Spectra 
Document conversion for scientific documents.
Install
npm install -g @mathpix/spectra
spectra set-api-key ...
Usage
Sign up at https://accounts.mathpix.com and setup an API to get your OCR API key.
Once you copy the API key you can set it as an environment variable MATHPIX_OCR_API_KEY:
export MATHPIX_OCR_API_KEY=...
Or save it permanently in the spectra config file:
spectra set-api-key ...
# This will save the key in a file at
# ~/.spectra/config on Linux, macOS, or Unix
# C:\Users\USERNAME\.spectra\config on Windows
To digitize PDF's to editable Mathpix Markdown, docx, html or tex.zip:
spectra convert input-file.pdf output-file.mmd
spectra convert input-file.pdf output-file.docx
spectra convert input-file.pdf output-file.tex
spectra convert input-file.pdf output-file.html
You can also compile Markdown files without using Mathpix OCR:
spectra convert input-file.mmd output-file.docx
spectra convert input-file.mmd output-file.tex
spectra convert input-file.mmd output-file.html
spectra convert input-file.mmd output-file.pdf
spectra convert input-file.mmd output-file.pdf --pdf-method html
To view mmd files rendered into html on a local server:
spectra serve ./input-dir
spectra serve ./input-dir/example.mmd
To build a directory of mmd files into a static html site:
spectra build ./input-dir ./output-dir
The cli has built in --help that will show all commands and flags:
$ spectra --help
Usage: spectra command [options] [args]
Document conversion for scientific documents
Options:
-V, --version output the version number
-h, --help display help for command
Commands:
build [options] [source] [destination] build a static html site from a directory of markdown or mathpix markdown
convert [options] <source.ext> <destination.ext> convert files between markdown, mathpix markdown, docx, latex and pdf formats
serve [options] <source> serve markdown or mathpix markdown rendered at html
set-api-key [options] <mathpix_ocr_api_key> save Mathpix OCR API key at ~/.spectra/credentials
help [command] display help for command