Here are popular places to buy dresses online in Singapore (options for different budgets and styles):

• Zalora — big regional fashion marketplace with local and international brands, wide range of styles and price points. (jalora.com.my)
• Love, Bonito — Singapore-based womenswear brand (good for workwear, dresses tailored for Asian fits). (lovebonito.com)
• Pomelo — regional fast-fashion brand with trendy dresses and frequent new drops. (stylicy.com)
• H&M Singapore — affordable basics and seasonal dresses with local online store. (www2.hm.com)
• SHEIN — very large selection at low prices (fast-fashion; check shipping/returns). (reuters.com)
• ASOS — wide international selection and brands (ships to Singapore; good for occasion and trend pieces). (ASOS.com)
• Shopee & Lazada — marketplaces where you can find everything from budget fast-fashion to branded items and local sellers. Good for bargains and variety. (h5.lazada.sg)
• The Editor’s Market, Charles & Keith, The Closet Lover and other local labels — for more Singapore-styled and boutique options (available online or via regional marketplaces). (carousell.sg)

Tips:

• If you want sustainable / higher-quality pieces, prioritize local brands or established retailers (Love, Bonito, The Editor’s Market, Pomelo). (lovebonito.com)
• For the cheapest options, check Shopee/Lazada/SHEIN but read reviews and shipping/return terms first. (h5.lazada.sg)
• Use filters (size, length, occasion, material) and check size charts — Asian sizing can differ from US/EU sizing.

If you want, tell me your budget, preferred style (casual / work / party / bridesmaid), or size and I’ll give a short curated list of specific dresses and links.