Interactive genetic code reference
CodonTable
Standard genetic code chart for RNA codons, DNA triplets, amino acid codes, and translation checks
A codon table maps every three-nucleotide codon in mRNA to an amino acid or stop signal. Search by codon, amino acid name, or one-letter code, and compare DNA (T) with RNA (U).
FreeNo loginBrowser-basedStandard code chart
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Use this codon chart as a genetic code table, amino acid codon table, and quick codon dictionary for RNA codons, DNA triplets, start codons, and stop codons.
Popular codon lookups
Jump directly to codons students and researchers commonly search by name.
What you can check with this codon table
Codons and one-letter codes
Compare each RNA codon with its amino acid and one-letter code when reading sequence data.
Open amino acid codesCodons and tRNA
Match mRNA codons with complementary tRNA anticodons while reviewing translation.
Read the codon table guideStop codons
Check UAA, UAG, and UGA as translation termination signals in the standard genetic code.
Review stop codonsClassroom reference
Use the table for study notes, slides, and worksheets. Check attribution and terms before redistribution.
Open the codon tableUsing this table in notes or teaching materials
If you need a reusable codon table image or chart, make sure the RNA/DNA notation, attribution, and usage terms match your use case.
Featured utilities
CodonTable Tools
Essential CodonTable tools for codon table analysis, sequence conversion, and genetic research. Instant browser-based operation.
Curated toolbox
Essential Sequence Analysis Tools
Core tools for genetic code and sequence analysis
Codon Tools
More Codon Tools tools →Codon Table
Interactive codon table showing the genetic code with amino acid assignments and codon properties.
codon-table
genetic-code
interactive
DNA to Protein Converter
Convert DNA sequences to protein sequences with support for multiple genetic codes and reading frames.
dna-to-protein
sequence-conversion
genetic-codes
DNA to RNA Converter
Transcribe DNA sequences to complementary RNA sequences with FASTA format support.
dna-to-rna
transcription
fasta-support
RNA to Protein Converter
Translate RNA sequences to protein sequences with support for multiple genetic codes and reading frames.
rna-to-protein
translation
genetic-codes
Codon Wheel
Visual codon wheel representation of the genetic code for easy codon lookup and analysis.
codon-wheel
visualization
genetic-code
Codon vs Anticodon
Interactive tool to understand the relationship between codons and anticodons in protein synthesis.
codon
anticodon
protein-synthesis
MCAT Codon Guide
Practice codons, translation, reading frames, and start/stop signals with immediate feedback.
mcat
codon
translation
AP Biology Practice Questions
Practice AP Biology-style questions with unit-focused review and immediate feedback.
ap-biology
practice
unit-review
Online Sequence Analysis
More Online Sequence Analysis tools →
NCBI BLAST
Web-based sequence similarity search tool - paste sequence and find matches.
sequence-similarity
web-interface
database-search
Clustal Omega
Web-based multiple sequence alignment tool for proteins and nucleotides.
multiple-alignment
web-interface
fast
MUSCLE
Web-based multiple sequence alignment with high accuracy and speed.
multiple-alignment
web-tool
high-accuracy
T-Coffee
Web-based multiple sequence alignment with consistency-based scoring.
multiple-alignment
consistency-based
web-interface
EMBOSS Needle
Web-based pairwise sequence alignment tool using Needleman-Wunsch algorithm.
pairwise-alignment
global-alignment
web-tool
EMBOSS Water
Web-based local pairwise sequence alignment using Smith-Waterman algorithm.
pairwise-alignment
local-alignment
web-tool
ORF Finder
Web-based open reading frame finder for DNA sequences.
orf-finding
dna-analysis
web-tool
Translate Tool
Web-based DNA to protein translation tool with multiple reading frames.
translation
dna-to-protein
web-interface
Web Tools
More Web Tools tools →AlphaFold Protein Structure Database
Free database providing AI-predicted protein structures for millions of proteins across species.
protein-structures
AI-predicted
database
BLAST
Web-based sequence similarity search tool from NCBI for nucleotide and protein sequences.
sequence-similarity
NCBI
search
ClustalW
Web interface for multiple sequence alignment of DNA or protein sequences.
multiple-alignment
web-interface
DNA-protein
DAVID
Web-based functional annotation tool providing biological meaning behind large lists of genes.
functional-annotation
gene-lists
biological-meaning
Ensembl
Comprehensive web-based genome browser providing access to vertebrate genome annotation and analysis tools.
genome-browser
vertebrate
annotation
Enrichr
Comprehensive gene set enrichment analysis web server with extensive libraries of annotated gene sets.
enrichment-analysis
gene-sets
comprehensive
Galaxy
Open, web-based platform for accessible, reproducible, and transparent computational research.
open-platform
reproducible
computational-research
Gene Ontology
Web resource providing structured controlled vocabularies for gene and gene product attributes.
controlled-vocabulary
gene-attributes
structured
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