diff --git a/pkg/cmd/extension/command.go b/pkg/cmd/extension/command.go
index 618237637..2c65836c2 100644
--- a/pkg/cmd/extension/command.go
+++ b/pkg/cmd/extension/command.go
@@ -11,6 +11,8 @@ import (
 	"github.com/cli/cli/v2/api"
 	"github.com/cli/cli/v2/git"
 	"github.com/cli/cli/v2/internal/ghrepo"
+	"github.com/cli/cli/v2/internal/tableprinter"
+	"github.com/cli/cli/v2/internal/text"
 	"github.com/cli/cli/v2/pkg/cmd/extension/browse"
 	"github.com/cli/cli/v2/pkg/cmdutil"
 	"github.com/cli/cli/v2/pkg/extensions"
@@ -25,6 +27,7 @@ func NewCmdExtension(f *cmdutil.Factory) *cobra.Command {
 	prompter := f.Prompter
 	config := f.Config
 	browser := f.Browser
+	httpClient := f.HttpClient
 
 	extCmd := cobra.Command{
 		Use:   "extension",
@@ -45,6 +48,186 @@ func NewCmdExtension(f *cmdutil.Factory) *cobra.Command {
 	}
 
 	extCmd.AddCommand(
+		func() *cobra.Command {
+			query := search.Query{
+				Kind: search.KindRepositories,
+			}
+			qualifiers := search.Qualifiers{
+				Topic: []string{"gh-extension"},
+			}
+			var order string
+			var sort string
+			var webMode bool
+			var exporter cmdutil.Exporter
+
+			cmd := &cobra.Command{
+				Use:   "search [<query>]",
+				Short: "Search extensions to the GitHub CLI",
+				Long: heredoc.Doc(`
+					Search for gh extensions.
+
+					With no arguments, this command prints out the first 30 extensions
+					available to install sorted by number of stars. More extensions can
+					be fetched by specifying a higher limit with the --limit flag.
+
+					When connected to a terminal, this command prints out three columns.
+					The first has a ✓ if the extension is already installed locally. The
+					second is the full name of the extension repository in NAME/OWNER
+					format. The third is the extension's description.
+
+					When not connected to a terminal, the ✓ character is rendered as the
+					word "installed" but otherwise the order and content of the columns
+					is the same.
+
+					This command behaves similarly to 'gh search repos' but does not
+					support as many search qualifiers. For a finer grained search of
+					extensions, try using:
+
+						gh search repos --topic "gh-extension"
+
+					and adding qualifiers as needed. See 'gh help search repos' to learn
+					more about repository search.
+
+					For listing just the extensions that are already installed locally,
+					see:
+
+						gh ext list
+				`),
+				Example: heredoc.Doc(`
+					# List the first 30 extensions sorted by star count, descending
+					$ gh ext search
+
+					# List more extensions
+					$ gh ext search --limit 300
+
+					# List extensions matching the term "branch"
+					$ gh ext search branch
+
+					# List extensions owned by organization "github"
+					$ gh ext search --owner github
+
+					# List extensions, sorting by recently updated, ascending
+					$ gh ext search --sort updated --order asc
+
+					# List extensions, filtering by license
+					$ gh ext search --license MIT
+
+					# Open search results in the browser
+					$ gh ext search -w
+				`),
+				RunE: func(cmd *cobra.Command, args []string) error {
+					cfg, err := config()
+					if err != nil {
+						return err
+					}
+					client, err := httpClient()
+					if err != nil {
+						return err
+					}
+
+					if cmd.Flags().Changed("order") {
+						query.Order = order
+					}
+					if cmd.Flags().Changed("sort") {
+						query.Sort = sort
+					}
+
+					query.Keywords = args
+					query.Qualifiers = qualifiers
+
+					host, _ := cfg.DefaultHost()
+					searcher := search.NewSearcher(client, host)
+
+					if webMode {
+						url := searcher.URL(query)
+						if io.IsStdoutTTY() {
+							fmt.Fprintf(io.ErrOut, "Opening %s in your browser.\n", text.DisplayURL(url))
+						}
+						return browser.Browse(url)
+					}
+
+					io.StartProgressIndicator()
+					result, err := searcher.Repositories(query)
