Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
User-Agent Parser
Parse and identify browser, OS, device type, engine, and bots from any User-Agent string
- Home
- /
- User-Agent Parser
🌐
-
-
Device: -
Engine: -
Browser: -
Version: -
OS: -
OS Version: -
CPU: -
Parsed Details
Enter a User-Agent string and click Parse
What Is a User-Agent String?
A User-Agent (UA) string is a text header that web browsers and other HTTP clients send to web servers to identify themselves. It typically contains information about the browser name and version, operating system, device type, and rendering engine. For example, a Chrome UA string reveals the browser version, the underlying OS (Windows, macOS, Linux, Android, iOS), and whether the device is a desktop, mobile, or tablet. This parser extracts and displays all available information from any User-Agent string. Developers use it for analytics processing (identifying visitor devices and browsers), debugging (verifying correct UA detection), bot detection (identifying crawlers and scrapers), and content negotiation (delivering optimized content based on device capabilities).
How to Use This Tool
- Paste a User-Agent string — Enter or paste any User-Agent string into the input area.
- Click Parse — The tool analyzes the string and extracts browser, OS, device, and engine information.
- Review the results — Parsed details are displayed in a structured card showing device type, engine, browser name, browser version, OS name, OS version, and CPU architecture.
- Use examples — Click the example buttons (Chrome, Firefox, Safari, Bot, Mobile) to see parsed results for different user agents.
- Identify bots — Bots and crawlers are flagged with a red BOT badge for quick identification.
Frequently Asked Questions
Is my data sent to a server?
No. All processing is performed locally in your browser. The User-Agent string never leaves your device.
Can this detect all browsers?
The parser covers major browsers (Chrome, Firefox, Safari, Edge, Opera, Samsung Internet) and their mobile variants. It also identifies common bots (Googlebot, Bingbot, DuckDuckBot, etc.).
What information can I extract?
The tool extracts browser name and version, operating system name and version, device type (desktop, mobile, tablet), rendering engine (Blink, WebKit, Gecko, etc.), and CPU architecture.
Can I parse multiple User-Agent strings?
The tool parses one string at a time. For bulk parsing, you can use the tool repeatedly or integrate a UA parsing library into your application.
Is this tool free to use?
Yes. This tool is completely free with no usage limits or registration required.
Last updated: 17 Aug 2026
Blog
Latest from Our Blog
How to Choose a Hash Algorithm for Data Security
A practical decision guide to choosing the right hash algorithm: MD5, SHA-1, SHA-2, SHA-3, bcrypt, argon2, PBKDF2, and SRI, with comparisons and clear recommendations.
Aug 08, 2026
CSS vs Tailwind CSS: Which One Should You Use?
A thorough, practical comparison of hand-written CSS and Tailwind CSS: learning curve, maintainability, performance, team workflows, and when each approach wins.
Aug 08, 2026
How to Optimize Core Web Vitals for Your Website
Learn practical, step-by-step techniques to improve LCP, INP, and CLS on your website. A developer-focused guide with real measurements and fixes.
Aug 08, 2026
How to Use Base64 Encoding in Real Projects
Learn practical, production-ready ways to use Base64 encoding: data URLs for images, JWT payloads, API tokens, and email attachments, with real code examples.
Aug 08, 2026
AES Encryption Explained: How It Works and Why It Matters
Learn how AES encryption works, the differences between AES-128, AES-192, and AES-256, and how to encrypt and decrypt data online.
Jun 23, 2026