Chart Generator Free lets you create terminal-ready ASCII, HTML, and SVG charts from a single Bash command.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install chart-gen-free
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install chart-gen-free using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Chart Generator Free?
Chart Generator Free is a lightweight, zero-dependency visualization skill designed for command-line workflows. It turns simple input strings into readable charts, including bar charts, line charts, pie charts, tables, sparklines, heatmaps, progress bars, and SVG outputs for sharing or embedding.
Built for speed and portability, Openclaw Skills like this one are ideal when you need fast data visualization without installing Python plotting stacks or frontend chart libraries. It focuses on immediate terminal output, easy HTML/SVG export, and one-command usability for agents and developers working in Bash environments.
Chart Generator Free Use Cases
- Quickly compare departmental budgets, sales figures, or KPI values directly in the terminal.
- Convert monitoring metrics into compact sparklines for logs, scripts, or dashboards.
- Generate HTML charts for sharing in reports, wiki pages, or browser-based previews.
- Export SVG charts for documents, presentations, or embeddable visuals.
- Render simple tables and matrix heatmaps from structured text input.
- Use Openclaw Skills to turn raw numbers into readable visuals without extra dependencies.
- Build lightweight reporting workflows in CI, automation scripts, or agent-driven tasks.
How Chart Generator Free Works
- The agent or user invokes the Bash script with a chart type and a compact input string.
- The skill parses the input format, such as key-value pairs, numeric series, tables, or matrices.
- It normalizes the values, applies the selected rendering logic, and prepares the chart output.
- Depending on the command, it prints an ASCII visualization in the terminal or writes HTML/SVG to a file.
- It returns structured execution feedback so the calling agent can continue chaining actions.
- Openclaw Skills can then use the generated artifact in reports, dashboards, or downstream automation steps.
Chart Generator Free Setup
- Ensure your environment supports Bash 4.0+.
- On Windows, use WSL or Git Bash because native PowerShell does not support Bash script syntax.
- Locate the skill script in the skill directory and run it directly; no extra installation is required.
- Use absolute paths for generated SVG or HTML files when calling the script from automation.
- Verify the available commands with the help action.
chart.sh help
- Run a simple test chart to confirm the skill is working.
chart.sh bar "A:30,B:50,C:20" --title "Example"
- For browser-viewable output, direct the skill to write an HTML file.
chart.sh html-bar "A:30,B:50,C:20" --output chart.html
Chart Generator Free Data Schema & Taxonomy
The skill organizes chart input into a small set of command-friendly data schemas that Openclaw Skills can parse consistently.
| Data Type | Format | Used By |
|---|---|---|
| Key-value pairs | "Label:Value,Label:Value" |
bar, pie, html-bar, svg-bar, svg-pie |
| Numeric series | "1,5,3,8,2,7" |
line, sparkline, trend, progress |
| Table rows | `"H1,H2,H3 | R1C1,R1C2,R1C3 |
| Matrix/grid | `"1,2,3 | 4,5,6 |
Output artifacts
- Terminal ASCII output: Bar charts, line charts, pie charts, sparklines, progress bars, tables, trends, and heatmaps.
- HTML files: Interactive or embeddable browser-friendly chart pages.
- SVG files: Scalable vector charts suitable for reports and documents.
Metadata and options taxonomy
--title: Sets the chart title for supported ASCII and SVG commands.--output: Writes HTML output to a specified path.--color: Applies SVG theme coloring such asblue,green,red, orrainbow.
Execution parameters
input_params: Core chart input and required command arguments.config_options: Mutation and reset style settings for chart behavior.output_format: Export, save, or conversion preferences for generated output.
Chart Generator Free Advanced Features
- Zero-dependency Bash execution with no Python, matplotlib, or ECharts installation.
- Dual output modes: terminal ASCII for quick inspection and HTML/SVG for sharing or embedding.
- Wide chart coverage, including bar, line, pie, table, sparkline, dashboard scaffold, progress, trend, heatmap, and SVG variants.
- Optimized for AI agent workflows in Claude Code, Cursor, Codex, Gemini CLI, and similar environments.
- Lightweight automation-friendly design that fits CI scripts, reporting tasks, and local shell pipelines.
- Built-in guidance for absolute paths, monospace terminal fonts, and table validation to reduce rendering issues.
- Openclaw Skills supports immediate chart generation with minimal setup, making it easy to plug into developer workflows.
SKILL.md
Loading
Related Openclaw Skills
Chat Toolkit Free
Openclaw Skills Chat Toolkit Free helps AI agents learn and apply user communication preferences from explicit feedback, storing them locally for consistent, reusable responses.
OKF (Open Knowledge Format) Skill
Openclaw Skills for OKF helps AI agents read, create, validate, and traverse vendor-neutral knowledge bundles stored as markdown files with YAML frontmatter.
Code Analysis Toolkit Free
A local, privacy-respecting Git history analysis and self-reflection tool that generates descriptive style and quality reports for personal developers.
GitHub Dev Standard Free
A structured 9-step development workflow and quality gate system for AI agents, preventing scope creep and ensuring tested code deliveries.
Audit Toolkit Free
Audit Toolkit Free is a structured, multi-domain verification skill for turning AI-generated outputs into traceable, evidence-based audit results.
QQ空间相册入门工具
Openclaw Skills for logging into QQ Space, browsing albums, viewing photos, and downloading single images through a lightweight command workflow.
Featured*
