On a broader scale, you can examine a company's perks and benefits for clues about their values. For instance, are the health insurance and vacation time generous? Does the company offer maternity and/or paternity leave? Even if you don't have a family, these aspects can give you an idea of the company's priorities.
One piece of advice - some companies provide free meals at work, which is fantastic because it's cost-free. However, the underlying message might be that employees should save time by eating at the office rather than taking a break. So, always remember to take the breaks you need for a balanced work-life experience.
While having positive core values and mission statements is essential, they alone are not enough. It can be challenging to tell which organizations invest time, training, and incentives or rewards to support these values. To gain insight into a company's reputation, pay attention to employee feedback. You can find information on employee concerns on websites like https://www.teamblind.com/.
Once you've conducted your research, don't hesitate to ask about culture and employee well-being during interviews. Observe how your interviewers respond to the question as well as what they say.
Organizations, much like people, all have their flaws. Some are better than others, and even the best ones may have aspects that are deal-breakers for some and tolerable for others. Do your best to understand what you're getting into beforehand, but know that you'll need to work a place for a while to know what it's like for you. If you encounter a deal-breaker, continue searching for a better fit.