WASHINGTON — House lawmakers on Friday introduced sweeping antitrust legislation aimed at restraining the power of Big Tech and staving off corporate consolidation. If passed, the bills would be the most ambitious update to monopoly laws in decades.

The bills — five in total — take direct aim at Amazon, Apple, Facebook and Google and their grip on online commerce, information and entertainment. The proposals would make it easier to break up businesses that used their dominance in one area to get a stronghold in another, would create new hurdles for acquisitions of nascent rivals and would empower regulators with more funds to police companies.

The legislation could reshape the way the companies operate. Facebook and Google, for instance, could have a higher bar to prove that any mergers aren’t anticompetitive. Amazon could face more scrutiny when selling its own branded products like toilet paper and clothing. Apple could have a harder time entering new lines of business that are promoted on its App Store.

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“Right now, unregulated tech monopolies have too much power over our economy. They are in a unique position to pick winners and losers, destroy small businesses, raise prices on consumers and put folks out of work,” said Representative David Cicilline, Democrat of Rhode Island and chairman of the antitrust subcommittee. “Our agenda will level the playing field and ensure the wealthiest, most powerful tech monopolies play by the same rules as the rest of us.”

The introduction of the bills, which have some bipartisan support, is the most aggressive challenge yet from Capitol Hill to Silicon Valley’s tech giants, which have thrived for years without regulation or much restraint on the expansion of their business. Last year, the antitrust subcommittee released a scathing report about the industry after a 16-month investigation, declaring that Amazon, Apple, Facebook and Google engaged in a variety of monopolistic behavior. The proposals released on Friday try to address the concerns detailed in the report.