Tool webpage can be found here: https://meguminbot.github.io/fnf-chart-info-tool/

The FNF Chart Info Tool is a web-based utility designed to analyze and display information about chart files used in Friday Night Funkin' (FNF). This tool supports multiple FNF engines and provides information about the chart, including note counts, BPM, scroll speeds, and more.

Mainly intended to for Funkipedia Wiki editors!

• Supported Engines:

  • V-Slice Engine
  • Psych Engine
  • Codename Engine
  • Kade Engine
  • Forever Engine
  • and any other engine relying on old pre-vslice chart format

• Upcoming Support:

  • Scroll Speed Change detection for all engines.
  • Saving the output.

• "MAYBE" Upcoming support

  • 5K+ charts, currently only works with 4 keys.
    • This would be the last thing I add in that case, everything else takes priority.

• Key Features:

  • Drag-and-drop or file upload support for .json chart files.
  • Automatically detects the engine type for the uploaded chart files.
  • Supports event files for Psych Engine
  • Supports metadata files for V-Slice and Codename engines.
  • Displays detailed chart information, including:
    • BPM (with changes, if applicable).
    • Scroll speeds.
    • Note counts per key. (For player side)
    • Maximum combo (For player side).
    • Maximum score based on score multiplier (For player side)
      • Various FNF mods and engines may have different score for a perfect hit, you can customize the multiplier.

1. Upload Files:

   • Drag and drop .json files into the designated area, or click the "Select Files" button to upload.
   • You can upload a single chart file or both the chart+supported extra file type (e.g events or metadata files)
     • V-Slice and Codename engine requires the metadata file to display some information like Song name, BPM and Scroll Speed.

2. View Chart Information:

   • The tool will process the uploaded files and display information about the chart, including:
     • Detected engine type.
     • Song name, BPM, and scroll speed.
     • Note counts for each key.
     • Maximum combo and score.

3. Customize Score Multiplier:

   • Enter a custom score multiplier in the input field and click "Update" to recalculate the maximum score. Defaults to 350.

This tool is hosted on GitHub Pages and can be accessed directly via your browser. No installation is required.