30"; decoded.heavenlyChips = 1000000; // Heavenly chips decoded.prestigeHeavenlyChips = 1000000; decoded.prestigeLevel = 500; // Prestige level // -------------------------------------

: Open a tool like the Cookies Save Editor and paste your string into the Import box.