ua-parser-js
Parse user-agent strings to detect browser, engine, OS, CPU and device type.
Utilities npm AGPL-3.0-or-later
Used in agent projects
25
0.2% of 12,697 public repos built with AI coding agents
Rank in utilities
#88 of 109
by use in those projects
Downloads
32.6M
npm, last 7 days, ua-parser-js
GitHub stars
10.2K
last push Sep 29, 2026
How ua-parser-js is used
ua-parser-js is a dependency in 25 of the 12,697 public GitHub projects set up for AI coding agents that we scanned (0.2%), #88 of 109 in utilities. The most used alternative there is clsx. Projects that use it most often also use Zod (80.0%), Tailwind Merge (64.0%), Class Variance Authority (60.0%).
Often used with ua-parser-js
| Zod | 80.0% of ua-parser-js projects · 4.7× more than average |
|---|---|
| Tailwind Merge | 64.0% of ua-parser-js projects · 3.8× more than average |
| Class Variance Authority | 60.0% of ua-parser-js projects · 4.3× more than average |
| date-fns | 56.0% of ua-parser-js projects · 6.6× more than average |
| clsx | 60.0% of ua-parser-js projects · 3.4× more than average |
| Lucide React | 60.0% of ua-parser-js projects · 3.0× more than average |
| React Hook Form | 44.0% of ua-parser-js projects · 5.5× more than average |
| Sonner | 44.0% of ua-parser-js projects · 5.5× more than average |
By coding agent
| Claude Code | 0.4% of projects set up for it |
|---|---|
| Cursor | 0.5% of projects set up for it |
| GitHub Copilot | 0.3% of projects set up for it |
Share of public repos configured for each agent that list ua-parser-js as a dependency.
Install
| Package | npm install ua-parser-js |
|---|---|
| Main stacks | Next.js (13), TypeScript / JavaScript (11), PHP (1) |
| Example projects | Hyk260/PureChat, prosopo/captcha, kupzed/catatz, LastBotInc/nextjs-supabase-ai-webapp, finitoapp/payky |
Alternatives to ua-parser-js
| Tool | Used in agent projects | Downloads / wk | GitHub stars | License |
|---|---|---|---|---|
| clsx npm Tiny utility for conditionally constructing className strings. |
2,251 (17.7%) | 126M | 9,847 | MIT |
| date-fns npm Modern JavaScript date utility library with comprehensive formatting functions. |
1,079 (8.5%) | 97.6M | 36.6K | MIT |
| uuid npm Generate RFC9562 compliant UUIDs for unique identifiers in applications. |
454 (3.6%) | 296M | 15.3K | MIT |
| PyYAML pypi YAML parser and emitter for reading and writing YAML configuration files. |
385 (3.0%) | 239M | 2,954 | MIT |
| Lodash npm Modular utility library with methods for common programming tasks and data manipulation. |
269 (2.1%) | 162M | 61.4K | MIT |
| bn.js npm Big number library for handling arbitrary-precision integers in JavaScript. |
217 (1.7%) | 62.1M | 1,230 | MIT |
| python-dateutil pypi Extensions to Python's datetime module for advanced date and time manipulation. |
165 (1.3%) | 233M | 2,638 | Dual License |
| yaml npm JavaScript YAML parser and stringifier with full spec compliance. |
164 (1.3%) | 179M | 1,693 | ISC |