The Proceedings of the Old Bailey, London’s Central Criminal Court have been online for a while, covering 1674-1834.
Recently a further 100,000 criminal trials have been added to the website and the time frame now covers 1674-1913. Digitised images of the original court proceedings are attached to records. You can search on a persons name, but also by offence, verdict and punishment.
This is a great resource if you are researching convicts from England processed through the Central Criminal Court and it’s free!