diff --git a/src/platforms/Gitea/API.ts b/src/platforms/Gitea/API.ts
new file mode 100644
index 0000000..2a7a849
--- /dev/null
+++ b/src/platforms/Gitea/API.ts
@@ -0,0 +1,107 @@
+import { raiseError } from 'analytics'
+import { errors } from 'platforms'
+
+function isEmptyProject(content: any /* safe any */) {
+  return content?.['message'] === 'Git Repository is empty.'
+}
+
+function isBlockedProject(content: any /* safe any */) {
+  return content?.['message'] === 'Repository access blocked'
+}
+
+async function request(
+  url: string,
+  {
+    accessToken,
+  }: {
+    accessToken?: string
+  } = {},
+) {
+  const headers = {} as HeadersInit & {
+    Authorization?: string
+  }
+  if (accessToken) {
+    headers.Authorization = `token ${accessToken}`
+  }
+
+  let res: Response
+  try {
+    res = await fetch(url, { headers })
+  } catch (err) {
+    throw new Error(errors.CONNECTION_BLOCKED)
+  }
+
+  const contentType = res.headers.get('Content-Type') || res.headers.get('content-type')
+  if (!contentType) {
+    throw new Error(`Response has no content type`)
+  } else if (!contentType.includes('application/json')) {
+    throw new Error(`Response content type is ${contentType}`)
+  }
+
+  // About res.ok:
+  // True if res.status between 200~299
+  // Ref: https://developer.mozilla.org/en-US/docs/Web/API/Response/ok
+  if (res.ok) {
+    return res.json()
+  } else {
+    if (res.status === 404 || res.status === 401) throw new Error(errors.NOT_FOUND)
+    else if (res.status === 500) throw new Error(errors.SERVER_FAULT)
+    else {
+      const content = await res.json()
+      if (isEmptyProject(content)) throw new Error(errors.EMPTY_PROJECT)
+      if (isBlockedProject(content)) throw new Error(errors.BLOCKED_PROJECT)
+      // Unknown type of error, report it!
+      raiseError(new Error(res.statusText))
+      throw new Error(content && content.message)
+    }
+  }
+}
+
+export const API_ENDPOINT = `${window.location.host}/api/v1`
+
+export async function getRepoMeta(
+  userName: string,
+  repoName: string,
+  accessToken?: string,
+): Promise<GiteaAPI.MetaData> {
+  const url = `https://${API_ENDPOINT}/repos/${userName}/${repoName}`
+  return await request(url, { accessToken })
+}
+
+export async function getTreeData(
+  userName: string,
+  repoName: string,
+  branchName: string,
+  recursive?: boolean,
+  accessToken?: string,
+): Promise<GiteaAPI.TreeData> {
+  const search = new URLSearchParams()
+  if (recursive) search.set('recursive', '1')
+  const url =
+    `https://${API_ENDPOINT}/repos/${userName}/${repoName}/git/trees/${branchName}?` + search
+  return await request(url, { accessToken })
+}
+
+export async function getBlobData(
+  userName: string,
+  repoName: string,
+  sha: string,
+  accessToken?: string,
+): Promise<GitHubAPI.BlobData> {
+  const url = `https://${API_ENDPOINT}/repos/${userName}/${repoName}/git/blobs/${sha}`
+  return await request(url, { accessToken })
+}
+
+export async function OAuth(code: string): Promise<string | null> {
+  const endpoint = `https://gitako.now.sh/oauth/gitea?`
+    const res = await fetch(endpoint + new URLSearchParams({ code }).toString(), {
+      method: 'post',
+    })
+  
+    if (res.ok) {
+      const body = await res.json()
+      const accessToken = body?.accessToken
+      if (typeof accessToken === 'string') return accessToken
+    }
+    return null
+}
diff --git a/src/platforms/Gitea/DOMHelper.ts b/src/platforms/Gitea/DOMHelper.ts
new file mode 100644
index 0000000..05d35c4
--- /dev/null
+++ b/src/platforms/Gitea/DOMHelper.ts
@@ -0,0 +1,24 @@
+import { raiseError } from 'analytics'
+import { $ } from 'utils/DOMHelper'
+
+export function isInRepoPage() {
+  const repoHeaderSelector = '.repo-header'
+  return Boolean($(repoHeaderSelector))
+}
+
+export function isInCodePage() {
+  const branchListSelector = '.reference'
+  return Boolean($(branchListSelector))
+}
+
+export function getCurrentBranch() {
+  const branchListSelector = '.reference'
+  const branchButtonElement: HTMLElement = $(branchListSelector)
+  const branchNameElement = branchButtonElement.querySelector('.selected')
+  if (branchNameElement) {
+    return branchNameElement.textContent;
+  }
+
+  raiseError(new Error('cannot get current branch'))
+}
+
diff --git a/src/platforms/Gitea/Request.d.ts b/src/platforms/Gitea/Request.d.ts
new file mode 100644
index 0000000..1132de1
--- /dev/null
+++ b/src/platforms/Gitea/Request.d.ts
@@ -0,0 +1,42 @@
+declare namespace GiteaAPI {
+  type TreeItem = {
+    path: string
+    mode: string
+    sha: string
+    size: number
+    url: string
+    type: 'blob' | 'commit' | 'tree'
+  }
+
+  type TreeData = {
+    sha: string
+    truncated: boolean
+    tree: TreeItem[]
+    url: string
+  }
+
+  type MetaData = {
+    name: string
+    default_branch: string
+    html_url: string
+    owner: {
+      login: string
+      html_url: string
