Free to use · Open source · No account

Plasmid maps,
drawn properly.

A circular and linear map editor that runs entirely in your browser. Import GenBank, annotate across tracks, and export vector figures that hold up in print.

Open the editor Browse examples
Import
GenBank · FASTA · SnapGene .dna · JSON · NCBI · AddGene
Export
SVG · PNG · PDF · GenBank · JSON
Storage
Your browser. Sequences are never sent anywhere.
ExamplepUC19Circular
Free to use
No trial, no paid tier
No account
Nothing to sign up for
Works offline
No install required
MIT licensed
Commercial use fine

§ 01

Capabilities

Three static files: one page, one script, one stylesheet. No build step, no dependencies, and every operation below runs on your own machine.

01

Circular & linear views

Switch layout without losing annotations. Both views are fully interactive and both export.

02

Multi-track rings

Distribute features across inner and outer tracks, each with independent styling and label rules.

03

GenBank, FASTA, SnapGene

Read .gb, .gbk, .fa, .fasta and SnapGene .dna files, features and all.

04

NCBI & AddGene fetch

Pull a construct straight in by accession number or AddGene plasmid ID.

05

Publication-grade export

Vector SVG and PDF, or PNG at whatever resolution the journal asks for.

06

GC content track

Sliding-window GC% plotted inside the backbone, with an adjustable window size.

07

Restriction analysis

100 built-in Type II and Type IIS enzymes, overhang visualisation, filtering by cut count.

08

Editing in place

Click a feature to change its name, colour, coordinates, label placement and border. No modal maze.

09

Offline and shareable

Keeps working with no connection, no install needed. Optionally add it to your dock, or hand someone the whole map as a compressed URL.

§ 02

Examples

Six maps drawn in the editor and exported as SVG, exactly as they came out. Open any of them to take the file apart.

pUC19 plasmid map

pUC19

2,686 bp

The classic high-copy cloning vector: lacZα, ampicillin resistance and the polylinker.

Circular4 featuresCloning
Open in editor
HBV genome map

HBV genome

3,215 bp

Hepatitis B, with its overlapping reading frames pushed out onto separate tracks.

Circular5 featuresMulti-track
Open in editor
pET-28a(+) expression vector map

pET-28a(+)

5,369 bp

T7 expression vector with kanamycin resistance, lac operator and marked cut sites.

Circular8 features4 markers
Open in editor
Linear construct map

Linear construct

1,000 bp

The linear view: directional features, restriction sites and a scaled tick ruler.

Linear5 features4 markers
Open in editor
pDONR 221 Gateway donor vector map

pDONR™221

4,761 bp

Gateway donor vector: attP sites on an inner ring, primer sites and dual selection.

Circular11 featuresMulti-track
Open in editor
pAAV-AC-GFP transfer vector map

pAAV-AC-GFP

5,725 bp

AAV transfer vector with flanking ITRs, a CMV-driven GFP reporter and cloning sites.

Circular11 features6 markers
Open in editor

§ 03

Sequence to figure

Three steps, no project setup and nothing to configure before you start.

01

Bring in a sequence

Paste raw sequence, drop in a GenBank or SnapGene file, fetch by accession, or start from an empty backbone.

← GenBank, FASTA, .dna, JSON
02

Annotate and style

Place features and markers across tracks, then set colours, arrowheads, label positions and tick marks until it reads clearly.

↻ 50 levels of undo
03

Export or hand off

Take out vector SVG or PDF for the manuscript, PNG for slides, GenBank for the next tool, or just send a link.

→ SVG, PDF, PNG, GenBank

Open the editor and start with a sequence.

Nothing to install and nothing to sign up for. The work stays in this browser until you export it.

Open the editor