Rapidool — Native macOS Computational Scratchpad & Smart Developer Workspace

Everyday Utilities

Stop switching between utility websites. 100% local

Rapidool replaces your browser tabs with native tools that keep your data private and process text instantly.

Working with APIs, Regex & Code

Instead of opening a slow web tool, prepend a block of text with @ to transform it into a dedicated environment.

@code / @html

Run JS scripts natively or render live HTML/CSS previews.

@diff

Compare any two diff sections within a file instantly.

@regex

Test regular expressions with real-time match highlighting.

@GET / Mock APIs

Host local endpoints for your frontend to fetch data from.

Working with Dates & Math

Developers constantly evaluate timestamps and quick math. The gutter actively scans your text to evaluate equations, epoch timestamps, dates, and Base64 strings, rendering the results instantly without an external calculator.

Working with Colors & Encoding

Selecting text opens dedicated popover tools. Pick a color to see its hex/RGB/HSL values, select a date to open a calendar view, or inspect a JWT's decoded payload safely on your machine.

Working with JSON & UUIDs

Format JSON instantly without pasting your payload into a random ad-supported formatter website. Press Cmd+Shift+Space anywhere in macOS to drop down the Rapidool Bar and run generators like /uuid or JSON formatters on your clipboard.

Pragmatic Developer Sandbox

No web latency. No cloud account requirements. Just a native, local-first workspace for raw text, formatting, and computational tools.

Ghost Gutter evaluation displaying math and date parses

Background Mock HTTP API server host details

Gutter swatches and custom visual color selector

Practical Automation

Built for High-Velocity Developer Workflows

Rapidool connects code runtimes, inspectors, and mock servers into side-by-side editing workflows.

Data Processing

Process JSON & Code Instantly

Paste raw JSON payloads, decode JWT tokens using the Inspector, and auto-format payloads with a quick Command Bar action. Write a quick @code JS block to extract specific fields—all without leaving your editor or opening browser tabs.

Auto-Format JSON Inline JWT Decoder Native JS Runtime

Formatting JSON and decoding JWTs inline

UI Design Sandbox

Build UIs with Live Visual Feedback

Drafting a UI component or layout? Drop your HTML and CSS into an @html block and render it live in the side panel. Click any hex code to launch the Color Inspector, visually pick colors, and copy HSL/RGB values instantly.

Live HTML Render Visual Color Inspector Hex/RGB/HSL Conversions

Visual color inspector and HTML sandbox preview

Local Servers

Mock APIs for Frontend Development

Need to test frontend or mobile app fetch logic before backend routes are ready? Paste desired JSON payloads, prepend @GET /api/v1/users, and Rapidool spins up a local server on port 9090 serving data instantly.

Local HTTP Server Custom Endpoint Routes Zero Cloud Deployment

Privacy AI

Stream Code Generation with Local AI

Generate boilerplate code or transform unstructured data safely. Execute /gen to stream AI code writing character-by-character directly inside your active document, powered by your local Ollama instance with zero telemetry.

Local Ollama Engine Private API Keys Real-Time Code Stream

AI text generation powered by local Ollama server

Specifications

All Features at a Glance

Comprehensive offline capabilities built natively into macOS.

Sections (`@`)

@code for native JS execution
@html for live UI previews
@regex with match highlighting
@diff for comparing text blocks
@GET / POST for Mock API servers

Inspectors & Gutter

Visual Color Picker & Conversions
JWT Token Decoder
Epoch Date Calendar Explorer
Math Step-by-Step Solver
Base64 Decode & File Preview

System & Engine

100% Offline, Local-First Engine
Global Floating Rapidool Bar
Local Ollama AI Integration
Custom Script/Command Support
Native macOS App Interface

Use Cases

Developer Workflows

Use Case

FAQ

A local developer toolbox keeps your sensitive data (like API keys, customer JSON payloads, and proprietary code) off third-party servers. It's also much faster than opening a browser tab, finding a site, and dealing with ads or latency.

Yes. Rapidool replaces dozens of single-purpose websites for JSON formatting, JWT decoding, Base64 encoding, epoch time conversion, and regex testing by bringing them all into one native macOS app.

No. Rapidool is designed local-first. Text scanning, math evaluation, JS runtimes, formatting, and mock HTTP routing run 100% on your local macOS machine. No server syncing or telemetry is used (unless you point it to a remote Ollama server for AI prompts).

Yes. You can define mock endpoints using supported HTTP methods and custom route paths (e.g., @GET /api/v1/users) directly inside your document. Rapidool serves these endpoints locally on port 9090, meaning your active web browser, curl command, or mobile client can query them instantly without spinning up a real backend.

Yes. By creating an @regex section, you can test regular expressions with real-time match highlighting against your sample text directly in the editor.

Yes. Rapidool scans the ~/.rapidool/scripts folder for JS files. Any script added there automatically behaves as a command in the Command Bar (e.g. /myCustomFormatter), transforming document text and returning output directly inline.

Rapidool integrates exclusively with Ollama as the AI provider. You can point it to your local Ollama instance (or a custom Ollama endpoint) to run models like Llama, Mistral, or Gemma. Since Ollama runs models locally on your machine, your code prompts and text data remain 100% private and never leave your device.

Rapidool is available on the macOS App Store with a 7-day free trial. After the trial, you can choose between a monthly subscription or a lifetime purchase option. It requires macOS 26 or later.

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