Convert MOL to Markdown.
Drop a .mol or .sdf chemical structure file and read its molecule as plain Markdown. 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.
An atom block,
not a summary.
A MOL or SDF file stores a molecule as an atom block and a bond block full of coordinates. The converter reads that structure and writes the name, formula and counts as plain Markdown.
Caffeine
-ISIS-
24 25 0 0 0
1.2000 0.5000 0.0000 N
0.1000 1.2000 0.0000 C
# Molecule (MOL)
- Name: Caffeine
- Formula: C8H10N4O2
- Atoms: 24
- Bonds: 25
Everything you
actually need.
Chemical structure files in, clean Markdown out, with no server and no account anywhere.
It never leaves your browser
Your .mol or .sdf is read and parsed on your own 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.
- Formula: C8H10N4O2
- Atoms: 24
- Bonds: 25
Molecule, summarised
You get the molecule name, a derived formula and the atom and bond counts.
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.
What survives
the trip.
Honest about what comes through, and what doesn't. A multi-molecule SDF is summarised as a table, capped at 200 entries, so a large library stays readable.
Kept
4- The molecule name
- A derived formula
- Atom and bond counts
- SDF data fields
Dropped
2- Atom coordinates
- Bond details
MOL questions,
answered.
Everything worth knowing before you drop in a .mol or .sdf file.
Other converters.
Working with more than molecule files? These convert the same way: privately, in your browser.
diff / patch to Markdown
.diff · .patch
Source-code diffs.
systemd to Markdown
.service · .timer · .socket
systemd unit files.
.desktop to Markdown
.desktop
Linux application launchers.
Windows registry to Markdown
.reg
Registry export files.
Apple plist to Markdown
.plist
macOS & iOS property lists.
Terraform to Markdown
.tfvars · .tfstate
Terraform variables & state.
ZIP to Markdown
.zip · .jar · .war
ZIP archives, contents converted.
tar / gzip to Markdown
.tar · .gz · .tgz
tar & gzip archives, contents converted.