diff --git a/copyparty/web/md.css b/copyparty/web/md.css
index 58f5543c..591d2ec8 100644
--- a/copyparty/web/md.css
+++ b/copyparty/web/md.css
@@ -372,4 +372,13 @@ blink {
 	#mn, #mh {
 		display: none;
 	}
-}
\ No newline at end of file
+}
+
+/*
+*[data-ln]:before {
+	content: attr(data-ln);
+	font-size: .8em;
+	margin: 0 .4em;
+	color: #f0c;
+}
+*/
\ No newline at end of file
diff --git a/copyparty/web/md.js b/copyparty/web/md.js
index c3577c94..56e894dd 100644
--- a/copyparty/web/md.js
+++ b/copyparty/web/md.js
@@ -126,8 +126,14 @@ function init_toc() {
             };
         }
         else if (is_precode) {
-            elm.innerHTML = elm.innerHTML.replace(
-                /\r?\n<\/code>$/i, '</code>').split(/\r?\n/g).join('</code>\n<code>');
+            // not actually toc-related (sorry),
+            // split <pre><code /></pre> into one <code> per line
+            var nline = parseInt(elm.getAttribute('data-ln')) + 1;
+            var lines = elm.innerHTML.replace(/\r?\n<\/code>$/i, '</code>').split(/\r?\n/g);
+            for (var b = 0; b < lines.length - 1; b++)
+                lines[b] += '</code>\n<code data-ln="' + (nline + b) + '">';
+
+            elm.innerHTML = lines.join('');
         }
 
         if (!is_header && anchor)
@@ -161,7 +167,7 @@ function init_toc() {
             return;
 
         var ptop = window.pageYOffset || document.documentElement.scrollTop;
-        var hit = -1;
+        var hit = anchors.length - 1;
         for (var a = 0; a < anchors.length; a++) {
             if (anchors[a].y >= ptop - 8) {  //???
                 hit = a;
diff --git a/scripts/deps-docker/Dockerfile b/scripts/deps-docker/Dockerfile
index b7c64ca6..571156f7 100644
--- a/scripts/deps-docker/Dockerfile
+++ b/scripts/deps-docker/Dockerfile
@@ -68,7 +68,9 @@ RUN     cd ogvjs-$ver_ogvjs \
 
 # build marked
 COPY    marked.patch /z/
+COPY    marked-ln.patch /z/
 RUN     cd marked-$ver_marked \
+        && patch -p1 < /z/marked-ln.patch \
         && patch -p1 < /z/marked.patch \
         && npm run build \
         && cp -pv marked.min.js /z/dist/marked.js \
@@ -152,3 +154,7 @@ RUN     cd /z/dist \
 
