diff --git a/crates/archivr-core/src/archive.rs b/crates/archivr-core/src/archive.rs
index 0e52846..7a5f18e 100644
--- a/crates/archivr-core/src/archive.rs
+++ b/crates/archivr-core/src/archive.rs
@@ -303,6 +303,144 @@ pub fn resolve_artifact_path(
     Ok(canonical_artifact)
 }
 
+#[derive(Debug, Clone, Default)]
+pub struct SearchEntriesQuery {
+    /// Free-text term: LIKE-matched against title, canonical_url, entry_uid, source_kind, entity_kind, visibility
+    pub q: Option<String>,
+    /// Exact match on e.source_kind
+    pub source_kind: Option<String>,
+    /// Exact match on e.entity_kind
+    pub entity_kind: Option<String>,
+    /// LIKE-matched against si.canonical_url
+    pub url: Option<String>,
+    /// LIKE-matched against e.title
+    pub title: Option<String>,
+    /// e.archived_at >= after (inclusive, ISO 8601)
+    pub after: Option<String>,
+    /// e.archived_at < before (exclusive, ISO 8601)
+    pub before: Option<String>,
+}
+
+/// Parses a raw search string into a [`SearchEntriesQuery`].
+///
+/// Recognized prefixes: `source:`, `type:`, `url:`, `title:`, `after:`, `before:`.
+/// Tokens with an unrecognized `prefix:` return `Err(prefix)`.
+/// Remaining non-prefix tokens are joined as the free-text `q`.
+/// Quoted values (`title:"resume templates"`) are supported for single-word values
+/// after the colon; leading/trailing double quotes are stripped.
+pub fn parse_search_query(raw: &str) -> Result<SearchEntriesQuery, String> {
+    let mut query = SearchEntriesQuery::default();
+    let mut free_text_tokens: Vec<&str> = Vec::new();
+
+    for token in raw.split_whitespace() {
+        if let Some(colon_pos) = token.find(':') {
+            let prefix = &token[..colon_pos];
+            let value_raw = &token[colon_pos + 1..];
+            // Strip surrounding double quotes if present
+            let value = value_raw.trim_matches('"').to_string();
+
+            match prefix {
+                "source" => query.source_kind = Some(value),
+                "type"   => query.entity_kind = Some(value),
+                "url"    => query.url = Some(value),
+                "title"  => query.title = Some(value),
+                "after"  => query.after = Some(value),
+                "before" => query.before = Some(value),
+                other    => return Err(other.to_string()),
+            }
+        } else {
+            free_text_tokens.push(token);
+        }
+    }
+
+    let q = free_text_tokens.join(" ");
+    query.q = if q.is_empty() { None } else { Some(q) };
+
+    Ok(query)
+}
+
+/// Searches archived entries matching all non-`None` fields in `query`.
+///
+/// Returns root entries only (same scope as [`list_root_entries`]).
+pub fn search_entries(
+    conn: &rusqlite::Connection,
+    query: &SearchEntriesQuery,
+) -> Result<Vec<EntrySummary>> {
+    let mut sql = String::from(
+        "SELECT e.entry_uid, e.archived_at, e.source_kind, e.entity_kind, e.title, \
+         e.visibility, si.canonical_url, COUNT(ea.id) AS artifact_count, \
+         COALESCE(SUM(b.byte_size), 0) AS total_artifact_bytes \
+         FROM archived_entries e \
+         JOIN source_identities si ON si.id = e.source_identity_id \
+         LEFT JOIN entry_artifacts ea ON ea.entry_id = e.id \
+         LEFT JOIN blobs b ON b.id = ea.blob_id \
+         WHERE e.parent_entry_id IS NULL",
+    );
+
+    let mut params: Vec<String> = Vec::new();
+
+    if let Some(q) = &query.q {
+        let term = format!("%{}%", q.to_lowercase());
+        let n = params.len() + 1;
+        sql.push_str(&format!(
+            " AND (LOWER(e.title) LIKE ?{n} OR LOWER(si.canonical_url) LIKE ?{n} \
+             OR LOWER(e.entry_uid) LIKE ?{n} OR LOWER(e.source_kind) LIKE ?{n} \
+             OR LOWER(e.entity_kind) LIKE ?{n} OR LOWER(e.visibility) LIKE ?{n})"
+        ));
+        params.push(term);
+    }
+    if let Some(sk) = &query.source_kind {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND e.source_kind = ?{n}"));
+        params.push(sk.clone());
+    }
+    if let Some(ek) = &query.entity_kind {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND e.entity_kind = ?{n}"));
+        params.push(ek.clone());
+    }
+    if let Some(u) = &query.url {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND LOWER(si.canonical_url) LIKE ?{n}"));
+        params.push(format!("%{}%", u.to_lowercase()));
+    }
+    if let Some(t) = &query.title {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND LOWER(e.title) LIKE ?{n}"));
+        params.push(format!("%{}%", t.to_lowercase()));
+    }
+    if let Some(a) = &query.after {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND e.archived_at >= ?{n}"));
+        params.push(a.clone());
+    }
+    if let Some(b) = &query.before {
+        let n = params.len() + 1;
+        sql.push_str(&format!(" AND e.archived_at < ?{n}"));
+        params.push(b.clone());
+    }
+
+    sql.push_str(" GROUP BY e.id ORDER BY e.archived_at DESC, e.id DESC");
+
+    let mut stmt = conn.prepare(&sql)?;
+    let entries = stmt
+        .query_map(rusqlite::params_from_iter(params.iter()), |row| {
+            Ok(EntrySummary {
+                entry_uid: row.get(0)?,
+                archived_at: row.get(1)?,
+                source_kind: row.get(2)?,
+                entity_kind: row.get(3)?,
+                title: row.get(4)?,
+                visibility: row.get(5)?,
+                original_url: row.get(6)?,
+                artifact_count: row.get(7)?,
+                total_artifact_bytes: row.get(8)?,
+            })
+        })?