+					io.StopProgressIndicator()
+					if err != nil {
+						return err
+					}
+
+					if exporter != nil {
+						return exporter.Write(io, result.Items)
+					}
+
+					if io.IsStdoutTTY() {
+						if len(result.Items) == 0 {
+							return errors.New("no extensions found")
+						}
+						fmt.Fprintf(io.Out, "Showing %d of %d extensions\n", len(result.Items), result.Total)
+						fmt.Fprintln(io.Out)
+					}
+
+					cs := io.ColorScheme()
+					installedExts := m.List()
+
+					isInstalled := func(repo search.Repository) bool {
+						searchRepo, err := ghrepo.FromFullName(repo.FullName)
+						if err != nil {
+							return false
+						}
+						for _, e := range installedExts {
+							// TODO consider a Repo() on Extension interface
+							if u, err := git.ParseURL(e.URL()); err == nil {
+								if r, err := ghrepo.FromURL(u); err == nil {
+									if ghrepo.IsSame(searchRepo, r) {
+										return true
+									}
+								}
+							}
+						}
+						return false
+					}
+
+					tp := tableprinter.New(io)
+					tp.HeaderRow("", "REPO", "DESCRIPTION")
+
+					for _, repo := range result.Items {
+						if !strings.HasPrefix(repo.Name, "gh-") {
+							continue
+						}
+
+						installed := ""
+						if isInstalled(repo) {
+							if io.IsStdoutTTY() {
+								installed = "✓"
+							} else {
+								installed = "installed"
+							}
+						}
+
+						tp.AddField(installed, tableprinter.WithColor(cs.Green))
+						tp.AddField(repo.FullName, tableprinter.WithColor(cs.Bold))
+						tp.AddField(repo.Description)
+						tp.EndRow()
+					}
+
+					return tp.Render()
+				},
+			}
+
+			// Output flags
+			cmd.Flags().BoolVarP(&webMode, "web", "w", false, "Open the search query in the web browser")
+			cmdutil.AddJSONFlags(cmd, &exporter, search.RepositoryFields)
+
+			// Query parameter flags
+			cmd.Flags().IntVarP(&query.Limit, "limit", "L", 30, "Maximum number of extensions to fetch")
+			cmdutil.StringEnumFlag(cmd, &order, "order", "", "desc", []string{"asc", "desc"}, "Order of repositories returned, ignored unless '--sort' flag is specified")
+			cmdutil.StringEnumFlag(cmd, &sort, "sort", "", "best-match", []string{"forks", "help-wanted-issues", "stars", "updated"}, "Sort fetched repositories")
+
+			// Qualifier flags
+			cmd.Flags().StringSliceVar(&qualifiers.License, "license", nil, "Filter based on license type")
+			cmd.Flags().StringVar(&qualifiers.User, "owner", "", "Filter on owner")
+
+			return cmd
+		}(),
 		&cobra.Command{
 			Use:     "list",
 			Short:   "List installed extension commands",
diff --git a/pkg/cmd/extension/command_test.go b/pkg/cmd/extension/command_test.go
index 3ef8070b4..d093c764c 100644
--- a/pkg/cmd/extension/command_test.go
+++ b/pkg/cmd/extension/command_test.go
@@ -5,11 +5,13 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"net/url"
 	"os"
 	"strings"
 	"testing"
 
 	"github.com/MakeNowJust/heredoc"
+	"github.com/cli/cli/v2/internal/browser"
 	"github.com/cli/cli/v2/internal/config"
 	"github.com/cli/cli/v2/internal/ghrepo"
 	"github.com/cli/cli/v2/internal/prompter"
@@ -17,6 +19,7 @@ import (
 	"github.com/cli/cli/v2/pkg/extensions"
 	"github.com/cli/cli/v2/pkg/httpmock"
 	"github.com/cli/cli/v2/pkg/iostreams"
+	"github.com/cli/cli/v2/pkg/search"
 	"github.com/spf13/cobra"
 	"github.com/stretchr/testify/assert"
 )
@@ -32,12 +35,193 @@ func TestNewCmdExtension(t *testing.T) {
 		args          []string
 		managerStubs  func(em *extensions.ExtensionManagerMock) func(*testing.T)
 		prompterStubs func(pm *prompter.PrompterMock)
+		httpStubs     func(reg *httpmock.Registry)
+		browseStubs   func(*browser.Stub) func(*testing.T)
 		isTTY         bool
 		wantErr       bool
 		errMsg        string
 		wantStdout    string
 		wantStderr    string
 	}{
+		{
+			name: "search for extensions",
+			args: []string{"search"},
+			managerStubs: func(em *extensions.ExtensionManagerMock) func(*testing.T) {