 
 # f=../../copyparty/web/deps/marked.js.gz; (cd ~ed/src/ && diff -NarU1 marked-1.0.0-orig/ marked-1.0.0-edit/) >marked.patch; make && printf '%d ' $(wc -c <$f) $(gzip -d <$f | wc -c); echo
+
+
+# d=/home/ed/dev/copyparty/scripts/deps-docker/; scp Dockerfile marked-ln.patch root@$bip:$d && ssh root@$bip "cd $d && make" && ssh root@$bip 'tar -cC /home/ed/dev/copyparty/copyparty/web deps' | (cd ../../copyparty/web/; cat > the.tgz; tar -xvf the.tgz)
+# gzip -dkf ../dev/copyparty/copyparty/web/deps/deps/marked.full.js.gz && diff -NarU2 ../dev/copyparty/copyparty/web/deps/{,deps/}marked.full.js
diff --git a/scripts/deps-docker/marked-ln.patch b/scripts/deps-docker/marked-ln.patch
new file mode 100644
index 00000000..26725f08
--- /dev/null
+++ b/scripts/deps-docker/marked-ln.patch
@@ -0,0 +1,300 @@
+diff --git a/src/Lexer.js b/src/Lexer.js
+adds linetracking to marked.js v1.0.0;
+add data-ln="%d" to most tags, %d is the source markdown line
+--- a/src/Lexer.js
++++ b/src/Lexer.js
+@@ -49,4 +49,5 @@ function mangle(text) {
+ module.exports = class Lexer {
+   constructor(options) {
++    this.ln = 1;  // like most editors, start couting from 1
+     this.tokens = [];
+     this.tokens.links = Object.create(null);
+@@ -108,4 +109,15 @@ module.exports = class Lexer {
+   }
+ 
++  set_ln(token, ln = this.ln) {
++    // assigns ln (the current line numer) to the token,
++    // then bump this.ln by the number of newlines in the contents
++    //
++    // if ln is set, also assigns the line counter to a new value
++    // (usually a backup value from before a call into a subparser
++    //  which bumped the linecounter by a subset of the newlines)
++    token.ln = ln;
++    this.ln = ln + (token.raw.match(/\n/g) || []).length;
++  }
++
+   /**
+    * Lexing
+@@ -113,10 +125,15 @@ module.exports = class Lexer {
+   blockTokens(src, tokens = [], top = true) {
+     src = src.replace(/^ +$/gm, '');
+-    let token, i, l;
++    let token, i, l, ln;
+ 
+     while (src) {
++      // this.ln will be bumped by recursive calls into this func;
++      // reset the count and rely on the outermost token's raw only
++      ln = this.ln;
++      
+       // newline
+       if (token = this.tokenizer.space(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token); // is \n if not type
+         if (token.type) {
+           tokens.push(token);
+@@ -128,4 +145,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.code(src, tokens)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -135,4 +153,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.fences(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -142,4 +161,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.heading(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -149,4 +169,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.nptable(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -156,4 +177,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.hr(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -164,4 +186,7 @@ module.exports = class Lexer {
+         src = src.substring(token.raw.length);
+         token.tokens = this.blockTokens(token.text, [], top);
++        // recursive call to blockTokens probably bumped this.ln,
++        // token.raw is more reliable so reset this.ln and use that
++        this.set_ln(token, ln);
+         tokens.push(token);
+         continue;
+@@ -174,5 +199,9 @@ module.exports = class Lexer {
+         for (i = 0; i < l; i++) {
+           token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
++          // list entries don't bump the linecounter, so let's
++          this.ln++;
+         }
++        // then reset like blockquote
++        this.set_ln(token, ln);
+         tokens.push(token);
+         continue;
+@@ -182,4 +211,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.html(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -189,4 +219,5 @@ module.exports = class Lexer {
+       if (top && (token = this.tokenizer.def(src))) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         if (!this.tokens.links[token.tag]) {
+           this.tokens.links[token.tag] = {
+@@ -201,4 +232,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.table(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -208,4 +240,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.lheading(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -215,4 +248,5 @@ module.exports = class Lexer {
+       if (top && (token = this.tokenizer.paragraph(src))) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -222,4 +256,5 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.text(src)) {
+         src = src.substring(token.raw.length);
++        this.set_ln(token);
+         tokens.push(token);
+         continue;
+@@ -251,4 +286,7 @@ module.exports = class Lexer {
+     for (i = 0; i < l; i++) {
+       token = tokens[i];
++      // this.ln is at EOF when inline() is invoked;
++      // all this affects <br> tags only so no biggie if it breaks
++      this.ln = token.ln || this.ln;
+       switch (token.type) {
+         case 'paragraph':
+@@ -374,4 +412,6 @@ module.exports = class Lexer {
+       if (token = this.tokenizer.br(src)) {
+         src = src.substring(token.raw.length);
++        // no need to reset (no more blockTokens anyways)
++        token.ln = this.ln++;
+         tokens.push(token);
+         continue;
+diff --git a/src/Parser.js b/src/Parser.js
+index bad3ac7..882da47 100644
+--- a/src/Parser.js
++++ b/src/Parser.js
+@@ -18,4 +18,5 @@ module.exports = class Parser {
+     this.textRenderer = new TextRenderer();
+     this.slugger = new Slugger();
++    this.ln = 0; // error indicator; should always be set >=1 from tokens
+   }
+ 
+@@ -55,4 +56,9 @@ module.exports = class Parser {
+     for (i = 0; i < l; i++) {
+       token = tokens[i];
++      // take line-numbers from tokens whenever possible
