Speaking at a congressional hearing in Washington, executive chairman Eric Schmidt said: "May I simply say that I can assure you we're not cooking anything."
The Senate Judiciary subcommittee on anti-trust is considering whether Google abuses its market position, as is the US Federal Trade Commission.
"Google does nothing to block access to any of the competitors and other sources of information," he explained at the hearing.
Mr Schmidt also conceded that Google has something veering towards a monopoly of the market, meaning the firm has a special responsibility because of its market power.
But he added that Google has learnt lessons from Microsoft, which was forced to pay multi-billion dollar fines due to its monopolistic business practices.
Google also faces a further continuing investigation by the European Commission.
Posted by Simon Jones
