Are you looking to make some portfolio changes this month? If you are, then it could be worth checking out some exchange-traded funds (ETFs).

But which ones could be great options for buy and hold investors in April?

Well, three highly rated ASX ETFs to consider right now for the long term are listed below. Here's what you need to know about these top options:

If you are bullish on the long-term outlook of the Asian economy, then the BetaShares Asia Technology Tigers ETF could be a great ASX ETF for investors to buy and hold.

This popular ETF gives investors access to the best tech stocks in the region. Many of these are the region's equivalents of the West's biggest and best tech companies.

Among the fund's holdings are e-commerce giant Alibaba, search engine leader Baidu, iPhone manufacturer Taiwan Semiconductor Manufacturing Company, WeChat owner Tencent, and Temu owner Pinduoduo.

Another ASX ETF for buy and hold investors to look at in April is the Betashares Global Uranium ETF. As you might have guessed from its name, this ETF aims to track the performance of an index that provides investors with exposure to a portfolio of leading companies in the global uranium industry.

This could be a great time to gain exposure to this side of the market. Betashares points out that nuclear power is increasingly being accepted as a safe, reliable, low-carbon energy source. As a result, demand for the chemical element is expected to increase materially in the future.

This bodes well for the companies held by the fund. This includes the biggest players in the global uranium market, as well as locally listed uranium miners Boss Energy Ltd (ASX: BOE) and Paladin Energy Ltd (ASX: PDN).

Finally, buy and hold investors might want to check out the Vanguard All-World ex-U.S. Shares Index ETF. Particularly if they already have a lot of exposure to the U.S. market in their portfolio directly or through other high-quality ETFs like the BetaShares NASDAQ 100 ETF (ASX: NDQ).

That is because this ETF offers investors easy access to a massive ~3,500 companies listed in developed and emerging markets across the globe but excluding the United States.

Among the ETF's holdings are HSBC Holdings, LVMH Moet Hennessy Louis Vuitton, Samsung, and Taiwan Semiconductor.