diff --git a/src/libvterm/bin/unterm.c b/src/libvterm/bin/unterm.c
new file mode 100644
index 0000000..acaf2d2
--- /dev/null
+++ b/src/libvterm/bin/unterm.c
@@ -0,0 +1,287 @@
+#include <stdio.h>
+#include <string.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+
+#include "vterm.h"
+
+#define DEFINE_INLINES
+#include "../src/utf8.h" /* fill_utf8 */
+
+#define streq(a,b) (!strcmp(a,b))
+
+static VTerm *vt;
+static VTermScreen *vts;
+
+static int cols;
+static int rows;
+
+static enum {
+  FORMAT_PLAIN,
+  FORMAT_SGR
+} format = FORMAT_PLAIN;
+
+static int col2index(VTermColor target)
+{
+  int index;
+
+  for(index = 0; index < 256; index++) {
+    VTermColor col;
+    vterm_state_get_palette_color(NULL, index, &col);
+    if(col.red == target.red && col.green == target.green && col.blue == target.blue)
+      return index;
+  }
+  return -1;
+}
+
+static void dump_cell(const VTermScreenCell *cell, const VTermScreenCell *prevcell)
+{
+  switch(format) {
+    case FORMAT_PLAIN:
+      break;
+    case FORMAT_SGR:
+      {
+        /* If all 7 attributes change, that means 7 SGRs max */
+        /* Each colour could consume up to 3 */
+        int sgr[7 + 2*3]; int sgri = 0;
+
+        if(!prevcell->attrs.bold && cell->attrs.bold)
+          sgr[sgri++] = 1;
+        if(prevcell->attrs.bold && !cell->attrs.bold)
+          sgr[sgri++] = 22;
+
+        if(!prevcell->attrs.underline && cell->attrs.underline)
+          sgr[sgri++] = 4;
+        if(prevcell->attrs.underline && !cell->attrs.underline)
+          sgr[sgri++] = 24;
+
+        if(!prevcell->attrs.italic && cell->attrs.italic)
+          sgr[sgri++] = 3;
+        if(prevcell->attrs.italic && !cell->attrs.italic)
+          sgr[sgri++] = 23;
+
+        if(!prevcell->attrs.blink && cell->attrs.blink)
+          sgr[sgri++] = 5;
+        if(prevcell->attrs.blink && !cell->attrs.blink)
+          sgr[sgri++] = 25;
+
+        if(!prevcell->attrs.reverse && cell->attrs.reverse)
+          sgr[sgri++] = 7;
+        if(prevcell->attrs.reverse && !cell->attrs.reverse)
+          sgr[sgri++] = 27;
+
+        if(!prevcell->attrs.strike && cell->attrs.strike)
+          sgr[sgri++] = 9;
+        if(prevcell->attrs.strike && !cell->attrs.strike)
+          sgr[sgri++] = 29;
+
+        if(!prevcell->attrs.font && cell->attrs.font)
+          sgr[sgri++] = 10 + cell->attrs.font;
+        if(prevcell->attrs.font && !cell->attrs.font)
+          sgr[sgri++] = 10;
+
+        if(prevcell->fg.red   != cell->fg.red   ||
+            prevcell->fg.green != cell->fg.green ||
+            prevcell->fg.blue  != cell->fg.blue) {
+          int index = col2index(cell->fg);
+          if(index == -1)
+            sgr[sgri++] = 39;
+          else if(index < 8)
+            sgr[sgri++] = 30 + index;
+          else if(index < 16)
+            sgr[sgri++] = 90 + (index - 8);
+          else {
+            sgr[sgri++] = 38;
+            sgr[sgri++] = 5 | (1<<31);
+            sgr[sgri++] = index | (1<<31);
+          }
+        }
+
+        if(prevcell->bg.red   != cell->bg.red   ||
+            prevcell->bg.green != cell->bg.green ||
+            prevcell->bg.blue  != cell->bg.blue) {
+          int index = col2index(cell->bg);
+          if(index == -1)
+            sgr[sgri++] = 49;
+          else if(index < 8)
+            sgr[sgri++] = 40 + index;
+          else if(index < 16)
+            sgr[sgri++] = 100 + (index - 8);
+          else {
+            sgr[sgri++] = 48;
+            sgr[sgri++] = 5 | (1<<31);
+            sgr[sgri++] = index | (1<<31);
