GenBank Map Viewer with Feature Table
Paste a GenBank record and see an annotated circular or linear map with a feature table.
Paste a GenBank flat file to view a GenBank file online: this GenBank viewer parses the LOCUS line, DEFINITION, FEATURES table and ORIGIN sequence, then draws an annotated plasmid map, circular or linear, with features color-coded by type. A GenBank feature viewer table lists every label, type, location, strand and length, the parsed sequence is shown with a copy button, and the map exports as SVG, PNG or PDF.
▸Display: circular + linear · index
Design, edit, and verify complete constructsSeqStudio combines sequence editing and annotation, plasmid maps, primer/cloning/CRISPR design, Sanger verification, and GenBank/SnapGene files in one workspace.
How to use the GenBank Viewer tool
- 1Paste a GenBank flat file (LOCUS through FEATURES, ORIGIN and the closing //) into the "GenBank record" box, or click "Load example".
- 2Choose "Circular + linear", "Circular only" or "Linear only" from the View dropdown and toggle "Show index"; the dropdown opens on whatever topology the LOCUS line declares, so a linear record is not drawn as a ring, and a note under the map says which topology was read.
- 3Scan the Features table for each feature's label, type, location, strand and length, and press "Jump to map" to scroll back to the map.
- 4Copy the parsed ORIGIN sequence with the Copy button, or save the map from the Figure button as SVG, PNG or PDF.
Frequently asked questions
What does the GenBank viewer parse?
The LOCUS line (for length and topology), the DEFINITION, the FEATURES table — including locations like 123..456, complement(...) and join(...), with /label, /gene and /product qualifiers — and the ORIGIN sequence. Features become annotations on the map and rows in the feature table.
Can I see a circular plasmid map?
Yes, but not automatically: the view opens on the topology the LOCUS line declares, so a record marked linear starts as a linear map. Choose "Circular only" or "Circular + linear" in the View dropdown to see it as a ring with its features placed around it — worth doing whenever a plasmid has been written out as linear, which plenty of tools do. A note under the map says which topology was read. One caveat: this page draws features from their parsed min/max coordinates, so a feature written as an origin-spanning join(...) is collapsed into a single span rather than wrapped. Open SeqStudio if you need true origin-spanning handling.
Can I export the map or copy the sequence?
Yes. The map exports from the Figure button as SVG, PNG or PDF (untick "Watermark" in that menu to drop the seqbench.com credit), and the Copy button above the sequence panel copies the parsed ORIGIN sequence. This page is a viewer, so there is no editing or GenBank export here; open SeqStudio, the full editor, if you need to change the record and write a GenBank or SnapGene file back out.
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