diff --git a/components/Account.vue b/components/Account.vue
index a745b114a..5128ddd2f 100644
--- a/components/Account.vue
+++ b/components/Account.vue
@@ -283,7 +283,7 @@ const addBrackets = (str: string): string => {
         </div>
 
         <TabsNav
-            :tabs="['general', 'cards', 'socials', 'circles', 'backup']"
+            :tabs="['general', 'cards', 'socials', 'circles', 'blocks', 'backup']"
             pills
             showheaders
             navclass="mb-3 border-bottom-0"
@@ -562,6 +562,14 @@ const addBrackets = (str: string): string => {
                 </nuxt-link>
             </template>
 
+            <template #blocks-header>
+                <Icon v="ban" />
+                <T>profile.blocks.header</T>
+            </template>
+            <template #blocks>
+                <BlocksList />
+            </template>
+
             <template #backup-header>
                 <Icon v="copy" />
                 <T>profile.backup.headerShort</T>
diff --git a/components/Ban.vue b/components/Ban.vue
index 0847ee0df..8939b6ae6 100644
--- a/components/Ban.vue
+++ b/components/Ban.vue
@@ -1,6 +1,6 @@
 <template>
     <div v-if="$user() && $user().username !== user.username">
-        <section v-if="$user()">
+        <section>
             <a v-if="!showReportForm" href="#" class="small" @click.prevent="showReportForm = true">
                 <Icon v="spider" />
                 <T>report.action</T>
@@ -37,6 +37,12 @@
                 <T>report.sent</T>
             </div>
         </section>
+        <section>
+            <a href="#" class="small" @click.prevent="block">
+                <Icon v="ban" />
+                <T>profile.blocks.action</T>
+            </a>
+        </section>
         <section v-if="$isGranted('users') || $isGranted('community')">
             <div v-if="banSnapshot" class="my-3">
                 <a
@@ -380,6 +386,11 @@ Unfortunately, I need to remove your account.
                 this.saving = false;
             }
         },
+        async block() {
+            await this.dialogue.confirm(this.$t('profile.blocks.confirm', { username: this.user.username }), 'danger');
+            await this.dialogue.postWithAlertOnError(`/api/user/block/${this.user.id}`);
+            window.location.reload();
+        },
         copyProposal(proposal) {
             this.user.bannedReason = proposal.bannedReason;
             this.user.bannedTerms = proposal.bannedTerms.split(',');
diff --git a/components/BlocksList.vue b/components/BlocksList.vue
new file mode 100644
index 000000000..321ac348b
--- /dev/null
+++ b/components/BlocksList.vue
@@ -0,0 +1,42 @@
+<script lang="ts" setup>
+import { useFetch } from 'nuxt/app';
+
+import useDialogue from '~/composables/useDialogue.ts';
+
+const { $translator: translator } = useNuxtApp();
+const dialogue = useDialogue();
+
+type Block = {
+    id: string;
+    to_userId: string;
+    to_username: string;
+};
+
+const blocks = useFetch<Block[]>(`/api/user/blocks`, { lazy: true });
+
+const unblock = async (block: Block) => {
+    await dialogue.confirm(translator.translate('profile.blocks.unblock.confirm', { username: block.to_username }), 'danger');
+    await dialogue.postWithAlertOnError(`/api/user/unblock/${block.to_userId}`);
+    await blocks.refresh();
+};
+</script>
+
+<template>
+    <Loading :value="blocks.data.value">
+        <ul v-if="blocks.data.value">
+            <li v-if="blocks.data.value.length === 0">
+                <T>profile.blocks.empty</T>
+            </li>
+            <li v-for="block in blocks.data.value" :key="block.id">
+                @{{ block.to_username }}
+                <small class="text-muted">({{ $datetime($ulidTime(block.id)) }})</small>
+                <a href="#" :aria-label="$t('profile.blocks.unblock.action')" class="btn btn-link btn-sm" @click.prevent="unblock(block)">
+                    <Icon v="trash" />
+                </a>
+            </li>
+        </ul>
+        <p class="small mb-0">
+            <Icon v="info-circle" /> <T>profile.blocks.instruction</T>
+        </p>
+    </Loading>
+</template>
diff --git a/locale/_base/translations.suml b/locale/_base/translations.suml
index 31ae1e9a6..e20ff1161 100644
--- a/locale/_base/translations.suml
+++ b/locale/_base/translations.suml
@@ -850,6 +850,20 @@ profile:
             action: 'Remove yourself'
             confirm: 'Are you sure you want to remove your profile from @%username%''s circle?'