+				em.ListFunc = func() []extensions.Extension {
+					return []extensions.Extension{
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/vilmibm/gh-screensaver"
+							},
+						},
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/github/gh-gei"
+							},
+						},
+					}
+				}
+				return func(t *testing.T) {
+					listCalls := em.ListCalls()
+					assert.Equal(t, 1, len(listCalls))
+				}
+			},
+			httpStubs: func(reg *httpmock.Registry) {
+				values := url.Values{
+					"page":     []string{"1"},
+					"per_page": []string{"30"},
+					"q":        []string{"topic:gh-extension"},
+				}
+				reg.Register(
+					httpmock.QueryMatcher("GET", "search/repositories", values),
+					httpmock.JSONResponse(searchResults()),
+				)
+			},
+			isTTY:      true,
+			wantStdout: "Showing 4 of 4 extensions\n\n   REPO                    DESCRIPTION\n✓  vilmibm/gh-screensaver  terminal animations\n   cli/gh-cool             it's just cool ok\n   samcoe/gh-triage        helps with triage\n✓  github/gh-gei           something something enterprise\n",
+		},
+		{
+			name: "search for extensions non-tty",
+			args: []string{"search"},
+			managerStubs: func(em *extensions.ExtensionManagerMock) func(*testing.T) {
+				em.ListFunc = func() []extensions.Extension {
+					return []extensions.Extension{
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/vilmibm/gh-screensaver"
+							},
+						},
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/github/gh-gei"
+							},
+						},
+					}
+				}
+				return func(t *testing.T) {
+					listCalls := em.ListCalls()
+					assert.Equal(t, 1, len(listCalls))
+				}
+			},
+			httpStubs: func(reg *httpmock.Registry) {
+				values := url.Values{
+					"page":     []string{"1"},
+					"per_page": []string{"30"},
+					"q":        []string{"topic:gh-extension"},
+				}
+				reg.Register(
+					httpmock.QueryMatcher("GET", "search/repositories", values),
+					httpmock.JSONResponse(searchResults()),
+				)
+			},
+			wantStdout: "installed\tvilmibm/gh-screensaver\tterminal animations\n\tcli/gh-cool\tit's just cool ok\n\tsamcoe/gh-triage\thelps with triage\ninstalled\tgithub/gh-gei\tsomething something enterprise\n",
+		},
+		{
+			name: "search for extensions with keywords",
+			args: []string{"search", "screen"},
+			managerStubs: func(em *extensions.ExtensionManagerMock) func(*testing.T) {
+				em.ListFunc = func() []extensions.Extension {
+					return []extensions.Extension{
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/vilmibm/gh-screensaver"
+							},
+						},
+						&extensions.ExtensionMock{
+							URLFunc: func() string {
+								return "https://github.com/github/gh-gei"
+							},
+						},
+					}
+				}
+				return func(t *testing.T) {
+					listCalls := em.ListCalls()
+					assert.Equal(t, 1, len(listCalls))
+				}
+			},
+			httpStubs: func(reg *httpmock.Registry) {
+				values := url.Values{
+					"page":     []string{"1"},
+					"per_page": []string{"30"},
+					"q":        []string{"screen topic:gh-extension"},
+				}
+				results := searchResults()
+				results.Total = 1
+				results.Items = []search.Repository{results.Items[0]}
+				reg.Register(
+					httpmock.QueryMatcher("GET", "search/repositories", values),
+					httpmock.JSONResponse(results),
+				)
+			},
+			wantStdout: "installed\tvilmibm/gh-screensaver\tterminal animations\n",
+		},
+		{
+			name: "search for extensions with parameter flags",
+			args: []string{"search", "--limit", "1", "--order", "asc", "--sort", "stars"},
+			managerStubs: func(em *extensions.ExtensionManagerMock) func(*testing.T) {
+				em.ListFunc = func() []extensions.Extension {
+					return []extensions.Extension{}
+				}
+				return func(t *testing.T) {
+					listCalls := em.ListCalls()
+					assert.Equal(t, 1, len(listCalls))
+				}
+			},
+			httpStubs: func(reg *httpmock.Registry) {
