Online Sequence Analysis Tools
Discover standard online web servers for DNA, RNA, and protein sequence analysis. Compare sequence similarity with BLAST, align multiple homologs with Clustal Omega and MUSCLE, or translate reading frames directly in your browser.
CodonTable Native Translation & Analysis Suite
Zero server queues and private client-side execution for your daily sequence manipulation tasks:
DNA to Protein Converter
DNA to RNA Converter
RNA to Protein Converter
Codon to Anticodon Converter
Sequence Translator
Reverse Complement
Online Sequence Alignment & Characterization Servers
Established public online services maintained by NCBI, EMBL-EBI, and SIB:
NCBI BLAST
by NCBI / NIH
The gold-standard Basic Local Alignment Search Tool. Finds regions of local sequence similarity across nucleotide and protein databases with BLASTn, BLASTp, BLASTx, and tBLASTn.
NCBI Primer-BLAST
by NCBI / NIH
Automated PCR primer design server integrating Primer3 with whole-genome BLAST specificity checks to avoid non-specific amplification across transcriptomes and genomes.
Clustal Omega
by EMBL-EBI
High-performance multiple sequence alignment (MSA) server by EMBL-EBI utilizing mBed guide trees and profile-profile Hidden Markov Model (HMM) algorithms.
MUSCLE
by Robert C. Edgar / EMBL-EBI
Renowned multiple sequence alignment tool achieving superior benchmark accuracy and rapid execution for large nucleotide and protein datasets.
T-Coffee
by Centre for Genomic Regulation (CRG) / EBI
Consistency-based multiple sequence alignment package combining pairwise global and local alignments, structural templates, and high-accuracy progressive algorithms.
UCSC In-Silico PCR
by UCSC Genome Browser Group
Instant genome-wide electronic PCR simulator mapping primer pairs against reference genomes (Human, Mouse, Rat, etc.) to detect amplicon sizes, introns, and genomic loci.
NCBI ORFfinder
by NCBI / NIH
Interactive open reading frame finder identifying all candidate protein-coding segments in DNA sequences using standard or non-standard genetic codes.
CodonTable Sequence Translator
by CodonTable (In-House)
Instant client-side 6-frame translation tool translating nucleotide sequences to protein sequences across forward and reverse-complement frames with open reading frame visualization.
How to Choose the Right Sequence Analysis Tool
1. Homology Search & Identity
When searching a novel sequence against international archives (nr, refseq, swissprot), BLAST is the undisputed gold standard.
2. Multiple Sequence Alignment
For evolutionary conservation and phylogenetic inference across multiple homologs, choose MUSCLE or Clustal Omega.
3. PCR Primers & Specificity
Design primers with transcript-level specificity via NCBI Primer-BLAST; simulate genomic amplicon products with UCSC In-Silico PCR.
4. Protein Properties & Targeting
Calculate isoelectric points (pI) and stability with ProtParam, predict transmembrane domains with TMHMM, and signal peptides with SignalP.
Frequently Asked Questions (FAQ)
What is the best free online tool for Multiple Sequence Alignment (MSA)?
For most standard protein and nucleotide datasets (<500 sequences), MUSCLE and Clustal Omega are the gold standard choices balancing high alignment accuracy with rapid processing. For complex sequence sets with conserved motifs, T-Coffee provides consistency-based accuracy.
How can I quickly translate DNA/RNA to protein across all reading frames?
You can use CodonTable's built-in Sequence Translator or DNA-to-Protein Converter for instant browser-based translation across all 6 reading frames with custom genetic code tables. For Swiss-Prot linked workflows, ExPASy Translate is also recommended.
Which BLAST algorithm should I choose for sequence homology search?
Use BLASTn to compare a nucleotide query against nucleotide databases; BLASTp for protein-protein queries; BLASTx to translate a nucleotide sequence in 6 frames against protein databases; and tBLASTn to search a protein query against translated nucleotide databases.