         add: 'Add people to your circle'
+    blocks:
+        header: 'Blocked accounts'
+        action: 'Block this person'
+        confirm: >
+            Are you sure you want to block @%username%?
+            You will not be able to see each other's cards or add each other to your circles.
+            This can be reversed in your Account page.
+        unblock:
+            action: 'Unblock this person'
+            confirm: >
+                Are you sure you want to unblock @%username%?
+                You will be able to see each other's cards or add each other to your circles.
+        empty: 'You currently do not have any accounts blocked.'
+        instruction: 'You can block a person by visiting their profile.'
     sensitive:
         header: 'Content warning'
         info: >
diff --git a/locale/en/translations.suml b/locale/en/translations.suml
index f53eb5011..bb1182e8e 100644
--- a/locale/en/translations.suml
+++ b/locale/en/translations.suml
@@ -1067,6 +1067,20 @@ profile:
             action: 'Remove yourself'
             confirm: 'Are you sure you want to remove your profile from @%username%''s circle?'
         add: 'Add people to your circle'
+    blocks:
+        header: 'Blocked accounts'
+        action: 'Block this person'
+        confirm: >
+            Are you sure you want to block @%username%?
+            You will not be able to see each other's cards or add each other to your circles.
+            This can be reversed in your Account page.
+        unblock:
+            action: 'Unblock this person'
+            confirm: >
+                Are you sure you want to unblock @%username%?
+                You will be able to see each other's cards or add each other to your circles.
+        empty: 'You currently do not have any accounts blocked.'
+        instruction: 'You can block a person by visiting their profile.'
     sensitive:
         header: 'Content warning'
         info: >
diff --git a/locale/pl/translations.suml b/locale/pl/translations.suml
index c103e1223..052e34bec 100644
--- a/locale/pl/translations.suml
+++ b/locale/pl/translations.suml
@@ -1690,6 +1690,20 @@ profile:
             action: 'Usuń się'
             confirm: 'Czy na pewno chcesz usunąć link do swojej wizytówki z kręgów osoby @%username%?'
         add: 'Dodaj osoby do swojego kręgu'
+    blocks:
+        header: 'Zablokowane konta'
+        action: 'Zablokuj tę osobę'
+        confirm: >
+            Czy na pewno chcesz zablokować @%username%?
+            Nie będziecie mogły widzieć swoich wizytówek ani dodawać się nawzajem do kręgów.
+            Możesz cofnąć blokadę na stronie „Twoje konto”.
+        unblock:
+            action: 'Unblock this person'
+            confirm: >
+                Czy na pewno chcesz odblokować @%username%?
+                Będziecie mogły znowu widzieć swoje wizytówki oraz dodawać się nawzajem do kręgów.
+        empty: 'You currently do not have any accounts blocked.'
+        instruction: 'You can block a person by visiting their profile.'
     sensitive:
         header: 'Ostrzeżenie o zawartości'
         info: >
@@ -2119,7 +2133,7 @@ ban:
     reason: 'Powód blokady'
     visible: '(to będzie widoczne dla osoby zbanowanej)'
     terms: 'Złamane punkty regulaminu (wymagane)'
-    action: 'Zablokuj tę osobę'
+    action: 'Zbanuj tę osobę'
     confirm: 'Czy na pewno chcesz zbanować @%username%?'
     header: 'Twoje konto jest zablokowane. Twoje profile nie są widoczne publicznie.'
     banned: 'Konto nieaktywne'
diff --git a/migrations/089-block-connections.sql b/migrations/089-block-connections.sql
new file mode 100644
index 000000000..da008fa10
--- /dev/null
+++ b/migrations/089-block-connections.sql
@@ -0,0 +1,12 @@
+-- Up
+
+CREATE TABLE block_connections (
+    id TEXT NOT NULL PRIMARY KEY,
+    from_userId TEXT NOT NULL REFERENCES users ON DELETE CASCADE,
+    to_userId TEXT NOT NULL REFERENCES users ON DELETE CASCADE
+);
+
+CREATE INDEX "block_connections_from_userId" ON "block_connections" ("from_userId");
+CREATE INDEX "block_connections_to_userId" ON "block_connections" ("to_userId");
+
+-- Down
diff --git a/pages/profile/[username].vue b/pages/profile/[username].vue
index 89838bb78..acac72058 100644
--- a/pages/profile/[username].vue
+++ b/pages/profile/[username].vue
@@ -60,7 +60,7 @@ const username = computed(() => {
         return usernameFromRoute;
     }
 
