Gaster Translator

Gaster's language is Wingdings. In Undertale, the hidden character W.D. Gaster speaks in text rendered with the Wingdings font, so players who reach him see a wall of symbols instead of words — and the game never displays the plain-English version on screen. That is exactly why a Gaster translator is needed: it maps each symbol back to the letter it stands for.

Gaster's in-game lines are all caps, and they carry no dialogue asterisk — the small marker that appears next to every other line of dialogue in the game. Both details are easy to miss and both are correct in his text.

If you came for the famous entry, that is Entry Number 17, decoded line by line below. For a general-purpose Gaster language translator that works in both directions, the box above is all you need.

Entry Number 17 is the longest piece of Gaster's dialogue in Undertale and the reason most people search for a Gaster translator in the first place. It appears in a hidden room, it is rendered entirely in Wingdings, and the game never translates it for you. Below is the text in the order it appears on screen.

Every symbol in Gaster's dialogue, in one table — the key it stands for, the character you can copy, its Unicode code point, and whether the two mapping conventions give you the same glyph. Use the copy buttons to build a word by hand, or grab a whole phrase from the converter above.

Gaster's in-game dialogue is rendered in all caps, so the chart below is what his text looks like with nothing else added.

Gaster's text uses Wingdings 1 — the original 1990 dingbat font shipped with Windows 3.1, not Wingdings 2, 3, or Webdings. The key order has never changed, so every correct converter should agree on which symbol belongs to which letter.

They don't always agree, and the reason is Unicode, not the game. Wingdings predates its own Unicode mapping: the official code points were only added in Unicode 7.0, in 2014. Tools built before that had to substitute whatever looked closest, and a few of those approximations are still in circulation.

Neither is "wrong" in the sense of being broken — both render, and both are readable. But if you're comparing two Gaster wingdings outputs and they differ, this table is usually why. Switch the mapping above to compare both conventions side by side; the chart flags every key where they diverge.

Two things turn Gaster's text into empty rectangles and question marks when you paste it somewhere else.

The first is fonts. Those symbols live in the Wingdings font, and an app that doesn't have it will substitute a generic "missing character" box. The second is invisible characters. Wingdings symbols are often copied with a variation selector — an invisible character that tells the receiving app "show this in text style" — and some apps choke on it or render it as a stray glyph.

Both have the same fix: use the Text symbol style above. It outputs plain Unicode characters that display anywhere, with no font required and no stray invisible bytes. If you need it to look exactly like the game screen, screenshot the output instead of copying the text.

This W.D. Gaster translator runs entirely in your browser — nothing you paste is uploaded or stored.

W.D. Gaster is a character in Undertale who is never encountered in a normal playthrough. He exists in the game's files and in a hidden room that only appears under specific conditions, speaks in Wingdings, and is never named on screen — the name comes from data and from the community. His dialogue is the reason a Gaster translator is useful at all.

The initials are widely read as a nod to Wingdings, though the game itself never states it. Whether Gaster is related to any of the main characters, and how he came to be scattered across time and space, are popular fan theories rather than confirmed story. The game leaves them open on purpose.