For investors looking to diversify their portfolios and gain exposure to strong-performing sectors or indices, exchange-traded funds (ETFs) can be a great way to do it.

That's because ASX ETFs offer a simple, cost-effective way to invest in a broad range of companies without the need to pick individual stocks.

Here are five funds that could be worth considering in March.

iShares S&P 500 ETF (ASX: IVV)

If you want exposure to the world's biggest and best companies, the iShares S&P 500 ETF (IVV) is a solid choice. This fund tracks the S&P 500 Index, which includes 500 of the largest US-listed companies, covering sectors such as technology, healthcare, and consumer goods.

With holdings in giants like Apple, Microsoft, and Amazon, this ETF has delivered strong long-term returns. Historically, the S&P 500 has returned around 10% per annum on average, making this fund an attractive option for long-term investors looking to build wealth.

VanEck Morningstar Wide Moat ETF (ASX: MOAT)

For investors looking to focus on high-quality businesses with strong competitive advantages, the VanEck Morningstar Wide Moat ETF is worth considering.

This ASX ETF selects US-listed companies that are judged to have significant and sustainable competitive advantages—or moats—that allow them to outperform over the long run. Some of its holdings include tech behemoths, consumer giants, and industrial leaders. Its focus on moats has underpinned market-beating returns over the past decade.

Betashares Asia Technology Tigers ETF (ASX: ASIA)

The Asian region is home to some of the world's most innovative and fastest-growing technology companies and the Betashares Asia Technology Tigers ETF provides exposure to them.

This ASX ETF taps into the rising demand for digital services, e-commerce, and artificial intelligence across Asia. Given the region's strong economic growth and increasing tech adoption, it could be a great option for investors looking to diversify beyond US and Australian markets.

Its holdings include leading Asian tech companies Alibaba, Tencent, and PDD Holdings.

Vanguard Australian Shares Index ETF (ASX: VAS)

For those looking for broad exposure to the Australian share market, the Vanguard Australian Shares Index ETF is one of the best ways to do it. This ASX ETF tracks the S&P/ASX 300 Index, covering the largest 300 companies on the ASX.

It provides a well-diversified portfolio that includes blue-chip companies such as BHP Group (ASX: BHP), Commonwealth Bank of Australia (ASX: CBA), and CSL Ltd (ASX: CSL). It could be a great core holding for investors wanting steady long-term growth and reliable dividend income from Australia's top companies.

BetaShares S&P/ASX Australian Technology ETF (ASX: ATEC)

Finally, the Australian tech sector has been growing rapidly in recent years, and the BetaShares S&P/ASX Australian Technology ETF allows investors to capitalise on this trend.

It provides investors with exposure to some of the biggest and most promising tech stocks in Australia, this includes Xero Ltd (ASX: XRO) and WiseTech Global Ltd (ASX: WTC). With the digital economy continuing to expand, this fund offers investors a way to tap into local tech innovation while diversifying their portfolios. Betashares recently tipped ATEC as one to buy.