+          }
+        }
+
+        if(!sgri)
+          break;
+
+        printf("\x1b[");
+	{
+	  int i;
+	  for(i = 0; i < sgri; i++)
+	    printf(!i               ? "%d" :
+		sgr[i] & (1<<31) ? ":%d" :
+		";%d",
+		sgr[i] & ~(1<<31));
+	}
+        printf("m");
+      }
+      break;
+  }
+
+  {
+    int i;
+    for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && cell->chars[i]; i++) {
+      char bytes[6];
+      bytes[fill_utf8(cell->chars[i], bytes)] = 0;
+      printf("%s", bytes);
+    }
+  }
+}
+
+static void dump_eol(const VTermScreenCell *prevcell)
+{
+  switch(format) {
+    case FORMAT_PLAIN:
+      break;
+    case FORMAT_SGR:
+      if(prevcell->attrs.bold || prevcell->attrs.underline || prevcell->attrs.italic ||
+         prevcell->attrs.blink || prevcell->attrs.reverse || prevcell->attrs.strike ||
+         prevcell->attrs.font)
+        printf("\x1b[m");
+      break;
+  }
+
+  printf("\n");
+}
+
+void dump_row(int row)
+{
+  VTermPos pos;
+  VTermScreenCell prevcell;
+  pos.row = row;
+  pos.col = 0;
+  memset(&prevcell, 0, sizeof(prevcell));
+  vterm_state_get_default_colors(vterm_obtain_state(vt), &prevcell.fg, &prevcell.bg);
+
+  while(pos.col < cols) {
+    VTermScreenCell cell;
+    vterm_screen_get_cell(vts, pos, &cell);
+
+    dump_cell(&cell, &prevcell);
+
+    pos.col += cell.width;
+    prevcell = cell;
+  }
+
+  dump_eol(&prevcell);
+}
+
+static int screen_sb_pushline(int cols, const VTermScreenCell *cells, void *user)
+{
+  VTermScreenCell prevcell;
+  int col;
+
+  memset(&prevcell, 0, sizeof(prevcell));
+  vterm_state_get_default_colors(vterm_obtain_state(vt), &prevcell.fg, &prevcell.bg);
+
+  for(col = 0; col < cols; col++) {
+    dump_cell(cells + col, &prevcell);
+    prevcell = cells[col];
+  }
+
+  dump_eol(&prevcell);
+
+  return 1;
+}
+
+static int screen_resize(int new_rows, int new_cols, void *user)
+{
+  rows = new_rows;
+  cols = new_cols;
+  return 1;
+}
+
+static VTermScreenCallbacks cb_screen = {
+  NULL, /* damage */
+  NULL, /* moverect */
+  NULL, /* movecursor */
+  NULL, /* settermprop */
+  NULL, /* bell */
+  &screen_resize, /* resize */
+  &screen_sb_pushline, /* sb_pushline */
+  NULL, /* popline */
+};
+
+int main(int argc, char *argv[])
+{
+  int opt;
+  const char *file;
+  int fd;
+  int len;
+  char buffer[1024];
+  int row;
+
+  rows = 25;
+  cols = 80;
+
+  while((opt = getopt(argc, argv, "f:l:c:")) != -1) {
+    switch(opt) {
+      case 'f':
+        if(streq(optarg, "plain"))
+          format = FORMAT_PLAIN;
+        else if(streq(optarg, "sgr"))
+          format = FORMAT_SGR;
+        else {
+          fprintf(stderr, "Unrecognised format '%s'\n", optarg);
+          exit(1);
+        }
+        break;
+
+      case 'l':
+        rows = atoi(optarg);
+        if(!rows)
+          rows = 25;
+        break;
+
+      case 'c':
+        cols = atoi(optarg);
+        if(!cols)
+          cols = 80;
+        break;
+    }
+  }
+
+  file = argv[optind++];
+  fd = open(file, O_RDONLY);
+  if(fd == -1) {
+    fprintf(stderr, "Cannot open %s - %s\n", file, strerror(errno));
+    exit(1);
+  }
+
+  vt = vterm_new(rows, cols);
+  vterm_set_utf8(vt, true);
+
+  vts = vterm_obtain_screen(vt);
+  vterm_screen_set_callbacks(vts, &cb_screen, NULL);
+
+  vterm_screen_reset(vts, 1);
+
+  while((len = read(fd, buffer, sizeof(buffer))) > 0) {
+    vterm_input_write(vt, buffer, len);
+  }
+
+  for(row = 0; row < rows; row++) {
+    dump_row(row);
+  }
+
+  close(fd);
+
+  vterm_free(vt);
+  return 0;
+}