The maps will detail crime statistics at council ward level
Three Welsh police forces have launched interactive crime maps on their websites, with a fourth due to go live by the end of the week.
The maps will allow local residents to see the latest local crime information, including where incidents have happened and how crime is being tackled.
The maps are part of a UK government commitment made earlier this year to strengthen community engagement.
South Wales, Gwent and North Wales' maps went online from Wednesday.
Crimes detailed online
Violence against a person
Number of anti-social behaviour reports
Dyfed-Powys's site is expected to be ready on Friday once translations have been completed.
The maps can be reached from the front page of the forces' websites and will enable readers to view data by ward level, check if crime rates are below or above average, and compare them to the same time the previous year.
Users can input postcodes into the interactive maps to identify different kinds of crime.
South Wales Police assistant chief constable Nick Croft said: "The site allows us to give much clearer information to our communities in relation to levels of crime on a ward by ward basis.
"The crime mapping site will complement our neighbourhood policing website, enabling people to see what is being done to tackle local priorities and contribute towards on going police and partnership activity."
Chief Insp Simon Jeffreys from Gwent Police said the maps would give people an "accurate picture of crime in their communities".
North Wales' Deputy Chief Constable Clive Wolfendale added: "Our website now offers lots of ways for the public to interact with the force and we are developing new services all the time".
Dyfed-Powys Police Assistant Chief Constable Nick Ingram said the maps enabled the force to show how safe the area was with "relatively low levels of crime and high detection rates".