Create Undertale and Deltarune dialogue boxes with pixel fonts, portraits, animations, and exports as PNG, GIF, or MP4.

undertaletextboxgenerator.online
Undertale Text Gen homepage screenshot

About Undertale Text Gen

Undertale Text Gen is a browser-based tool for building Undertale- and Deltarune-style dialogue boxes. You type dialogue, pick a font and character portrait, choose a border style, preview the letter-by-letter typewriter animation, and export the result as a PNG, GIF, or MP4 with typing sound. Finished boxes can also be shared via links or collected in a stack of up to 30 items. The site describes itself as free and accepts optional donations; the homepage does not state terms for commercial use of the output.

Key features

  • Pixel fonts: Determination Mono, Sans Comic Style, Papyrus Decorative
  • Portrait library with Undertale, Deltarune and AU sprites, plus uploads
  • Typewriter animation preview with adjustable reveal speed and timing
  • Export as transparent PNG, looping GIF, or MP4 with sound
  • 12 border presets covering official, AU, tribute and custom frames
  • Share links and a box stacker holding up to 30 boxes
Best for: Fans and creators making Undertale- or Deltarune-style dialogue images for fan content, memes, roleplay, or social posts.
Good for
  • Combines fonts, portraits, border styles and animation in one browser tool
  • Multiple export formats, including transparent PNG and MP4 with typing sound
  • Offers built-in character sprites alongside custom portrait uploads
Watch out for
  • Runs only in a web browser; no desktop or offline version is described
  • Box stacker is capped at 30 saved boxes
  • The homepage does not state commercial-use terms for generated images

Undertale Text Gen at a glance

Type
Online tool
Pricing
Not confirmed. Check the site
Platforms
Web
Open source
Not stated
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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Undertale Text Gen FAQ

How do I add color to dialogue text?
Use backslash color codes in the text field, such as \yellow or \red, described on the site as changing the text color.
What export formats are supported?
PNG images with transparent or black backgrounds, looping GIFs, and MP4 video with typing sound. MP4 is exported separately so the video can keep sound.
How many boxes can I keep in the stack?
The Box Stacker shows a limit of 30 items, with an option to export or clear the stack.
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