diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index ad1804bfc5..d905231103 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -1,7 +1,7 @@
 *                         @element-hq/element-web-reviewers
 /.github/workflows/**     @element-hq/element-web-team
 /package.json             @element-hq/element-web-team
-/yarn.lock                @element-hq/element-web-team
+/pnpm-lock.yaml           @element-hq/element-web-team
 
 /src/SecurityManager.ts                                                 @element-hq/element-crypto-web-reviewers
 /test/SecurityManager-test.ts                                           @element-hq/element-crypto-web-reviewers
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5d863a6a32..cb69bf88f2 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -44,16 +44,14 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
                   # Disable cache on Windows as it is slower than not caching
                   # https://github.com/actions/setup-node/issues/975
-                  cache: ${{ runner.os != 'Windows' && 'yarn' || '' }}
+                  cache: ${{ runner.os != 'Windows' && 'pnpm' || '' }}
                   node-version: "lts/*"
 
-            # Workaround for yarn install timeouts, especially on Windows
-            - run: yarn config set network-timeout 300000
-
             - name: Fetch layered build
               run: ./scripts/layered.sh
 
@@ -63,7 +61,7 @@ jobs:
             - name: Build
               env:
                   CI_PACKAGE: true
-              run: VERSION=$(scripts/get-version-from-git.sh) yarn build
+              run: VERSION=$(scripts/get-version-from-git.sh) pnpm build
 
             - name: Upload Artifact
               uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
diff --git a/.github/workflows/build_develop.yml b/.github/workflows/build_develop.yml
index 72ebd40d25..cb943f05cf 100644
--- a/.github/workflows/build_develop.yml
+++ b/.github/workflows/build_develop.yml
@@ -28,9 +28,10 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install Dependencies
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index a3e9e40247..fed2bc422d 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -33,17 +33,18 @@ jobs:
                   repository: matrix-org/matrix-js-sdk
                   path: matrix-js-sdk
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
-                  cache-dependency-path: element-web/yarn.lock
+                  cache: "pnpm"
+                  cache-dependency-path: element-web/pnpm-lock.yaml
                   node-version: "lts/*"
 
             - name: Generate automations docs
               working-directory: element-web
               run: |
-                  yarn install --frozen-lockfile
-                  yarn node ./scripts/gen-workflow-mermaid.ts ../element-desktop ../element-web ../matrix-js-sdk > docs/automations.md
+                  pnpm install --frozen-lockfile
+                  pnpm node ./scripts/gen-workflow-mermaid.ts ../element-desktop ../element-web ../matrix-js-sdk > docs/automations.md
                   echo "-   [Automations](automations.md)" >> docs/SUMMARY.md
 
             - name: Setup mdBook
diff --git a/.github/workflows/end-to-end-tests.yaml b/.github/workflows/end-to-end-tests.yaml
index 304e4468e2..9de03f7e5e 100644
--- a/.github/workflows/end-to-end-tests.yaml
+++ b/.github/workflows/end-to-end-tests.yaml
@@ -54,9 +54,10 @@ jobs:
               with:
                   repository: element-hq/element-web
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Fetch layered build
@@ -71,7 +72,7 @@ jobs:
             - name: Build
               env:
                   CI_PACKAGE: true
-              run: VERSION=$(scripts/get-version-from-git.sh) yarn build
+              run: VERSION=$(scripts/get-version-from-git.sh) pnpm build
 
             - name: Upload Artifact
               uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6
@@ -133,18 +134,19 @@ jobs:
                   name: webapp
                   path: webapp
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
-                  cache-dependency-path: yarn.lock
+                  cache: "pnpm"
+                  cache-dependency-path: pnpm-lock.yaml
                   node-version: "lts/*"
 
             - name: Install dependencies
-              run: yarn install --frozen-lockfile
+              run: pnpm install --frozen-lockfile
 
