GenBank Map Viewer with Feature Table
Paste a GenBank record and see an annotated circular or linear map with a feature table.
🌐 Nothing you paste is logged or stored — every tool is also callable via REST & MCP, and in bulk from the batch tools
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.
Working on a whole construct rather than a quick look? Open SeqStudio — the full editor, with live feature annotation, plasmid maps, restriction and primer panels, undo/redo, multi-document tabs and GenBank / SnapGene import and export.
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"; a record whose header says circular gets a "Record marked as circular." note under the map.
- 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 with the SVG, PNG or PDF buttons.
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. Choose "Circular only" or "Circular + linear" in the View dropdown to see the record as a ring with its features placed around it, and when the record says circular a "Record marked as circular." note appears under the map. 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 as SVG, PNG or PDF (untick "Mark" to drop the seqbench.com watermark), 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.
Is my data stored?
No. The record you paste is used only to build the map and feature table, and is never logged or stored.
More
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