Ditto ChaiScripts (JSON / JS Minifiers)

Small clipboard minifiers for Ditto Clipboard Manager.

This repo exists mainly to help people (especially n8n users) copy large JSON workflows or JavaScript snippets and paste them into AI tools (ChatGPT/Claude/etc.) with fewer wasted tokens.

Context / feature request in Ditto:

• sabrogden/Ditto#1046

What scripts are included

• UnifiedMinify.chai (recommended)
  • Automatically detects JSON vs JavaScript and runs the right minifier.
• JsonMinify.chai
  • JSON-only minifier.
• JSMinify.chai
  • JavaScript-only minifier (tries hard to avoid running on JSON).

Quick start (copy/paste into Ditto)

These scripts are designed to run as On Copy scripts. If you prefer to keep the original (pretty) JSON in your Ditto history and only minify right before pasting into ChatGPT/Claude/etc., you can also use them as On Paste scripts.

1. Open Ditto.
2. Go to Options -> Advanced -> On Copy Scripts.
3. Add a new script.
4. Open UnifiedMinify.chai in this repo, copy all of it, and paste it into the Ditto script editor.
5. Enable the script and click OK.
6. Copy formatted JSON or JavaScript, then paste somewhere (Notepad is fine) to confirm it was minified.

Optional (On Paste setup):

1. Go to Options -> Advanced -> On Paste Scripts.
2. Add the script the same way (copy/paste contents).

Notes:

• Enable only one of these minifier scripts at a time (otherwise you may process the same text twice).
• Ditto scripting is ASCII-only (clip.GetAsciiString()), which is a Ditto/ChaiScript limitation.

n8n: why this helps

n8n users frequently copy:

• Workflow exports (large JSON)
• Code/Function node snippets (JavaScript)

Pretty-printed JSON wastes AI tokens because whitespace becomes tokens. Minifying often reduces the size of workflow JSON dramatically (commonly 40-60% smaller).

Example n8n workflow export:

1. Export workflow (JSON) in n8n.
2. Copy it.
3. Ditto minifies automatically.
4. Paste into ChatGPT/Claude to review or refactor the workflow.

How the scripts behave (high level)

All scripts:

• Run locally inside Ditto.
• Modify only the clipboard text.
• Return false (so they do not cancel the copy operation).
• Intentionally skip content that is already compact (e.g., single line) to keep Ditto fast.

UnifiedMinify.chai

• If the first non-whitespace character is { or [, it treats the clip as JSON.
• Otherwise it uses a small “JS score” (looks for things like function, =>, const/let/var, class, import/export, etc.).
• Preserves JavaScript comments (// and /* */) and supports shebangs.

Limits:

• Skips clips over ~1MB.

JsonMinify.chai

• Intended for JSON only.
• Does basic brace/bracket balance validation, then applies a few regex replacements.

Limits:

• Skips clips over ~1MB.

JSMinify.chai

• Intended for JavaScript only.
• Rejects content that starts with { or [ to avoid JSON.
• Requires a minimum JS indicator score.

Limits:

• Skips clips over ~500KB.

Troubleshooting

• If nothing changes when you copy

  • Ensure the script is enabled in Options -> Advanced -> On Copy Scripts.
  • Restart Ditto.

• If JSON doesn't minify

  • The first non-whitespace character must be { or [.
  • If it is already a single line, the script intentionally skips.

• If JavaScript doesn't minify

  • The snippet must contain enough JS indicators (const, function, =>, etc.).
  • If it is already a single line, the script intentionally skips.

Security

These scripts:

• Do not make network requests.
• Do not write files.

References

• Ditto scripting wiki: https://github.com/sabrogden/Ditto/wiki/Scripting

License

MIT (see LICENSE).