Free biology tools.
Clearer discoveries.
Explore DNA, RNA and proteins. Translate sequences, discover the genetic code and check composition—all in your browser.
Find your biology tool
From a single codon to your next sequence analysis.
Showing 10 of 10 tools
DNA to Protein Translator
Translate DNA into amino acids in any of six reading frames using the standard genetic code.
Open toolDNA to RNA Transcription Tool
Convert coding or template DNA into an RNA sequence with explicit strand direction.
Open toolReverse Complement Generator
Generate the reverse complement of DNA, including IUPAC ambiguity codes.
Open toolGC Content Calculator
Calculate DNA GC percentage, AT percentage and base counts with clear handling of ambiguous bases.
Open toolDNA Sequence Analyzer
Inspect DNA length, nucleotide counts, GC content, GC skew and approximate molecular size.
Open toolRNA Sequence Analyzer
Measure RNA length, A/U/G/C composition, GC content and ambiguous nucleotide counts.
Open toolCodon Lookup Tool
Look up a DNA or RNA codon to find its amino acid, abbreviation and stop-codon status.
Open toolCodon Table Explorer
Explore all 64 standard-code codons. Search amino acids and switch between DNA and RNA notation.
Open toolORF Finder
Find ATG-start open reading frames on both DNA strands, with coordinates and translated proteins.
Open toolProtein Molecular Weight Calculator
Estimate average and monoisotopic protein mass from a standard one-letter amino acid sequence.
Open toolA simple sequence workflow
Start with a DNA composition check, find candidate regions with the ORF Finder, then translate the sequence. Each tool explains its assumptions and supports copying or downloading results.
Working on a lab report? Use the Flashcard Maker, Citation Generator, Percentage Calculator or Unit Converter.