++      // and update the renderer's html attribute with the new value
++      this.ln = token.ln || this.ln;
++      this.renderer.tag_ln(this.ln);
++
+       switch (token.type) {
+         case 'space': {
+@@ -105,7 +111,10 @@ module.exports = class Parser {
+             }
+ 
+-            body += this.renderer.tablerow(cell);
++            // the +2 is to skip the table header
++            body += this.renderer.tag_ln(token.ln + j + 2).tablerow(cell);
+           }
+-          out += this.renderer.table(header, body);
++          // the html attribute is now at the end of the table,
++          // reset it before writing the <table> tag now
++          out += this.renderer.tag_ln(token.ln).table(header, body);
+           continue;
+         }
+@@ -148,8 +157,12 @@ module.exports = class Parser {
+ 
+             itemBody += this.parse(item.tokens, loose);
+-            body += this.renderer.listitem(itemBody, task, checked);
++            // similar to tables, writing contents before the <ul> tag
++            // so update the tag attribute as we go
++            // (assuming all list entries got tagged with a source-line, probably safe w)
++            body += this.renderer.tag_ln(item.tokens[0].ln).listitem(itemBody, task, checked);
+           }
+ 
+-          out += this.renderer.list(body, ordered, start);
++          // then reset to the <ul>'s correct line number and write it
++          out += this.renderer.tag_ln(token.ln).list(body, ordered, start);
+           continue;
+         }
+@@ -160,5 +173,6 @@ module.exports = class Parser {
+         }
+         case 'paragraph': {
+-          out += this.renderer.paragraph(this.parseInline(token.tokens));
++          let t = this.parseInline(token.tokens);
++          out += this.renderer.tag_ln(token.ln).paragraph(t);
+           continue;
+         }
+@@ -199,4 +213,6 @@ module.exports = class Parser {
+     for (i = 0; i < l; i++) {
+       token = tokens[i];
++      // another thing that only affects <br/> and other inlines
++      this.ln = token.ln || this.ln;
+       switch (token.type) {
+         case 'escape': {
+@@ -229,5 +245,7 @@ module.exports = class Parser {
+         }
+         case 'br': {
+-          out += renderer.br();
++          // update the html attribute before writing each <br/>,
++          // don't care about the others
++          out += renderer.tag_ln(this.ln).br();
+           break;
+         }
+diff --git a/src/Renderer.js b/src/Renderer.js
+index a86732c..7ed907b 100644
+--- a/src/Renderer.js
++++ b/src/Renderer.js
+@@ -11,6 +11,12 @@ module.exports = class Renderer {
+   constructor(options) {
+     this.options = options || defaults;
++    this.ln = "";
+   }
+ 
++  tag_ln(n) {
++    this.ln = ' data-ln="' + n + '"';
++    return this;
++  };
++  
+   code(code, infostring, escaped) {
+     const lang = (infostring || '').match(/\S*/)[0];
+@@ -24,10 +30,10 @@ module.exports = class Renderer {
+ 
+     if (!lang) {
+-      return '<pre><code>'
++      return '<pre' + this.ln + '><code>'
+         + (escaped ? code : escape(code, true))
+         + '</code></pre>';
+     }
+ 
+-    return '<pre><code class="'
++    return '<pre' + this.ln + '><code class="'
+       + this.options.langPrefix
+       + escape(lang, true)
+@@ -38,5 +44,5 @@ module.exports = class Renderer {
+ 
+   blockquote(quote) {
+-    return '<blockquote>\n' + quote + '</blockquote>\n';
++    return '<blockquote' + this.ln + '>\n' + quote + '</blockquote>\n';
+   }
+ 
+@@ -49,4 +55,5 @@ module.exports = class Renderer {
+       return '<h'
+         + level
++        + this.ln
+         + ' id="'
+         + this.options.headerPrefix
+@@ -59,5 +66,5 @@ module.exports = class Renderer {
+     }
+     // ignore IDs
+-    return '<h' + level + '>' + text + '</h' + level + '>\n';
++    return '<h' + level + this.ln + '>' + text + '</h' + level + '>\n';
+   }
+ 
+@@ -73,5 +80,5 @@ module.exports = class Renderer {
+ 
+   listitem(text) {
+-    return '<li>' + text + '</li>\n';
++    return '<li' + this.ln + '>' + text + '</li>\n';
+   }
+ 
+@@ -85,5 +92,5 @@ module.exports = class Renderer {
+ 
+   paragraph(text) {
+-    return '<p>' + text + '</p>\n';
++    return '<p' + this.ln + '>' + text + '</p>\n';
+   }
+ 
+@@ -100,5 +107,5 @@ module.exports = class Renderer {
+ 
+   tablerow(content) {
+-    return '<tr>\n' + content + '</tr>\n';
++    return '<tr' + this.ln + '>\n' + content + '</tr>\n';
+   }
+ 
+@@ -125,5 +132,5 @@ module.exports = class Renderer {
+ 
+   br() {
+-    return this.options.xhtml ? '<br/>' : '<br>';
++    return this.options.xhtml ? '<br' + this.ln + '/>' : '<br' + this.ln + '>';
+   }
+ 
+@@ -151,5 +158,5 @@ module.exports = class Renderer {
+     }
+ 
+-    let out = '<img src="' + href + '" alt="' + text + '"';
++    let out = '<img' + this.ln + ' src="' + href + '" alt="' + text + '"';
+     if (title) {
+       out += ' title="' + title + '"';
diff --git a/srv/test.md b/srv/test.md
index 3611220a..24ae4618 100644
--- a/srv/test.md
+++ b/srv/test.md
@@ -99,6 +99,7 @@ a newline toplevel
 ## ep2
 
 
+
 #######################################################################
 
 
@@ -142,7 +143,18 @@ https://github.com/markdown-it/markdown-it
 
 almost-all-pass:
 
+https://github.com/Ionaru/easy-markdown-editor
+  https://easymde.tk/
+  simplemde fork (the most active)
+
+https://github.com/Inscryb/inscryb-markdown-editor
+  simplemde fork
+
+other simplemde forks:
+  pulkitmittal
+
 https://simplemde.com/
+  (dead)
 
 https://github.com/nhn/tui.editor
   https://nhn.github.io/tui.editor/latest/tutorial-example01-editor-basic
@@ -153,3 +165,9 @@ https://github.com/nhn/tui.editor
 unrelated neat stuff:
   https://github.com/gnab/remark
 
+
+
+```sh
+awk '/./ {printf "%s %d\n", $0, NR; next} 1' <test.md >ln.md
+gawk '{print gensub(/([a-zA-Z\.])/,NR" \\1","1")}' <test.md >ln.md
+```