diff --git a/hypha.go b/hypha.go
index 4655092..b29b602 100644
--- a/hypha.go
+++ b/hypha.go
@@ -2,7 +2,10 @@ package main
 
 import (
 	"fmt"
+	"io/ioutil"
+	"net/http"
 	"strconv"
+	"strings"
 )
 
 type Hypha struct {
@@ -50,3 +53,28 @@ func (h *Hypha) NewestRevision() string {
 func (h *Hypha) ParentName() string {
 	return h.parentName
 }
+
+func ActionEdit(hyphaName string, w http.ResponseWriter) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	var initContents, initTextMime, initBinaryMime, initTags string
+	hypha, ok := hyphae[hyphaName]
+	if !ok {
+		initContents = "Describe " + hyphaName + "here."
+		initTextMime = "text/markdown"
+	} else {
+		newestRev := hypha.Revisions[hypha.NewestRevision()]
+		contents, err := ioutil.ReadFile(newestRev.TextPath)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			w.Write([]byte("<b>Sorry, something went wrong</b>"))
+			return
+		}
+		initContents = string(contents)
+		initTextMime = newestRev.TextMime
+		initBinaryMime = newestRev.BinaryMime
+		initTags = strings.Join(newestRev.Tags, ",")
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte(EditHyphaPage(hyphaName, initTextMime, initBinaryMime, initContents, initTags)))
+}
diff --git a/main.go b/main.go
index bc62f5f..434bb48 100644
--- a/main.go
+++ b/main.go
@@ -118,8 +118,8 @@ func HandlerHistory(w http.ResponseWriter, r *http.Request) {
 }
 
 func HandlerEdit(w http.ResponseWriter, r *http.Request) {
-	w.WriteHeader(http.StatusNotImplemented)
-	log.Println("Attempt to access an unimplemented thing")
+	vars := mux.Vars(r)
+	ActionEdit(vars["hypha"], w)
 }
 
 func HandlerRewind(w http.ResponseWriter, r *http.Request) {
diff --git a/render.go b/render.go
index 0a13779..d8267d2 100644
--- a/render.go
+++ b/render.go
@@ -24,6 +24,57 @@ func Layout(f map[string]string) string {
 	return fmt.Sprintf(template, f["title"], f["head"], f["header"], f["main"], f["sidebar"], FooterText, f["bodyBottom"])
 }
 
+func EditHyphaPage(name, text_mime, binary_mime, content, tags string) string {
+	template := `
+<div class="naviwrapper">
+	<form class="naviwrapper__edit edit-box">
+		<div class="naviwrapper__buttons">
+			<input type="submit" name="action" value="update"/>
+		</div>
+
+		<div class="edit-box__left">
+			<h4>Edit box</h4>
+			<textarea class="edit-box__text" name="text" cols="80" rows="25">
+%s
+			</textarea>
+
+			<h4>Upload file</h4>
+			<p>If this hypha has a file like that, the text above is meant to be a description of it</p>
+			<input type="file" name="binary"/>
+		</div>
+
+		<div class="edit-box__right">
+			<h4>Text MIME-type</h4>
+			<p>Good types are <code>text/markdown</code> and <code>text/plain</code></p>
+			<input type="text" name="text_mime" value="%s"/>
+
+			<h4>Media MIME-type</h4>
+			<p>For now, only image formats are supported. Choose any, but <code>image/jpeg</code> and <code>image/png</code> are recommended</p>
+			<input type="text" name="binary_mime" value="%s"/>
+
+			<h4>Revision comment</h4>
+			<p>Please make your comment helpful</p>
+			<input type="text" name="comment" value="%s"/>
+
+			<h4>Edit tags</h4>
+			<p>Tags are separated by commas, whitespace is ignored</p>
+			<input type="text" name="comment" value="%s"/>
+		</div>
+	</form>
+</div>
+`
+	args := map[string]string{
+		"title":   fmt.Sprintf(TitleTemplate, "Edit "+name),
+		"head":    DefaultStyles,
+		"header":  `<h1 class="header__edit-title">Edit ` + name + `</h1>`,
+		"main":    fmt.Sprintf(template, content, text_mime, binary_mime, "Update "+name, tags),
+		"sidebar": "",
+		"footer":  FooterText,
+	}
+
+	return Layout(args)
+}
+
 func HyphaPage(hyphae map[string]*Hypha, rev Revision, content string) string {
 	template := `
 <div class="naviwrapper">
diff --git a/w/m/sys/main.css/1.txt b/w/m/sys/main.css/1.txt
index e33571d..2ab4057 100644
--- a/w/m/sys/main.css/1.txt
+++ b/w/m/sys/main.css/1.txt
@@ -1,2 +1,7 @@
 b { color: red; }
 article { border: 1px black solid; }
+.edit-box { display: grid; grid-template-columns: 7fr 5fr; }
+.edit-box .naviwrapper__buttons { grid-column: 1; grid-row: 2 }
+.edit-box__left { grid-column: 1; grid-row: 2 }
+.edit-box__right { grid-column: 2; grid-row: 1 / span 2 }
+