Is there a dictionary of standard character variants?
[中文]
http://www.zdic.net/z/18/zy/5B87.htm

[EN]
https://en.wiktionary.org/wiki/%E5%AE%87

other useful dictionary


http://chinese-linguipedia.org/clk/search/%E5%AE%87/86588/182973?srchType=1
http://humanum.arts.cuhk.edu.hk/Lexis/lexi-mf/search.php?word=%E5%AE%87
http://dict.variants.moe.edu.tw/yitia/fra/fra01006.htm
http://www.chineseetymology.org/CharacterEtymology.aspx?characterInput=%E5%AE%87