A powerful Go HTTP client library that provides advanced TLS fingerprinting capabilities, allowing you to emulate various browsers and devices for web scraping, testing, and automation tasks.
- 🌐 Browser Emulation: Mimic TLS fingerprints of Chrome, Safari, OkHttp4, and HttpUrlConnection
- 🚀 HTTP Protocol Support: HTTP/1.1, HTTP/2, and HTTP/3
- 🗜️ Automatic Decompression: Built-in support for gzip, brotli, zstd, and deflate
- 🪝 Hooks: Pre-request and post-request hooks for request/response manipulation
- 📊 Bandwidth Tracking: Monitor network usage and performance
- 🎯 Certificate Pinning: Enhanced security with certificate validation
- 🌍 Proxy Support: HTTP, HTTPS, and SOCKS proxy support
- ⚡ High Performance: Optimized for speed and efficiency
go get github.com/nukilabs/tlsclientpackage main
import (
"fmt"
"io"
"log"
"net/url"
"github.com/nukilabs/http"
"github.com/nukilabs/tlsclient"
"github.com/nukilabs/tlsclient/profiles"
)
func main() {
// Create a new client with Chrome profile
client := tlsclient.New(profiles.Chrome138)
client.SetProxy(&url.URL{
Scheme: "http",
Host: "localhost:8888",
})
// Make a GET request
req, err := client.NewRequest(http.MethodGet, "https://example.com", nil)
if err != nil {
log.Fatal(err)
}
// Add chrome-like headers
req.Header = http.Header{
"sec-ch-ua": {"\"Not)A;Brand\";v=\"8\", \"Chromium\";v=\"138\", \"Google Chrome\";v=\"138\""},
"sec-ch-ua-mobile": {"?0"},
"sec-ch-ua-platform": {"\"Windows\""},
"upgrade-insecure-requests": {"1"},
"user-agent": {"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36"},
"accept": {"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7"},
"sec-fetch-site": {"none"},
"sec-fetch-mode": {"navigate"},
"sec-fetch-user": {"?1"},
"sec-fetch-dest": {"document"},
"accept-encoding": {"gzip, deflate, br, zstd"},
"accept-language": {"de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7"},
"priority": {"u=0, i"},
http.HeaderOrderKey: {"sec-ch-ua", "sec-ch-ua-mobile", "sec-ch-ua-platform", "upgrade-insecure-requests", "user-agent", "accept", "sec-fetch-site", "sec-fetch-mode", "sec-fetch-user", "sec-fetch-dest", "accept-encoding", "accept-language", "priority"},
}
// Perform the request
res, err := client.Do(req)
if err != nil {
log.Fatal(err)
}
// Read and print the response
body, err := io.ReadAll(res.Body)
if err != nil {
log.Fatal(err)
}
fmt.Println(string(body))
}// Chrome versions 120-138
client := tlsclient.New(profiles.Chrome138) // Latest Chrome
client := tlsclient.New(profiles.Chrome120) // Older Chrome version// Safari 17
client := tlsclient.New(profiles.Safari17)// Android API levels 21-35
client := tlsclient.New(profiles.HttpUrlConnectionAndroid(33)) // Android 13
client := tlsclient.New(profiles.HttpUrlConnectionAndroid(21)) // Android 5.0// Android API levels 21-35
client := tlsclient.New(profiles.Okhttp4Android(33)) // Android 13
client := tlsclient.New(profiles.Okhttp4Android(29)) // Android 10client := tlsclient.New(profiles.Chrome138,
tlsclient.WithTimeout(30*time.Second), // Set request timeout
tlsclient.WithNoCookieJar(), // Disable cookie jar
tlsclient.WithNoAutoDecompress(), // Disable automatic decompression
tlsclient.WithNoFollowRedirects(), // Disable automatic redirects
)client := tlsclient.New(profiles.Chrome138,
tlsclient.WithTransportOptions(tlsclient.TransportOptions{
ServerNameOverride: "example.com",
InsecureSkipVerify: true,
DisableKeepAlives: false,
IdleConnTimeout: 90 * time.Second,
DisableIPV4: false,
DisableIPV6: false,
}),
)client := tlsclient.New(profiles.Chrome138,
tlsclient.WithAutoPinning(),
)client.SetFollowRedirects(false)client.SetRedirectFunc(func(req *http.Request, via []*http.Request) error {
// Maximum of 5 redirects
if len(via) >= 5 {
return errors.New("too many redirects")
}
// Don't follow redirects to different hosts
if req.URL.Host != via[0].URL.Host {
return errors.New("cross-host redirect not allowed")
}
return nil
})// HTTP Proxy
client.SetProxy(&url.URL{
Scheme: "http",
Host: "proxy.example.com:8080",
})
// SOCKS5 Proxy
client.SetProxy(&url.URL{
Scheme: "socks5",
Host: "proxy.example.com:1080",
})
// Authenticated Proxy
client.SetProxy(&url.URL{
Scheme: "http",
Host: "proxy.example.com:8080",
User: url.UserPassword("username", "password"),
})Pre-hooks run before each request and can modify the request before it is sent.
