Convert TopoJSON to Markdown.
Drop a TopoJSON file and get a tidy Markdown outline of its named objects. It runs entirely in your browser, so your file never leaves your device.
Drag & drop your files
or
Optimize for AI & RAG
Extra cleanup for LLM ingestion: strip HTML, fix smart quotes, tidy Unicode and spacing.
Add YAML front matter
Prepend a metadata block (title, source, date, word & token counts) for knowledge bases and RAG.
Add table of contents
Build a linked index from the headings. Handy for long documents.
Export RAG chunks (.json)
Split the result into retrieval-ready chunks. Download per file from the result panel.
Most converters quietly upload your documents to a server. This one physically can't.
Topology in,
an outline out.
TopoJSON stores shapes as shared arcs and numeric index lists, which read as noise to a person. The converter turns that into a readable roster of your named objects.
{
"type": "Topology",
"objects": {
"districts": { "type": "GeometryCollection",
"geometries": [ {}, {} ] }
},
"arcs": [ [[0,0],[1,2]] ]
}
# TopoJSON
## districts
- Type: GeometryCollection
- Geometries: 2
Everything you
actually need.
TopoJSON in, a clean object outline out, with no server and no account anywhere.
It never leaves your browser
Your .topojson is read and parsed on your device. Nothing is uploaded to any server, ever.
# Heading
- point one
3 chunks
AI & RAG ready
Optional cleanup, YAML front matter, a table of contents and RAG chunk export.
Works offline
Once the page has loaded you can switch off your connection and it keeps converting.
## districts
- Type: GeometryCollection
- Geometries: 2
Objects, typed and counted
Each named object becomes a heading with its geometry type and how many geometries it holds.
Unicode safe
Accents, symbols and non-Latin scripts come through intact as UTF-8.
Free, and unlimited
No sign-up, no quotas, no watermarks. Convert one file or a thousand; it all runs the same way, on your own device.
An inventory,
not a map.
Honest about what comes through, and what doesn't. You get the list of objects with their types and counts; the geometry itself, the arcs and coordinates, stays behind.
Kept
3- A document heading
- Each named object with its type
- Geometry count per object
Dropped
3- Arcs
- Coordinates
- Geometry properties
TopoJSON questions,
answered.
Everything worth knowing before you drop in a TopoJSON file.
Other converters.
Working with more than TopoJSON? These convert the same way: privately, in your browser.
AsciiDoc to Markdown
.adoc · .asciidoc
AsciiDoc technical writing.
Org-mode to Markdown
.org
Emacs Org-mode documents.
Textile to Markdown
.textile
Textile lightweight markup.
BBCode to Markdown
.bbcode
Forum BBCode markup.
Typst to Markdown
.typ
Typst typesetting source.
man / roff to Markdown
.man · .roff
Unix manual pages.
SVG to Markdown
.svg
Vector graphics with text.
MediaWiki to Markdown
.wiki · .mediawiki
Wikipedia-style wiki markup.