What DNA letters are valid?

Only A (adenine), T (thymine), G (guanine), and C (cytosine) are valid. The tool ignores spaces and converts lowercase to uppercase automatically.

What is the complementary strand rule?

A pairs with T (and vice versa), while G pairs with C. The complementary strand is written 3′ to 5′ antiparallel to the input.

How is mRNA produced?

mRNA is synthesized from the template (complementary) strand, so it matches the coding strand with T replaced by U (uracil).

What are stop codons?

UAA, UAG, and UGA are stop codons — they signal the ribosome to terminate translation. The protein chain ends at the first stop codon encountered after the start codon AUG.

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DNA / RNA Translator

Translate DNA sequences to complementary DNA, mRNA, and protein chains with codon-by-codon breakdown.

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About this tool

Enter a DNA sequence (A, T, G, C) and instantly get the complementary DNA strand, the corresponding mRNA transcript, and the translated protein using the full 64-codon genetic code table. The tool highlights start codons (AUG), stop codons, GC content percentage, and shows each codon's amino acid using standard 3-letter abbreviations.

How to use

1 Step 1: Type or paste a DNA sequence using the letters A, T, G, and C into the input field.
2 Step 2: The tool automatically computes the complementary DNA strand and the mRNA transcript.
3 Step 3: Click 'Translate to Protein' to run the codon table lookup and display the protein chain.
4 Step 4: Review the codon-by-codon breakdown, highlighted start/stop codons, and GC content percentage.

About this tool

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