diff --git a/elisp/csvivify.el b/elisp/csvivify.el
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+;;; csvivify.el --- Turn org or markdown tables into csv in-place -*- lexical-binding: t -*-
+
+;;; Commentary:
+
+;; For most use-cases, this is unnecessary, as org tables can already convert
+;; to and from markdown and CSV, but it was a fun exercise to write.
+
+;;; Code:
+
+(defun csvivify ()
+  "Make org or markdown table into csv in-place."
+  (interactive)
+  (when (region-active-p)
+    (let* ((from (region-beginning))
+	   (to (region-end))
+	   (remainder (- (point-max) to)))
+      (flush-lines "\|[-\\+]+\|" from to)
+      (flush-lines "^|[\s|:-]+|$" from to)
+      (save-excursion
+	(while (re-search-forward "[\s]+|[\s]+" (- (point-max) remainder) t)
+	  (replace-match ",")))
+      (save-excursion
+	(while (re-search-forward "^|\s+\\|\s+|$" (- (point-max) remainder) t)
+	  (replace-match ""))))))
+
+;;; csvivify.el ends here