             - name: Get installed Playwright version
               id: playwright
-              run: echo "version=$(yarn list --pattern @playwright/test --depth=0 --json --non-interactive --no-progress | jq -r '.data.trees[].name')" >> $GITHUB_OUTPUT
+              run: echo "version=$(pnpm list @playwright/test --depth=0 --json | jq -r '.[].devDependencies["@playwright/test"].version')" >> $GITHUB_OUTPUT
 
             - name: Cache playwright binaries
               uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
@@ -155,17 +157,17 @@ jobs:
 
             - name: Install Playwright browsers
               if: steps.playwright-cache.outputs.cache-hit != 'true'
-              run: yarn playwright install --with-deps --no-shell
+              run: pnpm playwright install --with-deps --no-shell
 
             - name: Install system dependencies for WebKit
               # Some WebKit dependencies seem to lay outside the cache and will need to be installed separately
               if: matrix.project == 'WebKit' && steps.playwright-cache.outputs.cache-hit == 'true'
-              run: yarn playwright install-deps webkit
+              run: pnpm playwright install-deps webkit
 
             # We skip tests tagged with @mergequeue when running on PRs, but run them in MQ and everywhere else
             - name: Run Playwright tests
               run: |
-                  yarn playwright test \
+                  pnpm playwright test \
                       --shard "${{ matrix.runner }}/${{ needs.build.outputs.num-runners }}" \
                       --project="${{ matrix.project }}" \
                       ${{ (github.event_name == 'pull_request' && matrix.runAllTests == false ) && '--grep-invert @mergequeue' || '' }}
@@ -200,15 +202,16 @@ jobs:
                   persist-credentials: false
                   repository: element-hq/element-web
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               if: inputs.skip != true
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install dependencies
               if: inputs.skip != true
-              run: yarn install --frozen-lockfile
+              run: pnpm install --frozen-lockfile
 
             - name: Download blob reports from GitHub Actions Artifacts
               if: inputs.skip != true
@@ -220,7 +223,7 @@ jobs:
 
             - name: Merge into HTML Report
               if: inputs.skip != true
-              run: yarn playwright merge-reports --reporter=html,./playwright/flaky-reporter.ts,@element-hq/element-web-playwright-common/lib/stale-screenshot-reporter.js ./all-blob-reports
+              run: pnpm playwright merge-reports --reporter=html,./playwright/flaky-reporter.ts,@element-hq/element-web-playwright-common/lib/stale-screenshot-reporter.js ./all-blob-reports
               env:
                   # Only pass creds to the flaky-reporter on main branch runs
                   GITHUB_TOKEN: ${{ github.ref_name == 'develop' && secrets.ELEMENT_BOT_TOKEN || '' }}
diff --git a/.github/workflows/shared-component-publish.yaml b/.github/workflows/shared-component-publish.yaml
index a1b6a0c882..99bcac9a3d 100644
--- a/.github/workflows/shared-component-publish.yaml
+++ b/.github/workflows/shared-component-publish.yaml
@@ -15,10 +15,11 @@ jobs:
             - name: 🧮 Checkout code
               uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - name: 🔧 Set up node environment
               uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version-file: ".node-version"
                   registry-url: "https://registry.npmjs.org"
 
@@ -28,12 +29,12 @@ jobs:
 
             # Need to setup element web too as it needs the translations
             - name: 🛠️ Setup EW
-              run: yarn install --pure-lockfile
+              run: pnpm install --pure-lockfile
 
             - name: 🛠️ Setup
               # When running `install` it also calls the `prepare` step which generates
               # a build
-              run: yarn --cwd packages/shared-components install --pure-lockfile
+              run: pnpm --dir packages/shared-components install --pure-lockfile
 
             - name: 🚀 Publish to npm
               working-directory: packages/shared-components
diff --git a/.github/workflows/shared-component-visual-tests.yaml b/.github/workflows/shared-component-visual-tests.yaml
index b2015f0a08..e242dde766 100644
--- a/.github/workflows/shared-component-visual-tests.yaml
+++ b/.github/workflows/shared-component-visual-tests.yaml
@@ -26,19 +26,20 @@ jobs:
                   persist-credentials: false
                   repository: element-hq/element-web
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install dependencies
               working-directory: packages/shared-components
-              run: yarn install --frozen-lockfile
+              run: pnpm install --frozen-lockfile
 
