Organisers of Sydney's New Year's Eve celebrations say Friday night's fireworks will feature never-before-seen effects.

Lightning bolts, bow ties and double hearts will be some of the firework effects that audiences will see when Sydney welcomes in the new year.

Creative director Rhoda Roberts says this year's theme will encourage people to think about the legacy they leave behind as we move into a new decade.

The Sydney Harbour Bridge will light up with various symbols including a peace sign.

The 9pm (AEDT) family fireworks will see a red and white checkerboard waterfall tumble from the bridge.

Fireworks director Fortunato Foti says he is excited about the new fireworks designs.

"I claim it to be the biggest and best in the world, and hopefully it'll be no different this year," he said.

"We sort of lead the way, not only in technology but the beautiful place that we like to do the fireworks display."

In total, about 7,000 kilograms of pyrotechnics will be launched from barges, buildings and the bridge.

The New Year's Eve celebrations will cost around $5 million.