func AddAuthHeader(client *tlsclient.Client, req *http.Request) (*http.Request, error) {
req.Header.Set("Authorization", "Bearer my-token")
return req, nil
}
client.AddPreHooks(AddAuthHeader)Post-hooks run after each request and can inspect or modify the response.
func GotBlockedHook(client *tlsclient.Client, req *http.Request, res *http.Response) (*http.Response, error) {
if res.StatusCode == http.StatusTooManyRequests {
// Switch to a different proxy if blocked
client.SetProxy(&url.URL{
Scheme: "http",
Host: "localhost:8889",
})
}
return res, nil
}
client.AddPostHooks(GotBlockedHook)// Set hooks (replaces any existing hooks)
client.SetPreHooks(hook1, hook2)
client.SetPostHooks(hook1, hook2)
// Add hooks (appends to existing hooks)
client.AddPreHooks(hook3)
client.AddPostHooks(hook3)
// Delete all hooks
client.DeletePreHooks()
client.DeletePostHooks()// Reuse the same client for multiple requests
client := tlsclient.New(profiles.Chrome138)
// Make multiple requests with the same client
for _, url := range urls {
res, err := client.Get(url)
if err != nil {
continue
}
// Process response...
res.Body.Close()
}res, err := client.Get("https://example.com")
if err != nil {
return err
}
defer res.Body.Close() // Always close response body
// Read response body
body, err := io.ReadAll(res.Body)
if err != nil {
return err
}We welcome contributions from the community! This TLS Client is constantly evolving, and we'd love your help in making it even better. Here are some ways you can contribute:
We're always looking to expand our browser and device emulation capabilities. If you have access to a browser, device, or HTTP client that isn't currently supported, we'd love to add it!
How to contribute a new TLS profile:
-
Capture the TLS fingerprint using tools like:
- Powhttp HTTP Proxy App
- Peets TLS fingerprinting API
- Network analysis tools (Wireshark, etc.)
-
Create the profile by adding it to the appropriate file in
/profiles/:// profiles/newbrowser.go var NewBrowser = ClientProfile{ ClientHelloSpec: func() *tls.ClientHelloSpec { return &tls.ClientHelloSpec{ CipherSuites: []uint16{ // Your cipher suites here }, Extensions: []tls.TLSExtension{ // Your extensions here }, // ... other TLS parameters } }, Settings: []http2.Setting{ // HTTP/2 settings }, // ... other profile parameters }
-
Add tests in
/tests/to verify the profile works correctly -
Update documentation to include the new profile in the README
Browsers/Clients we'd love to see:
- Firefox (all versions)
- Edge (Chromium-based)
- Opera
- Brave
- Mobile browsers (iOS Safari, Chrome Mobile, Samsung Internet)
- HTTP clients (curl, wget, Python requests, etc.)
We appreciate all contributions, no matter how small! 🙏
- Uses nukilabs/utls for TLS fingerprinting
- Uses nukilabs/http for custom HTTP1.1 and HTTP/2 support
- Uses nukilabs/quic-qo for HTTP/3 support
- Inspired by:
© 2025 nukilabs