+				values := url.Values{
+					"page":     []string{"1"},
+					"order":    []string{"asc"},
+					"sort":     []string{"stars"},
+					"per_page": []string{"1"},
+					"q":        []string{"topic:gh-extension"},
+				}
+				results := searchResults()
+				results.Total = 1
+				results.Items = []search.Repository{results.Items[0]}
+				reg.Register(
+					httpmock.QueryMatcher("GET", "search/repositories", values),
+					httpmock.JSONResponse(results),
+				)
+			},
+			wantStdout: "\tvilmibm/gh-screensaver\tterminal animations\n",
+		},
+		{
+			name: "search for extensions with qualifier flags",
+			args: []string{"search", "--license", "GPLv3", "--owner", "jillvalentine"},
+			managerStubs: func(em *extensions.ExtensionManagerMock) func(*testing.T) {
+				em.ListFunc = func() []extensions.Extension {
+					return []extensions.Extension{}
+				}
+				return func(t *testing.T) {
+					listCalls := em.ListCalls()
+					assert.Equal(t, 1, len(listCalls))
+				}
+			},
+			httpStubs: func(reg *httpmock.Registry) {
+				values := url.Values{
+					"page":     []string{"1"},
+					"per_page": []string{"30"},
+					"q":        []string{"license:GPLv3 topic:gh-extension user:jillvalentine"},
+				}
+				results := searchResults()
+				results.Total = 1
+				results.Items = []search.Repository{results.Items[0]}
+				reg.Register(
+					httpmock.QueryMatcher("GET", "search/repositories", values),
+					httpmock.JSONResponse(results),
+				)
+			},
+			wantStdout: "\tvilmibm/gh-screensaver\tterminal animations\n",
+		},
+		{
+			name: "search for extensions with web mode",
+			args: []string{"search", "--web"},
+			browseStubs: func(b *browser.Stub) func(*testing.T) {
+				return func(t *testing.T) {
+					b.Verify(t, "https://github.com/search?q=topic%3Agh-extension&type=repositories")
+				}
+			},
+		},
 		{
 			name: "install an extension",
 			args: []string{"install", "owner/gh-some-ext"},
@@ -601,6 +785,16 @@ func TestNewCmdExtension(t *testing.T) {
 			defer reg.Verify(t)
 			client := http.Client{Transport: &reg}
 
+			if tt.httpStubs != nil {
+				tt.httpStubs(&reg)
+			}
+
+			var assertBrowserFunc func(*testing.T)
+			browseStub := &browser.Stub{}
+			if tt.browseStubs != nil {
+				assertBrowserFunc = tt.browseStubs(browseStub)
+			}
+
 			f := cmdutil.Factory{
 				Config: func() (config.Config, error) {
 					return config.NewBlankConfig(), nil
@@ -608,6 +802,7 @@ func TestNewCmdExtension(t *testing.T) {
 				IOStreams:        ios,
 				ExtensionManager: em,
 				Prompter:         pm,
+				Browser:          browseStub,
 				HttpClient: func() (*http.Client, error) {
 					return &client, nil
 				},
@@ -629,6 +824,10 @@ func TestNewCmdExtension(t *testing.T) {
 				assertFunc(t)
 			}
 
+			if assertBrowserFunc != nil {
+				assertBrowserFunc(t)
+			}
+
 			assert.Equal(t, tt.wantStdout, stdout.String())
 			assert.Equal(t, tt.wantStderr, stderr.String())
 		})
@@ -714,3 +913,44 @@ func Test_checkValidExtension(t *testing.T) {
 		})
 	}
 }
+
+func searchResults() search.RepositoriesResult {
+	return search.RepositoriesResult{
+		IncompleteResults: false,
+		Items: []search.Repository{
+			{
+				FullName:    "vilmibm/gh-screensaver",
+				Name:        "gh-screensaver",
+				Description: "terminal animations",
+				Owner: search.User{
+					Login: "vilmibm",
+				},
+			},
+			{
+				FullName:    "cli/gh-cool",
+				Name:        "gh-cool",
+				Description: "it's just cool ok",
+				Owner: search.User{
+					Login: "cli",
+				},
+			},
+			{
+				FullName:    "samcoe/gh-triage",
+				Name:        "gh-triage",
+				Description: "helps with triage",
+				Owner: search.User{
+					Login: "samcoe",
+				},
+			},
+			{
+				FullName:    "github/gh-gei",
+				Name:        "gh-gei",
+				Description: "something something enterprise",
+				Owner: search.User{
+					Login: "github",
+				},
+			},
+		},
+		Total: 4,
+	}
+}