A downloadable tool for Windows

Squint is a live upscaler companion program for Aseprite that allows you to see live what your drawing would look like upscaled through one those filters:

  • xBR-lv1-noblend (simpler, but less fancy)
  • xBR-lv2 (fancier with extra smoothness and settings

It is provided with a Lua script that has to be run by Aseprite to make the connection with the tool.

Using Squint

  1. Launch squint. It should be waiting for a connection.
  2. Open Aseprite and the sprite you want to upscale
  3. Launch the client script.
  4. A small window should appear in Aseprite. It's non-blocking, you can still edit your sprite while it's on, just leave it out of your way.
  5. Aseprite is now trying to connect to squint.
  6. Once squint shows your sprite, it's ready to go!


  • F1 to toggle the help screen.
  • F2 to toggle the background's color between white and dark gray.
  • Right-click or TAB to toggle the options screen.
  • S to save the current result into saved.png.
  • F12 to screenshot.


  • ? - I can't find the script option in the File Menu
    • Sounds like you either have an outdated version of Aseprite. Please make sure to have a recent one. 1.2.30 should be the first version fully compatible with squint.
    • For linux tinkerers: some repositories can have or make build a version without this feature. You might need to to build your own version of Aseprite.

Thanks to

  • David Capello for Aseprite, of course.
  • Lampysprites for working on Pribambase and having Aseprite be added WebSocket support and providing a sample project that kickstarted squint's development.
  • Raysan5 for working on Raylib, the framework squint is based on.
StatusIn development
Rated 5.0 out of 5 stars
Made withraylib
Tagsaseprite, Pixel Art, tool, upscaler
Code licenseMIT License
LinksSource code

Install instructions

Aseprite setup

  1. You need a recent version of Aseprite (at least 1.2.30).
  2. Install the extension named `squint-client.aseprite-extension`. Either double-click the file or install it through Aseprite by locating the "Extensions" tab in the Preferences menu, pressing the "Add Extension" button and locating the extension.
  3. If you find the "Connect to Squint" menu entry in the File menu, you should be ready to go!


squint-windows-x64-0.2.1.zip 249 kB

Development log


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Would love a macOS version 🥺

Ha! as soon as I saw this I thought of Polyducks and Tarius, lol

Actually, if you check this specific Twitter thread, you'll see that both of them gave me the inspiration to do this tool!

This is looking incredible! Excited to see how it develops.