How to calculate the true percentage holdings of a portfolio that's mixed with multiple ETFs and stocks?

I have a handful of ETFs, like VT, VXUS, QQQ, IOO, SOXX, VOO, in addition to individual stocks for a handful of standout companies I like. But some of these ETFs claim to have "the top 100 global companies", but then something like Exxon Mobil will be in the top 10, when it's really more like #20, so it's deceiving or at least not immediately clear what they are using to rank the weights of their holdings. I know I can just look up like Morningstar or Fidelity reports on their holdings, but is there like some website or tool I can use to just type how many shares I have of each stock and ETF, and then it pulls the current prices and % holdings of the ETFs to calculate what the percentage makeup of your portfolio is? I just want to better understand what's in my portfolio and what's not at a glance. I can't find anything that does this.