Plasmid Map & Sequence Viewer
Render a circular or linear map with restriction sites.
🔒 Nothing you paste is logged or stored
This plasmid map viewer renders a DNA or plasmid sequence as an interactive circular DNA map, a linear sequence viewer, or both, with the base index and complement strand. Toggle any of 15 common restriction enzymes to overlay their cut sites and read the restriction map, then export the figure as SVG, PNG or PDF. It is a plasmid viewer online that never logs or stores your sequence.
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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 Plasmid Viewer tool
- 1Paste a DNA or plasmid sequence into the "DNA sequence" box, or click "Load example (GFP)", and name it under "Construct name".
- 2Pick "Circular + linear", "Circular only" or "Linear only" from the View dropdown, and use the "Show index" and "Show complement" checkboxes to control what the map labels.
- 3Click the enzyme chips under "Restriction enzymes" to overlay cut sites: EcoRI, BamHI and HindIII start selected, and 15 common enzymes are available.
- 4With a circular view showing, save the map with the SVG, PNG or PDF buttons (untick "Mark" to drop the watermark), or press Share to copy a link that reopens the same view.
Frequently asked questions
Can it show restriction sites?
Yes. Toggle any of the 15 enzyme chips under "Restriction enzymes" (EcoRI, BamHI and HindIII start selected) and their sites are marked on the circular and linear map as you click. This page marks positions only: for predicted fragment sizes on a simulated agarose gel use the Virtual Gel tool, and for a scan across the full curated enzyme set on an editable construct open SeqStudio.
Is my data stored?
No. Your sequence is used only to draw the map and find the cut sites, and is never logged or stored.
More
Guides
References
Common restriction enzymes: recognition sites, cut positions, NEB buffer activity, star activity and an interactive double-digest buffer finder.
Selection markers, mechanisms and working concentrations for cloning.
Reference table of common cloning and protein expression vectors with backbone size, origin of replication, copy number, selection marker, promoter and fusion tags.
Related tools
Paste a GenBank record and see an annotated circular or linear map with a feature table.
View an .ab1 / .abi Sanger chromatogram, read the base calls and export the trace.
Align a Sanger read to a reference and get a pass / needs-review verification report.