Called the Accountability Act, the sweeping legislation will affect public agencies, public services and elected officials.
Sources have told CBC News the legislation will include the creation of a new patient ombudsman with power to investigate complaints about hospitals and long-term care homes, areas the current provincial ombudsman has long said need better oversight.
The province's child and youth advocate would also get more power to investigate cases.
When it comes to MPPs, the legislation includes a plan to post their attendance and voting records online.
Public agencies like Ontario Power Generation and Metrolinx that have come under fire in the past for their spending would also be subject to greater scrutiny.
The opposition has repeatedly accused the Liberal government of poor oversight, leading to the waste of taxpayer dollars.
Wynne will announce the legislation later this morning, it's expected to be formally introduced in the house later this month.