C64 BASIC emulator

3rd party credits

Changelog

3.1 (2025-12-05)
- Responsive design for wider screens
- Added CTRL+L shortcut to load BASIC
- Fixed issue with white or invisible cursor
- Improved warning messages
- Allowed execution of lines even when out of numerical order

3.0 (2025-06-06)
- All byte values (0–255) are now accepted as valid input
- Macro repetition patterns are preserved during conversions
- Empty lines are now allowed (a warning will be issued)
- Fixed tokenization length limit (now correctly capped at 250 bytes)
- BASIC length calculations now take macros into account

2.1 (2024-12-10)
- Optimized and improved warnings 
- Added PRG hash, size and BASIC size

2.0 (2023-12-18)
- Rewrote the converter, fixing numerous bugs. 
- Added support for mixed-case (CBM prg Studio)
- Removed macro support for {chr192} {$192} lists {CLR,PI} or {$40,41,42,32}
- Added BasText macro definitions
- Added upload BASIC and PRG files
- Added download PRG button
- Link is now generated inline

1.4 (2023-06-11) 
- Improved error messages
- Added 80 characters with abbreviations validation
- Added new byte macros e.g {chr192} or {$192}
- Added macro list support e.g. {CLR,PI} or {$40,41,42,32}

1.3 (2023-01-06)
- If first line has a REM statement, this should be the HTML title

1.2 (2023-01-03)
- Autostart BASIC in emulator
- Emulator in top of screen
- Added favicon
- Added og:image generated from code (image preview in Facebook) 
- Added parse error handling (shown in a messagebox)

1.1 (2023-01-01)
- Added PETSCII charset
- Added marcro support
- Added keyword abbreviation support

1.0 (2022-12-30)
- First version online. Translates a subset of BASIC code into executable PRG format