             - name: Get installed Playwright version
               working-directory: packages/shared-components
               id: playwright
-              run: echo "version=$(yarn list --pattern @playwright/test --depth=0 --json --non-interactive --no-progress | jq -r '.data.trees[].name')" >> $GITHUB_OUTPUT
+              run: echo "version=$(pnpm list @playwright/test --depth=0 --json | jq -r '.[].devDependencies["@playwright/test"].version')" >> $GITHUB_OUTPUT
 
             - name: Cache playwright binaries
               uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
@@ -50,11 +51,11 @@ jobs:
             - name: Install Playwright browsers
               working-directory: packages/shared-components
               if: steps.playwright-cache.outputs.cache-hit != 'true'
-              run: "yarn playwright install --with-deps --only-shell"
+              run: "pnpm playwright install --with-deps --only-shell"
 
             - name: Run Visual tests
               working-directory: packages/shared-components
-              run: "yarn test:storybook --run"
+              run: "pnpm test:storybook --run"
 
             # Workaround for vis silently adding new baselines if they didn't exist
             # Can be removed once https://github.com/repobuddy/visual-testing/issues/516 is released
diff --git a/.github/workflows/static_analysis.yaml b/.github/workflows/static_analysis.yaml
index c26ee1b487..c358269485 100644
--- a/.github/workflows/static_analysis.yaml
+++ b/.github/workflows/static_analysis.yaml
@@ -24,22 +24,23 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install Dependencies
               run: "./scripts/layered.sh"
 
             - name: Typecheck
-              run: "yarn run lint:types"
+              run: "pnpm run lint:types"
 
             - name: Install Shared Component Dependencies
-              run: "yarn --cwd packages/shared-components install"
+              run: "pnpm --dir packages/shared-components install"
 
             - name: Typecheck Shared Components
-              run: "yarn --cwd packages/shared-components run lint:types"
+              run: "pnpm --dir packages/shared-components run lint:types"
 
     i18n_lint_ew:
         name: "i18n Check (Element Web)"
@@ -84,23 +85,24 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             # Does not need branch matching as only analyses this layer
             - name: Install Deps
-              run: "yarn install --frozen-lockfile"
+              run: "pnpm install --frozen-lockfile"
 
             - name: Run Linter
-              run: "yarn run lint:js"
+              run: "pnpm run lint:js"
 
             - name: Install Shared Component Deps
-              run: "yarn --cwd packages/shared-components install --frozen-lockfile"
+              run: "pnpm --dir packages/shared-components install --frozen-lockfile"
 
             - name: Run Linter
-              run: "yarn --cwd packages/shared-components run lint:js"
+              run: "pnpm --dir packages/shared-components run lint:js"
 
     style_lint:
         name: "Style Lint"
@@ -108,17 +110,18 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             # Does not need branch matching as only analyses this layer
             - name: Install Deps
-              run: "yarn install"
+              run: "pnpm install"
 
             - name: Run Linter
-              run: "yarn run lint:style"
+              run: "pnpm run lint:style"
 
     workflow_lint:
         name: "Workflow Lint"
@@ -126,17 +129,18 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             # Does not need branch matching as only analyses this layer
             - name: Install Deps
-              run: "yarn install --frozen-lockfile"
+              run: "pnpm install --frozen-lockfile"
 
             - name: Run Linter
-              run: "yarn lint:workflows"
+              run: "pnpm lint:workflows"
 
     analyse_dead_code:
         name: "Analyse Dead Code"
@@ -144,13 +148,14 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install Deps
-              run: "yarn install --frozen-lockfile"
+              run: "pnpm install --frozen-lockfile"
 
