🧫Codon Table
The complete standard genetic code — click any codon for details, or switch to translate mode to convert an mRNA sequence into its amino acid chain.
Free Codon Table
Need to look up a codon fast, or translate a full sequence? Our free Codon Table gives you the complete standard genetic code in one interactive grid. Click any of the 64 codons to see its amino acid, one- and three-letter codes, and side-chain properties — with start and stop codons clearly marked so you never mix them up.
Search by codon, amino acid name, or letter code to jump straight to what you need. Switch to translate mode to paste in an mRNA sequence and get the full amino acid chain instantly, choosing your reading frame and stopping automatically at the first stop codon — just like real translation.
Whether you're memorizing the genetic code, working through a molecular biology problem set, or translating a sequence for a lab report, this tool has it covered. No sign-up, completely free. See the About page or the FAQ for more.
About the Codon Table
Features
Full 64-codon grid
Every codon shown with its 3-letter and 1-letter amino acid code, grouped by first and second base.
Search & filter
Find a codon instantly by typing the codon, amino acid name, or letter code.
Amino acid detail panel
Full name, side-chain property, and codon degeneracy for any selected codon.
mRNA translator
Paste a sequence, choose a reading frame, and get the amino acid chain, stopping at the first in-frame stop codon.
Frequently Asked Questions
What is a codon table?
A reference chart mapping all 64 possible three-base mRNA codons to the amino acid (or stop signal) each one encodes.
How do I use this codon table?
Browse the grid or search by codon, amino acid name, or letter code; click any codon for full details.
Which codon is the start codon?
AUG, which also encodes methionine and signals the ribosome where translation begins.
Which codons are stop codons?
UAA, UAG, and UGA — none of these encode an amino acid; they signal translation to stop.
Can I translate a full mRNA sequence?
Yes, switch to translate mode, paste your sequence, choose a reading frame, and get the amino acid chain instantly.
What if I paste a DNA sequence instead of mRNA?
It's automatically converted to mRNA (T→U) before translation.
Why are codons color-coded?
Start and stop codons are highlighted so you can spot them at a glance.
What does codon degeneracy mean?
Most amino acids are encoded by more than one codon; the detail panel shows how many codons map to the same amino acid.
Is this tool free?
Completely free, no sign-up or downloads.
Does it work on mobile?
Yes, the grid and translate mode are both fully responsive.