Complete Guide to GitHub Badges for Your README
Learn how to add shields.io badges, GitHub stats cards, and tool badges to your GitHub profile README. Includes ready-to-use code for 50+ popular technologies.
GitHub README badges are small, colorful labels that instantly communicate your skills, tools, and project status. A single row of badges can tell a visitor more about your stack than three paragraphs of text.
This guide covers everything you need to know: how badges work, how to create them with shields.io, and ready-to-copy code for over 50 popular technologies.
What Are GitHub README Badges?
A GitHub README badge is an SVG image served from an API endpoint. When GitHub renders your README, it fetches the image and displays it inline. The result looks like a pill-shaped label with an icon, text, and color.
The most common badge service is shields.io — a free, open-source API that generates badges for hundreds of technologies and use cases.
A typical badge URL looks like this:
https://img.shields.io/badge/{label}-{message}-{color}?style={style}&logo={logo}&logoColor={logoColor}
And in Markdown:
Badge Styles
Shields.io supports five visual styles. Choose one and use it consistently across all badges:
| Style | Example URL Parameter | Appearance |
|-------|----------------------|------------|
| flat | ?style=flat | Clean, flat color |
| flat-square | ?style=flat-square | Flat with square edges |
| plastic | ?style=plastic | 3D gradient look |
| for-the-badge | ?style=for-the-badge | Large, all-caps text |
| social | ?style=social | GitHub-style, good for follower counts |
Most developers use flat or for-the-badge. Use flat for clean, professional profiles; for-the-badge for bold, visually prominent stacks.
Tech Stack Badges
Frontend
Backend
DevOps & Cloud
Databases
For per-tool badge guides with badge grids and setup instructions, see our Tools section.
GitHub Stats Badges
Beyond tech stack badges, you can embed live stats from your GitHub account.
GitHub Stats Card
Replace YOUR_USERNAME with your actual GitHub username. This card shows:
- Total stars earned
- Total commits (this year)
- PRs and issues opened
- Contribution streak
Top Languages Card
Shows the languages you use most across your public repositories:
GitHub Streak Stats
Displays your current contribution streak:
Social & Profile Badges
Profile Views Counter
Followers Badge
Twitter/X Badge
Best Practices for Badges
Keep it focused. 20 badges is too many. Aim for 8–12 that represent your actual core skills. A badge for every technology you've touched once dilutes the signal.
Group related badges. Arrange badges by category: Languages → Frameworks → Tools → Cloud. This makes scanning easier.
Use consistent style. Pick one style (flat, for-the-badge, etc.) and stick to it. Mixing styles looks messy.
Match colors to brand. Shields.io uses official brand colors by default when you pass a logo= parameter. Use those unless you have a strong reason to override.
Use logoColor=white on dark backgrounds and logoColor=black on light backgrounds for maximum contrast.
Finding the Right Logo Name
The logo= parameter uses Simple Icons slugs. Common gotchas:
| Technology | Correct slug |
|------------|-------------|
| Next.js | nextdotjs |
| Vue.js | vuedotjs |
| Node.js | nodedotjs |
| AWS | amazonaws |
| GitHub Actions | githubactions |
When in doubt, search at simpleicons.org to find the exact slug.
Frequently Asked Questions
Do badges slow down my profile page? Shields.io badges are served via CDN and cached aggressively, so the performance impact is minimal. Dynamic badges (GitHub stats cards) make a network request each time the page loads, but GitHub caches them for up to 30 minutes.
Can I create custom badges?
Yes. The shields.io endpoint format https://img.shields.io/badge/{label}-{message}-{color} lets you create any label/message combination with any hex color. No API key required.
Why is my badge showing as broken?
Common causes: incorrect logo slug, unsupported character in the URL (use _ instead of spaces), or the stats service being temporarily down. Test your badge URL directly in the browser before adding it to your README.
What's the difference between static and dynamic badges?
Static badges (from shields.io/badge/) are hardcoded and never change. Dynamic badges (like GitHub stats cards or npm download counts) fetch live data on each render. Use dynamic badges for metrics you want to stay current, static badges for your tech stack.