Convert Crystallography to Markdown.
Drop a .cif crystal structure file and get its full record as Markdown, kept exactly as written. 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.
Structure data,
easy to share.
A CIF holds a crystal structure as data blocks and underscore-named values that many readers cannot open. Converting wraps the whole record in a Markdown code block, so it reads cleanly in any notebook or document while staying character for character the same.
data_crystal
_cell_length_a 5.4307
_cell_length_b 5.4307
_symmetry_space_group_name_H-M 'F d -3 m'
loop_
_atom_site_label
Si1
```text
data_crystal
_cell_length_a 5.4307
_cell_length_b 5.4307
_symmetry_space_group_name_H-M 'F d -3 m'
loop_
_atom_site_label
Si1
```
Everything you
actually need.
Crystallographic files in, readable Markdown out, with no server and no account anywhere.
It never leaves your browser
Your .cif is read 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.
```text
data_crystal
_cell_length_a 5.4307
```
Structure, preserved
The whole crystallographic record is kept verbatim inside one fenced code block.
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.
Nothing is
lost.
This conversion is lossless: the file content is wrapped in a code block and otherwise left alone. These are the same notes the Formats list shows for CIF, so the page never drifts from what the converter really does.
Kept
2- The full file content
- Wrapped in a fenced code block
Preserved
2- Every data block and value
- Exact characters and order
_cell_length_a 5.4307
_cell_length_b 5.4307
_symmetry_space_group_name_H-M 'F d -3 m'
_atom_site_label Si1
```text
... full record, verbatim ...
```
CIF questions,
answered.
Everything worth knowing before you drop in a crystal structure file.
Other converters.
Working with more than crystal structures? These convert the same way: privately, in your browser.
Email to Markdown
.eml
Single email messages.
Mbox to Markdown
.mbox
Mailbox archives.
Saved web page to Markdown
.mht · .mhtml
MHTML single-file pages.
vCard to Markdown
.vcf
Contact cards.
iCalendar to Markdown
.ics
Calendar events & invites.
SubRip to Markdown
.srt
The most common subtitles.
WebVTT to Markdown
.vtt
Web video captions.
SSA / ASS to Markdown
.ass · .ssa
Advanced styled subtitles.