NMR

​https://www.chemguide.co.uk/analysis/nmrmenu.html#top

http://www.cryst.bbk.ac.uk/PPS2/projects/schirra/html/home.htm

http://www.spincore.com/nmrinfo/

https://teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/nmr1.htm

IR

https://www.colby.edu/chemistry/JCAMP/IRHelper.html

https://webbook.nist.gov/chemistry/quant-ir/

https://pslc.ws/macrog/ir.htm

https://www.chemguide.co.uk/analysis/irmenu.html#top

http://www.umsl.edu/~orglab/documents/IR/IR2.html

MS

​ 

https://masspec.scripps.edu/

https://www.chemguide.co.uk/analysis/masspecmenu.html

UV

https://webbook.nist.gov/chemistry/uv-vis/

https://www.chemguide.co.uk/analysis/irmenu.html#top

Database

2483 compound database at Virginia Tech. 

https://www.colby.edu/chemistry/cmp/cmp.html

Spectral Database for Organic Compounds

 http://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgi

NMRDB (NMR prediction database) 

http://www.nmrdb.org/