Terms of use.

These terms apply to codonchart.com. By using the site you agree to them. They were last updated on October 26, 2026.

What the site is

Codon Chart is a free genetic-code reference: codon charts and wheels, amino acid references, practice worksheets and sequence tools that run in your browser. The sources and methods page describes where its data comes from and how it is checked. Results are reference and teaching aids; they do not establish genes, expression, protein function or whether a sequence suits lab work.

Using it

Use the charts, worksheets and tools freely for learning, teaching and research, including printed and projected copies for a class. Charts and files you download are yours to use; if you publish them, please credit "Codon Chart (codonchart.com)".

Please do not overload the site with automated requests, copy the site as a whole, or probe it for vulnerabilities.

Third-party material

The genetic codes, amino acid structures and property values come from the sources named on the sources and methods page, which keep their own terms. The Inter typeface is used under the SIL Open Font License.

No warranty

The site is provided "as is" and "as available", without warranties of any kind, including accuracy, fitness for a particular purpose or uninterrupted availability.

Limitation of liability

To the fullest extent the law allows, we are not liable for any loss or damage arising from your use of the site or reliance on it. Nothing here limits liability that cannot be limited by law.

Changes and contact

We may update these terms; the date above shows the last change. Contact: hello@codonchart.com.