+    }
+  }
+
+  type BlobData = {
+    encoding: 'base64' | string
+    sha: string
+    content?: string
+    size: number
+    url: string
+  }
+
+  type OAuth = {
+    access_token?: string
+    scope?: string
+    token_type?: string
+    error_description?: string
+  }
+}
diff --git a/src/platforms/Gitea/URLHelper.ts b/src/platforms/Gitea/URLHelper.ts
new file mode 100644
index 0000000..a68b81f
--- /dev/null
+++ b/src/platforms/Gitea/URLHelper.ts
@@ -0,0 +1,70 @@
+import { raiseError } from 'analytics'
+
+export function parse(): Partial<MetaData> & { path: string[] } {
+  const { pathname } = window.location
+  let [
+    ,
+    // ignore content before the first '/'
+    userName,
+    repoName,
+    type,
+    ...path // should be [...branchName.split('/'), ...filePath.split('/')]
+  ] = unescape(decodeURIComponent(pathname)).split('/')
+  return {
+    userName,
+    repoName,
+    branchName: undefined,
+    type,
+    path,
+  }
+}
+
+export function parseSHA() {
+  const { type, path } = parse()
+  return type === 'blob' || type === 'tree' ? path[0] : undefined
+}
+
+function isCommitPath(path: string[]) {
+  return isCompleteCommitSHA(path[0])
+}
+
+function isCompleteCommitSHA(sha?: string) {
+  return typeof sha === 'string' && /^[abcdef0-9]{40}$/i.test(sha)
+}
+
+export function getCurrentPath(branchName = '') {
+  const { path, type } = parse()
+  if (type === 'blob' || type === 'tree') {
+    if (isCommitPath(path)) {
+      // path = commit-SHA/path/to/item
+      path.shift()
+    } else {
+      // path = branch/name/path/to/item or HEAD/path/to/item
+      // HEAD is not a valid branch name. Getting HEAD means being detached.
+      if (path[0] === 'HEAD') path.shift()
+      else {
+        const splitBranchName = branchName.split('/')
+        while (splitBranchName.length) {
+          if (
+            splitBranchName[0] === path[0] ||
+            // Keep consuming as their heads are same
+            (splitBranchName.length === 1 && splitBranchName[0].startsWith(path[0]))
+            // This happens when visiting URLs like /blob/{commitSHA}/path/to/file
+            // and {commitSHA} is shorter than we got from DOM
+          ) {
+            splitBranchName.shift()
+            path.shift()
+          } else {
+            raiseError(new Error(`branch name and path prefix not match`), {
+              branchName,
+              path: parse().path,
+            })
+            return []
+          }
+        }
+      }
+    }
+    return path.map(decodeURIComponent)
+  }
+  return []
+}
\ No newline at end of file
diff --git a/src/platforms/Gitea/index.ts b/src/platforms/Gitea/index.ts
new file mode 100644
index 0000000..44ce601
--- /dev/null
+++ b/src/platforms/Gitea/index.ts
@@ -0,0 +1,160 @@
+import { platform } from 'platforms'
+import { resolveGitModules } from 'utils/gitSubmodule'
+import { sortFoldersToFront } from 'utils/treeParser'
+import * as API from './API'
+import * as DOMHelper from './DOMHelper'
+import * as URLHelper from './URLHelper'
+
+function processTree(tree: TreeNode[]): TreeNode {
+  // nodes are created from items and put onto tree
+  const pathToItem = new Map<string, TreeNode>()
+  tree.forEach(item => pathToItem.set(item.path, item))
+
+  const pathToCreated = new Map<string, TreeNode>()
+  const root: TreeNode = { name: '', path: '', contents: [], type: 'tree' }
+  pathToCreated.set('', root)
+  tree.forEach(item => {
+    // bottom-up search for the deepest node created
+    let path = item.path
+    const itemsToCreateTreeNode: TreeNode[] = []
+    while (path !== '' && !pathToCreated.has(path)) {
+      const item = pathToItem.get(path)
+      if (item) {
+        itemsToCreateTreeNode.push(item)
+      } else {
+        const $item: TreeNode = {
+          name: path.split('/').pop() || '',
+          path,
+          type: 'tree',
+          contents: [],
+        }
+        pathToItem.set(path, $item)
+        itemsToCreateTreeNode.push($item)
+      }
+      // 'a/b' -> 'a'
+      // 'a' -> ''
+      path = path.substring(0, path.lastIndexOf('/'))
+    }
+
+    // top-down create nodes
+    while (itemsToCreateTreeNode.length) {
+      const item = itemsToCreateTreeNode.pop()
+      if (!item) continue
+      const node: TreeNode = item
+      const parentNode = pathToCreated.get(path)
+      if (parentNode) {
+        if (!parentNode.contents) parentNode.contents = []
+        parentNode.contents.push(node)
+      }
+      pathToCreated.set(node.path, node)
+      path = node.path
+    }
+  })
+
+  sortFoldersToFront(root)
+
+  return root
+}
+
+function getUrlForRedirect(
+  userName: string,
+  repoName: string,
+  branchName: string,
+  type = 'blob',
+  path = '',
+) {
+  // Modern browsers have great support for handling unsafe URL,
+  // It may be possible to sanitize path with
+  // `path => path.includes('#') ? path.replace(/#/g, '%23') : '...'
