3rd party credits
C64 BASIC Tokenizer, Detokenizer and Converter by Stig Christensen
The emulator is made by Thomas Hochgoetz
C64 font by style64.org
Changelog
4.0 (2026-06-08)
- Added D64 support.
- Added HEX viewer.
- Added support for petcat and c64list macros.
- Added hexadecimal and decimal macro definitions, e.g. {$FF}.
- Fixed macros not working correctly with quoted strings or opcodes.
- Fixed warnings containing encoded HTML.
- Fixed some issues when uploading ISO-8859-1 encoded BASIC and non-BASIC files.
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)
- Improved warning messages
- 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 macro support
- Added keyword abbreviation support
1.0 (2022-12-30)
- First version online. Translates a subset of BASIC code into executable PRG format