Slash Command Builder

Build slash command JSON with Discord constraint validation.

Part of BlancoKit, a free Discord toolkit.

How to use

Enter command name (lowercase, 1–32 chars, letters/numbers/_/-) and description (required, max 100 chars).
Add top-level options only — subcommands and subcommand groups are not supported in this builder.
Fix validation errors, then copy JSON for POST /applications/{application.id}/commands (global or guild endpoint).
For button/select custom_id strings on the same bot, validate with custom_id Validator.

Lowercase names, 32-char command name, 100-char descriptions, max 25 options, and max 25 choices per string/number option.

Enter command name (lowercase, 1–32 chars, letters/numbers/_/-) and description (required, max 100 chars).

Add top-level options only — subcommands and subcommand groups are not supported in this builder.