Plasmid Map Viewer
How to draw a plasmid map
- Paste a GenBank or EMBL file: the one from Addgene, SnapGene, Benchling or NCBI all work.
- The circular map appears with every feature as an arrow, and the feature table underneath.
- Choose which restriction sites to show, then download the map as an SVG.
Frequently asked questions
What files can I use?
GenBank (.gb, .gbk) and EMBL files, which is what Addgene, SnapGene, Benchling and NCBI all export. The sequence alone is not enough: the features have to be in the file for there to be anything to draw.
Why are some features missing?
The source feature is left out because it covers the whole plasmid, and anything without a usable location is skipped. Everything the tool drew is listed in the feature table, so you can see what it read.
What do the arrows mean?
Each arrow is one feature, pointing the way it is read. Features that overlap are moved to inner rings so they stay separate, and the colours follow the usual conventions: blue for coding sequences, green for promoters, red for terminators, purple for origins, orange for primer sites.
Why only single cutters by default?
Because those are the sites you can actually clone into. Showing every site on a 5 kb plasmid gives hundreds of labels and tells you nothing.
Can I edit the map afterwards?
Yes. The downloaded SVG is made of real shapes and text, so Inkscape, Illustrator and Figma can open it and you can move labels or change colours for a figure.
Is my sequence uploaded?
No. Everything runs in your browser, so your sequences never leave your device.