The Big Lottery Fund has launched what it calls an "online conversation" about how £4bn of lottery funding should be spent between 2015 and 2021.
The exercise, called Your Voice, Our Vision, is open to everyone from charity professionals to the general public on a dedicated website.
People will be invited to share their opinions by registering on the website and submitting suggestions by mid-July.
The BLF wants feedback on four areas. "Vibrant communities" asks how the BLF can grow social capital and help communities play to their strengths; "addressing disadvantage" invites ideas on how best to support people living in poverty; "working together" asks how the BLF should share its own information for the benefit of others; and "a stronger sector" asks for opinions on how to support the development of the voluntary sector and social enterprises.
Clicking on the four subject areas on the website will allow visitors to see what ideas have already been put forward under "top-rated" and "most commented-upon" sections.
Contributions can be in the form of a blog, a film or a comment on another suggestion, as well as tweets.
The BLF, which made 12,000 grants worth a total of £778m in 2012/13, said the opinions expressed would inform its new framework, to be published in the spring of 2015. It will run until 2021, with a review in 2018.
"Our mission to help communities and those most in need hasn’t changed, but the world around us has, and we need to look at how we can adapt – what we can do better or differently," said Dawn Austwick, chief executive of the BLF. "We are not opening a traditional consultation – we are starting a dialogue, an exchange of thoughts and ideas, challenges and opportunities. We want people to be creative and honest in their responses."