             - name: Run linter
-              run: "yarn run lint:knip"
+              run: "pnpm run lint:knip"
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4b90ca2cb5..ce473d5cbd 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -43,11 +43,12 @@ jobs:
               with:
                   repository: ${{ inputs.matrix-js-sdk-sha && 'element-hq/element-web' || github.repository }}
 
-            - name: Yarn cache
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
+            - name: pnpm cache
               uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
                   node-version: "lts/*"
-                  cache: "yarn"
+                  cache: "pnpm"
 
             - name: Install Deps
               run: "./scripts/layered.sh"
@@ -58,7 +59,7 @@ jobs:
               uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
               with:
                   path: /tmp/jest_cache
-                  key: ${{ hashFiles('**/yarn.lock') }}
+                  key: ${{ hashFiles('**/pnpm-lock.yaml') }}
 
             - name: Get number of CPU cores
               id: cpu-cores
@@ -66,7 +67,7 @@ jobs:
 
             - name: Run tests
               run: |
-                  yarn test \
+                  pnpm test \
                       --coverage=${{ env.ENABLE_COVERAGE }} \
                       --ci \
                       --max-workers ${{ steps.cpu-cores.outputs.count }} \
@@ -122,15 +123,16 @@ jobs:
               with:
                   repository: ${{ inputs.matrix-js-sdk-sha && 'element-hq/element-web' || github.repository }}
 
-            - name: Yarn cache
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
+            - name: pnpm cache
               uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
                   node-version: "lts/*"
-                  cache: "yarn"
+                  cache: "pnpm"
 
             - name: Install Shared Component Deps
               working-directory: "packages/shared-components"
-              run: "yarn install"
+              run: "pnpm install"
 
             - name: Cache storybook & vitest
               uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
@@ -138,12 +140,12 @@ jobs:
                   path: |
                       packages/shared-components/node_modules/.cache
                       packages/shared-components/node_modules/.vite/vitest
-                  key: ${{ hashFiles('packages/shared-components/yarn.lock') }}
+                  key: ${{ hashFiles('packages/shared-components/pnpm-lock.yaml') }}
 
             - name: Get installed Playwright version
               working-directory: packages/shared-components
               id: playwright
-              run: echo "version=$(yarn list --pattern @playwright/test --depth=0 --json --non-interactive --no-progress | jq -r '.data.trees[].name')" >> $GITHUB_OUTPUT
+              run: echo "version=$(pnpm list @playwright/test --depth=0 --json | jq -r '.[].devDependencies["@playwright/test"].version')" >> $GITHUB_OUTPUT
 
             - name: Cache playwright binaries
               uses: actions/cache@cdf6c1fa76f9f475f3d7449005a359c84ca0f306 # v5
@@ -155,11 +157,11 @@ jobs:
             - name: Install Playwright browsers
               working-directory: packages/shared-components
               if: steps.playwright-cache.outputs.cache-hit != 'true'
-              run: "yarn playwright install --with-deps --only-shell"
+              run: "pnpm playwright install --with-deps --only-shell"
 
             - name: Run tests
               working-directory: "packages/shared-components"
-              run: yarn test:unit --coverage=${{ env.ENABLE_COVERAGE }}
+              run: pnpm test:unit --coverage=${{ env.ENABLE_COVERAGE }}
 
             - name: Upload Artifact
               if: env.ENABLE_COVERAGE == 'true'
diff --git a/.github/workflows/update-jitsi.yml b/.github/workflows/update-jitsi.yml
index b37a2967d4..5bcc12d12b 100644
--- a/.github/workflows/update-jitsi.yml
+++ b/.github/workflows/update-jitsi.yml
@@ -11,16 +11,17 @@ jobs:
         steps:
             - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
+            - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
             - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6
               with:
-                  cache: "yarn"
+                  cache: "pnpm"
                   node-version: "lts/*"
 
             - name: Install Deps
-              run: "yarn install --frozen-lockfile"
+              run: "pnpm install --frozen-lockfile"
 
             - name: Fetch Jitsi
-              run: "yarn update:jitsi"
+              run: "pnpm update:jitsi"
 
             - name: Create Pull Request
               uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8