Effectively all of a company’s value is represented in stock (common & preferred). The actual value of the stock is negligible (see the par value). To increase the number of shares that can be issued, a vote has to go before the common shareholders. Whether this vote is binding – Need to check with the legalese with respect to the state that a company is incorporated in.
What you might want to look at is the number of shares issued vs shares outstanding. Check book value per share vs actual share price. Does the potential or historical growth justify the difference between book value and share price? Also look if there is a pattern of issuing more shares for operations (as opposed to using issued shares for acquisitions). Also look at the free cash flow as well as EBITDA Will the company need to do something like issuing more stock to finance ongoing operations.
As for any one place that has all of these factors without having to enter data.. That is a different question. Some brokerages may have the data available to filter on.