-    if (userAsyncData.data.value.username !== usernameFromRoute && import.meta.client) {
+    if (userAsyncData.data.value.username && userAsyncData.data.value.username !== usernameFromRoute && import.meta.client) {
         history.pushState(
             '',
             document.title,
@@ -74,9 +74,9 @@ const username = computed(() => {
 const { mainPronoun } = useMainPronoun(pronounLibrary, profile, translator);
 const flags = buildFlags(config.locale);
 useSimpleHead({
-    title: `@${username.value}`,
+    title: username.value ? `@${username.value}` : undefined,
     description: computed(() => profile.value ? profile.value.description ?? null : null),
-    banner: `api/banner/@${username.value}.png`,
+    banner: username.value ? `api/banner/@${username.value}.png` : undefined,
     noindex: true,
     keywords: computed(() => profile.value?.flags?.map((flagName) => flags[flagName])
         .filter((flag) => flag !== undefined)
diff --git a/server/express/profile.ts b/server/express/profile.ts
index 4d393db7f..0280eb12e 100644
--- a/server/express/profile.ts
+++ b/server/express/profile.ts
@@ -495,14 +495,30 @@ const fetchCircles = async (
     }));
 };
 
+const isUserBlocked = async (db: Database, user: any, otherUser: any): Promise<boolean> => {
+    if (!user || !otherUser || user.id === otherUser.id) {
+        return false;
+    }
+
+    const row = await db.get<{ c: number }>(SQL`
+        SELECT count(*) as c
+        FROM block_connections
+        WHERE (from_userId = ${user.id} AND to_userId = ${otherUser.id})
+          OR (from_userId = ${otherUser.id} AND to_userId = ${user.id})
+    `);
+
+    return row!.c > 0;
+};
+
 const router = Router();
 
 const fetchProfilesRoute = async (req: Request, res: Response, locale: string, user: any): Promise<Response> => {
     const isSelf = !!req.user && req.user.username === req.params.username;
     const isAdmin = req.isGranted('users') || req.isGranted('community');
     const opts = new ProfileOptions(req.query, req.locales);
+    const isBlocked = await isUserBlocked(req.db, req.user, user);
 
-    if (!user || user.bannedReason !== null && !isAdmin && !isSelf) {
+    if (!user || isBlocked || user.bannedReason !== null && !isAdmin && !isSelf) {
         return res.json({
             profiles: {},
         });
@@ -573,6 +589,11 @@ router.get('/profile/get-id/:id', handleErrorAsync(async (req, res) => {
 }));
 
 router.get('/profile/versions/:username', handleErrorAsync(async (req, res) => {
+    const user = await req.db.get<Pick<UserRow, 'id'>>(SQL`SELECT * FROM users WHERE usernameNorm = ${normalise(req.params.username)}`);
+    if (await isUserBlocked(req.db, req.user, user)) {
+        return res.json([]);
+    }
+
     return res.json((await req.db.all<Pick<ProfileRow, 'locale'>>(SQL`
         SELECT
             profiles.locale
@@ -832,7 +853,7 @@ router.post('/profile/save', handleErrorAsync(async (req, res) => {
     for (const connection of profile.circle) {
         const toUserId = usernameIdMap[normaliseWithLink(connection.username)];
         const relationship = connection.relationship.substring(0, 64).trim();
-        if (toUserId === undefined || !relationship) {
+        if (toUserId === undefined || !relationship || await isUserBlocked(req.db, req.user, { id: toUserId })) {
             continue;
         }
         await req.db.get(SQL`INSERT INTO user_connections (id, from_profileId, to_userId, relationship) VALUES (
diff --git a/server/express/user.ts b/server/express/user.ts
index 7f8190e26..bbb60b270 100644
--- a/server/express/user.ts
+++ b/server/express/user.ts
@@ -1006,4 +1006,57 @@ router.get('/user/social-lookup/:provider/:identifier', handleErrorAsync(async (
     return res.json(row ? row.username : null);
 }));
 
+router.get('/user/blocks', handleErrorAsync(async (req, res) => {
+    if (!req.user) {
+        return res.status(401).json({ error: 'Unauthorised' });
+    }
+
+    const rows = await req.db.all<{ id: string; to_userId: string; to_username: string }[]>(SQL`
+        SELECT b.id, b.to_userId, u.username AS to_username
+        FROM block_connections b
+        LEFT JOIN users u ON b.to_userId = u.id
+        WHERE from_userId = ${req.user.id}
+        ORDER BY b.id DESC
+    `);
+
+    return res.json(rows);
+}));
+
+router.post('/user/block/:id', handleErrorAsync(async (req, res) => {
+    const id = req.params.id;
+    const blockedUser = await req.db.get<UserRow>(SQL`SELECT * FROM users WHERE id = ${id}`);
+    if (!req.user || !blockedUser || req.user.id === blockedUser.id) {
+        return res.status(401).json({ error: 'Unauthorised' });
+    }
+
+    await req.db.get(SQL`
+        INSERT INTO block_connections (id, from_userId, to_userId)
+        VALUES (${ulid()}, ${req.user.id}, ${blockedUser.id})
+    `);
+
+    await req.db.get(SQL`
+        DELETE FROM user_connections
+        WHERE (from_profileId IN (SELECT id FROM profiles WHERE userId = ${req.user.id}) AND to_userId = ${blockedUser.id})
+          OR (from_profileId IN (SELECT id FROM profiles WHERE userId = ${blockedUser.id}) AND to_userId = ${req.user.id})
+    `);
+
+    return res.json(null);
+}));
+
+router.post('/user/unblock/:id', handleErrorAsync(async (req, res) => {
+    const id = req.params.id;
+    const blockedUser = await req.db.get<UserRow>(SQL`SELECT * FROM users WHERE id = ${id}`);
+    if (!req.user || !blockedUser || req.user.id === blockedUser.id) {
+        return res.status(401).json({ error: 'Unauthorised' });
+    }
+
+    await req.db.get(SQL`
+        DELETE FROM block_connections
+        WHERE from_userId = ${req.user.id}
+          AND to_userId = ${blockedUser.id}
+    `);
+
+    return res.json(null);
+}));
+
 export default router;