Slack Workflow Step JSON Builder

Slack Workflow Step JSON Builder — build a ready-to-paste config or snippet in seconds. 100% client-side, no sign-up.

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Scaffold a Slack custom workflow step (DefineFunction) for the modern Deno Slack SDK / Workflow Builder. Define inputs and copy the function definition.

Step titlecallback_id

Input parameters

import { DefineFunction, Schema } from "deno-slack-sdk/mod.ts";

export const send_greeting = DefineFunction({
  callback_id: "send_greeting",
  title: "Send greeting",
  source_file: "functions/send_greeting.ts",
  input_parameters: {
    properties: {
      recipient: { type: Schema.slack.types.user_id, title: "Recipient" },
      message: { type: Schema.types.string, title: "Message" }
    },
    required: ["recipient", "message"],
  },
  output_parameters: { properties: {}, required: [] },
});

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About Slack Workflow Step JSON Builder

Slack Workflow Step JSON Builder is a free Slack tool that lets you build a correct JSON in clicks instead of digging through docs — no guesswork, no docs. Copy the JSON and paste it straight into Slack or your Slack app config. It runs entirely in your browser with no sign-up and no installs, so your data stays private.

How to use Slack Workflow Step JSON Builder

1Open Slack Workflow Step JSON Builder — it loads instantly and runs entirely in your browser.
2Fill in the fields with your own values; the output updates live as you type.
3Review the generated JSON in the preview area.
4Copy the JSON and paste it straight into Slack or your Slack app config.

Why use Slack Workflow Step JSON Builder?

✓Generates a valid JSON in seconds — no copy-pasting from docs
✓100% client-side: your inputs never leave your browser
✓Free and unlimited — no account, no trial, no credit card
✓Works on desktop and mobile; copy or download the JSON instantly

Frequently asked questions

Is Slack Workflow Step JSON Builder free?+

Yes. Slack Workflow Step JSON Builder is completely free with no account, no trial and no usage limits. ToolJolt is supported by unobtrusive ads, not paywalls.

Where do I paste the output from Slack Workflow Step JSON Builder?+

Click Copy, then paste the JSON into Slack or your Slack app config. Each tool's preview shows exactly what to add and where, so you can drop it in and save without reading the docs.

Is my data private?+

Completely. Slack Workflow Step JSON Builder runs 100% in your browser (client-side). Nothing you type is uploaded to a server, so your data stays on your device.

Do I need to sign up or install anything?+

No. There's nothing to install and no sign-up — just open the page and start. It works on desktop and mobile.

Do I need to be a Slack admin?+

For most outputs, no — you can paste messages, reminders and Block Kit straight into Slack. Installing apps or custom emoji may require workspace admin rights.

Can I use the output commercially?+

Yes. The configuration, code or files you generate are yours to use in personal and commercial projects without attribution.