A service of the
International Union of Crystallography

checkCIF reports on the consistency and integrity of crystal structure determinations reported in CIF format.

Please upload your CIF using the form below. [Help]

File name:

Select form of checkCIF report
PDF email (recommended for CIFs that might take a long time to check)

Select validation type
Full validation of CIF and structure factors
Full IUCr publication validation of CIF and structure factors
Validation of CIF only (no structure factors)

Output Validation Response Form
Level A alerts only
Level A and B alerts
Level A, B and C alerts

This version of checkCIF includes checks on:

  • CIF syntax and construction
  • Cell and geometry details
  • Space-group symmetry
  • Anisotropic displacement parameters
  • Structure factors

Useful links

Prepublication check for submissions to IUCr journals
Details of checkCIF/PLATON tests
CIF dictionary
Download CIF editor (publCIF) from the IUCr
Download CIF editor (enCIFer) from the CCDC

checkCIF is
sponsored by

[IUCr Journals]

[Cambridge Crystallographic Data Centre]

[American Chemical Society]




[Royal Society of Chemistry]

[Chemical Society of Japan]