+  return `https://${
+    window.location.host
+  }/${userName}/${repoName}/${type}/${branchName}/${path
+    .split('/')
+    .map(encodeURIComponent)
+    .join('/')}`
+}
+
+export const Gitea: Platform = {
+  isEnterprise() {
+    return false;
+  },
+  resolveMeta() {
+    if (!DOMHelper.isInRepoPage()) {
+      return null
+    }
+
+    let detectedBranchName
+    if (DOMHelper.isInCodePage()) {
+      detectedBranchName = DOMHelper.getCurrentBranch() || URLHelper.parseSHA()
+    }
+
+    const metaData = {
+      ...URLHelper.parse(),
+      branchName: detectedBranchName,
+    } as MetaData
+    return metaData
+  },
+  async getMetaData(partialMetaData, accessToken) {
+    const { userName, repoName } = partialMetaData
+    const data = await API.getRepoMeta(userName, repoName, accessToken)
+    return {
+      userUrl: data?.owner?.html_url,
+      repoUrl: data?.html_url,
+      defaultBranchName: data.default_branch,
+    }
+  },
+  async getTreeData(metaData, path, recursive, accessToken) {
+    const { userName, repoName, branchName } = metaData
+    const treeData = await API.getTreeData(userName, repoName, branchName)
+
+    const root = processTree(
+      treeData.tree.map(item => ({
+        path: item.path || '',
+        type: item.type || 'blob',
+        name: item.path?.replace(/^.*\//, '') || '',
+        url:
+          item.url && item.type && item.path
+            ? getUrlForRedirect(
+                metaData.userName,
+                metaData.repoName,
+                metaData.branchName,
+                item.type,
+                item.path,
+              )
+            : undefined,
+        contents: item.type === 'tree' ? [] : undefined,
+        sha: item.sha,
+      })),
+    )
+
+    const gitModules = root.contents?.find(item => item.name === '.gitmodules')
+    if (gitModules) {
+      if (metaData.userName && metaData.repoName && gitModules.sha) {
+        const blobData = await API.getBlobData(
+          metaData.repoName,
+          metaData.userName,
+          gitModules.sha,
+          accessToken,
+        )
+
+        if (blobData && blobData.encoding === 'base64' && blobData.content) {
+          await resolveGitModules(root, Base64.decode(blobData.content))
+        }
+      }
+    }
+
+    return { root }
+  },
+  shouldShow() {
+    return DOMHelper.isInCodePage()
+  },
+  getCurrentPath(branchName) {
+    return URLHelper.getCurrentPath(branchName)
+  },
+  setOAuth(code) {
+    return API.OAuth(code)
+  },
+  getOAuthLink() {
+    return `https://${window.location.host}/api/v1/user/applications/oauth2`
+  },
+}
\ No newline at end of file
diff --git a/src/platforms/index.ts b/src/platforms/index.ts
index bdb82e5..4e713a4 100644
--- a/src/platforms/index.ts
+++ b/src/platforms/index.ts
@@ -1,5 +1,6 @@
 import { dummyPlatformForTypeSafety } from './dummyPlatformForTypeSafety'
 import { Gitee } from './Gitee'
+import { Gitea } from './Gitea'
 import { GitHub } from './GitHub'
 
 const platforms: {
@@ -7,6 +8,7 @@ const platforms: {
 } = {
   GitHub: GitHub,
   Gitee: Gitee,
+  Gitea: Gitea,
 }
 
 function resolvePlatform() {