> ## Documentation Index
> Fetch the complete documentation index at: https://cloudinary.com/documentation/llms.txt
> Use this file to discover all available pages before exploring further.

# Go sample projects


We've created some sample projects to get you started with integrating Cloudinary into your Go applications.
> **TIP**: Check out our collection of [Go code explorers](code_explorers) too!

## Image transformations

The [Image transformations](https://github.com/cloudinary-devs/go-sdk-quickstart-image-examples) app showcases popular on-the-fly image transformations using the Go SDK, including special effects, resizing, subject-aware cropping with gravity parameters, optimization, and overlays.

Here's what you'll see in the Image transformations app:

Here's an excerpt from the code featuring the `Overlays` and `Resize_crop` functions from files in the custom `lib` package:

overlays_ex.go

```go
package lib

import(
    "fmt"
    "github.com/cloudinary/cloudinary-go"
)

func Overlays(cld *cloudinary.Cloudinary) string {
    img_coffee, err := cld.Image("docs/sdk/go/coffee_cup")
    if err != nil {
        fmt.Println("error")
    }

    // Add the transformation
    img_coffee.Transformation = "w_400,h_250,c_fill,g_south/l_nice_couple,w_1.3,h_1.3,g_faces,c_crop,fl_region_relative/e_saturation:50/e_vignette/fl_layer_apply,w_100,r_max,g_center,y_20,x_-20/l_balloon,h_55/e_hue:-20,a_5/fl_layer_apply,x_30,y_5/l_text:Cookie_40_bold:Love,co_rgb:f08/a_20,fl_layer_apply,x_-45,y_44/c_crop,w_300,h_250,x_30/r_60"

    // Generate and print the delivery URL
    url, err := img_coffee.String()
    fmt.Println(url)
    if err != nil {
        fmt.Println("error")
    }
    return url
}
```

resize_crop_ex.go

```go
package lib

import(
    "fmt"
    "github.com/cloudinary/cloudinary-go"
)

func Resize_crop(cld *cloudinary.Cloudinary) string {
    // Instantiate an object that stores information for asset with public ID "black_coat_portrait"
    img_fam, err := cld.Image("docs/sdk/go/family_video")
    if err != nil {
        fmt.Println("error")
    }

    // Add the transformation
    img_fam.Transformation = "w_350,h_350,c_fill,g_faces"

    // Generate and print the delivery URL
    url, err := img_fam.String()
    fmt.Println(url)
    if err != nil {
        fmt.Println("error")
    }
    return url
}
```

> **See the full code**:
>
> * [Explore the Go Image transformations app on GitHub](https://github.com/cloudinary-devs/go-sdk-quickstart-image-examples).

## Video transformations

The [Video transformations](https://github.com/cloudinary-devs/go-sdk-quickstart-video-examples) app showcases popular on-the-fly video transformations using the Go SDK, including resizing, cropping, concatenation, trimming, overlays, and special effects.

Here's what you'll see in the Video transformations app:

Here's an excerpt from the code featuring the `Overlay` and `Concat` functions from files in the custom `lib` package:

overlay_ex.go

```go
package lib

import(
    "fmt"
    "github.com/cloudinary/cloudinary-go"
)

    func Overlay(cld *cloudinary.Cloudinary) string {
      // Instantiate an object for the video with public ID "exercise1" in folder "docs/sdk/go"
      v_exercise, err := cld.Video("docs/sdk/go/exercise1")
      if err != nil {
          fmt.Println("error")
      }

      // Add the transformation
      v_exercise.Transformation = "c_scale,w_300/l_video:exercise2/c_fit,w_80/bo_2px_solid_blue/fl_layer_apply,g_north_east,so_2.0"

      // Generate and print the delivery URL
      myURL, err := v_exercise.String()
      if err != nil {
          fmt.Println("error")
      }
      fmt.Println(myURL)

      // Output: https://res.cloudinary.com/demo/video/upload/c_scale,w_300/l_video:exercise2/c_fit,w_80/bo_2px_solid_blue/fl_layer_apply,g_north_east,so_2.0/v1/docs/sdk/go/exercise1  
    return myURL
}
```

concat_ex.go

```go
package lib

import(
    "fmt"
    "github.com/cloudinary/cloudinary-go"
)

func Concat(cld *cloudinary.Cloudinary) string {
    // Instantiate an object that stores information for asset with public ID "horse_race" in folder "docs/sdk/go"
    v_races, err := cld.Video("docs/sdk/go/horse_race")
    if err != nil {
        fmt.Println("error")
    }

    // Add the transformation
    v_races.Transformation = "c_fill,h_300,w_450/du_5/fl_splice,l_video:swimming_race/c_fill,h_300,w_450/du_5/fl_layer_apply"

    // Generate and print the delivery URL
    myURL, err := v_races.String()
    fmt.Println(myURL)
    if err != nil {
        fmt.Println("error")
    }
    return myURL
}
```

> **See the full code**:
>
> * [Explore the Go Video transformations app on GitHub](https://github.com/cloudinary-devs/go-sdk-quickstart-video-examples).