DNA to RNA converter
Convert DNA sequences to RNA (transcription). Replaces thymine (T) with uracil (U). Upload a FASTA file or paste your sequences below.
What is DNA to RNA conversion?
Transcription is the process by which cells copy DNA into RNA. In DNA, the four nucleotide bases are adenine (A), thymine (T), guanine (G), and cytosine (C). RNA uses uracil (U) instead of thymine—so transcription replaces every T with U while preserving the other bases.
This DNA to RNA converter performs that substitution: ATGC becomes AUGC.
How to use DNA to RNA conversion online
Paste or upload DNA sequences, and the converter instantly produces the corresponding RNA. Processing happens in the browser with no server round-trip.
Inputs
| Input | Description |
|---|---|
| DNA sequence | Raw sequence or FASTA format. Accepts .fasta, .fa, .fas, .seq, .txt files up to 50 MB. |
Settings
| Setting | Description |
|---|---|
Output case | UPPERCASE, lowercase, or preserve original case. Default: uppercase. |
Line wrapping | Wrap output at 60 or 80 characters per line, or output as a single line. Default: 80. |
Validate input sequences | Check that input contains only valid DNA bases (A, T, G, C, N). Enabled by default. |
Add suffix to headers | Append _rna to FASTA sequence headers. Enabled by default. |
Output
RNA sequence(s) in the same format as the input. FASTA headers are preserved (with optional suffix).
Related tools
- RNA to DNA converter: The reverse operation—converts U back to T
- DNA to Protein converter: Translate DNA through codons to amino acid sequences
- Reverse complement: Generate reverse, complement, or reverse-complement of DNA/RNA
- GC Content calculator: Calculate the percentage of G and C bases in a sequence