htmlcapture is a Go package that captures high-quality screenshots from URLs, HTML files, or raw HTML strings. It is optimized for Instagram post sizes and supports dynamic HTML rendering.
To install htmlcapture, use:
go get github.com/rohankarn35/htmlcapture@latest- ✅ Capture from URL, HTML file, or raw HTML string
- ✅ Supports dynamic HTML rendering with external variables
- ✅ Capture specific elements using CSS selectors
- ✅ Default Instagram-optimized screenshot sizes
- ✅ Uses headless Chrome (chromedp) for rendering
package main
import (
"fmt"
"os"
"github.com/rohankarn35/htmlcapture"
)
func main() {
opts := htmlcapture.CaptureOptions{
Input: `<html><body><h1>Hello, World!</h1></body></html>`,
}
img, err := htmlcapture.Capture(opts)
if err != nil {
fmt.Println("Error:", err)
return
}
os.WriteFile("screenshot.png", img, 0644)
}Example: template.html
<html>
<body>
<h1>Welcome {{.User}}, to {{.Website}}!</h1>
</body>
</html>Go Code:
package main
import (
"github.com/rohankarn35/htmlcapture"
)
func main() {
opts := htmlcapture.CaptureOptions{
Input: "template.html",
Variables: map[string]string{
"User": "Alice",
"Website": "Wonderland",
},
}
img, err := htmlcapture.Capture(opts)
if err != nil {
log.Fatalf("Error capturing screenshot: %v", err)
}
os.WriteFile("screenshot.png", img, 0644)
}package main
import (
"github.com/rohankarn35/htmlcapture"
)
func main() {
opts := htmlcapture.CaptureOptions{
Input: "https://example.com",
ViewportW: 1920,
ViewportH: 1080,
}
img, err := htmlcapture.Capture(opts)
if err != nil {
log.Fatalf("Error capturing screenshot: %v", err)
}
os.WriteFile("screenshot.png", img, 0644)
}package main
import (
"github.com/rohankarn35/htmlcapture"
)
func main() {
opts := htmlcapture.CaptureOptions{
Input: "https://example.com",
Selector: "#main-content",
}
img, err := htmlcapture.Capture(opts)
if err != nil {
log.Fatalf("Error capturing screenshot: %v", err)
}
os.WriteFile("screenshot.png", img, 0644)
}| Option | Type | Default | Description |
|---|---|---|---|
Input |
string | Required | URL, HTML string, or file path |
ViewportW |
int | 1080 | Viewport width |
ViewportH |
int | 1350 | Viewport height |
Selector |
string | "" | CSS selector for capturing a specific element |
Variables |
map[string]string | {} |
Key-value pairs for dynamic HTML |
MIT License
- ✅ Add PDF output support 📄
- ✅ Improve performance optimizations 🚀
- ✅ Additional image quality controls 🎨
Contributions are welcome! Feel free to open issues or submit pull requests. 😃