The best replacement for multiline textbox is textarea.

The best alternatives to multiline textbox are rated as following:
★★★★★  textarea

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Speaking about multiline textbox, one probably shouldn't forget about maxlength.

Other search terms related to multiline textbox and their ratings are:
★★★★★ maxlength
You have in mind a companion for multiline textbox and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of multiline textbox in all years. Click on graph for more.
multiline textbox
textarea