Free browser header tool

User Agent Generator

Generate realistic User-Agent strings for browser testing, QA, analytics debugging, and request simulation. Choose a browser and platform or randomize instantly.

User Agent Generator

User-Agent string

Input
Output
Run the tool to see output here.
ChromeSafariFirefoxEdge

User agents for testing and debugging

User-Agent headers help teams reproduce browser-specific behavior in test clients, logs, and request tooling.

Common browser profiles

Generate strings for Chrome, Safari, Firefox, and Edge across desktop and mobile platforms.

Instant randomization

Create a fresh valid-looking string when you need quick test variation.

Copy-ready output

Paste the generated value into curl, Postman, test clients, QA tools, or logs.

How it works

Each tool is designed around a direct job: provide the input, get a useful output, and move it into your workflow.

1

Choose a browser

Select Chrome, Safari, Firefox, Edge, or random.

2

Choose a platform

Pick desktop, iPhone, iPad, Android, or random.

3

Copy the header

Use the generated string as a User-Agent request header.

Built for practical workflows

These tools are small on purpose: they solve the conversion job quickly, then point teams toward the API path when the workflow becomes recurring or high volume.

QA reproduction

Recreate browser-specific behavior in test requests.

Analytics debugging

Check how systems classify device and browser traffic.

API testing

Add realistic headers to request clients during integration tests.

Scraping needs more than a header

Changing a User-Agent is only one part of reliable web extraction. Olostep handles browser rendering, proxies, retries, and extraction formats for production scraping workflows.

Frequently asked questions

Product & Capabilities

A User-Agent is a request header that identifies the browser, device, and operating system making a request.

They are useful for testing, debugging, and simulating browser requests in development tools.

They follow common modern User-Agent formats for popular browsers and platforms.

Usage & Automation

No. A header alone is not enough for reliable scraping or access. Production extraction needs browser and network infrastructure.

Yes. Use it as the value of the User-Agent header.

Yes. The generator supports iPhone, iPad, and Android-style strings.

Pricing & Plans

Yes. It runs in the browser and does not require API usage.

Use Olostep when you need reliable browser-based extraction rather than simple header generation.

Olostep handles request and rendering infrastructure for extraction workflows.