+        .collect::<rusqlite::Result<Vec<_>>>()?;
+    Ok(entries)
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -494,4 +632,177 @@ mod tests {
         assert!(resolve_artifact_path(&store_path, &artifact).is_err());
         let _ = fs::remove_dir_all(&root);
     }
+
+    // ---- parse_search_query tests ----
+
+    #[test]
+    fn parse_empty_query_returns_default() {
+        let q = parse_search_query("").unwrap();
+        assert!(q.q.is_none());
+        assert!(q.source_kind.is_none());
+        assert!(q.entity_kind.is_none());
+    }
+
+    #[test]
+    fn parse_plain_text_sets_q() {
+        let q = parse_search_query("polymarket").unwrap();
+        assert_eq!(q.q.as_deref(), Some("polymarket"));
+    }
+
+    #[test]
+    fn parse_prefix_source_sets_source_kind() {
+        let q = parse_search_query("source:x").unwrap();
+        assert_eq!(q.source_kind.as_deref(), Some("x"));
+        assert!(q.q.is_none());
+    }
+
+    #[test]
+    fn parse_prefix_type_sets_entity_kind() {
+        let q = parse_search_query("type:tweet").unwrap();
+        assert_eq!(q.entity_kind.as_deref(), Some("tweet"));
+    }
+
+    #[test]
+    fn parse_mixed_plain_and_prefix() {
+        let q = parse_search_query("polymarket type:tweet").unwrap();
+        assert_eq!(q.q.as_deref(), Some("polymarket"));
+        assert_eq!(q.entity_kind.as_deref(), Some("tweet"));
+    }
+
+    #[test]
+    fn parse_unknown_prefix_returns_err() {
+        let result = parse_search_query("foo:bar");
+        assert!(result.is_err());
+        assert_eq!(result.unwrap_err(), "foo");
+    }
+
+    #[test]
+    fn parse_after_before_dates() {
+        let q = parse_search_query("after:2026-01-01 before:2026-04-01").unwrap();
+        assert_eq!(q.after.as_deref(), Some("2026-01-01"));
+        assert_eq!(q.before.as_deref(), Some("2026-04-01"));
+    }
+
+    // ---- search_entries tests ----
+
+    fn make_test_db_with_entries() -> rusqlite::Connection {
+        let conn = rusqlite::Connection::open_in_memory().unwrap();
+        database::initialize_schema(&conn).unwrap();
+        let user_id = database::ensure_default_user(&conn).unwrap();
+        let run = database::create_archive_run(&conn, user_id, 2).unwrap();
+
+        // Entry 1: tweet by source x
+        let si1 = database::upsert_source_identity(
+            &conn, "x", "tweet", Some("t-1"),
+            Some("https://x.com/user/status/1"),
+            "https://x.com/user/status/1",
+        ).unwrap();
+        database::create_archived_entry(
+            &conn,
+            &database::NewEntry {
+                source_identity_id: si1,
+                archive_run_id: run.id,
+                parent_entry_id: None,
+                root_entry_id: None,
+                created_by_user_id: user_id,
+                owned_by_user_id: user_id,
+                source_kind: "x".to_string(),
+                entity_kind: "tweet".to_string(),
+                title: Some("Polymarket tweet".to_string()),
+                visibility: "private".to_string(),
+                representation_kind: "json".to_string(),
+                source_metadata_json: "{}".to_string(),
+                display_metadata_json: None,
+            },
+        ).unwrap();
+
+        // Entry 2: web page
+        let si2 = database::upsert_source_identity(
+            &conn, "web", "page", Some("page-1"),
+            Some("https://medium.com/article"),
+            "https://medium.com/article",
+        ).unwrap();
+        database::create_archived_entry(
+            &conn,
+            &database::NewEntry {
+                source_identity_id: si2,
+                archive_run_id: run.id,
+                parent_entry_id: None,
+                root_entry_id: None,
+                created_by_user_id: user_id,
+                owned_by_user_id: user_id,
+                source_kind: "web".to_string(),
+                entity_kind: "page".to_string(),
+                title: Some("Resume Templates".to_string()),
+                visibility: "private".to_string(),
+                representation_kind: "html".to_string(),
+                source_metadata_json: "{}".to_string(),
+                display_metadata_json: None,
+            },
+        ).unwrap();
+
+        conn
+    }
+
+    #[test]
+    fn search_empty_query_returns_all_root_entries() {
+        let conn = make_test_db_with_entries();
+        let all = list_root_entries(&conn).unwrap();
+        let searched = search_entries(&conn, &SearchEntriesQuery::default()).unwrap();
+        assert_eq!(all.len(), searched.len());
+    }
+
+    #[test]
+    fn search_q_filters_on_title() {
+        let conn = make_test_db_with_entries();
+        let results = search_entries(&conn, &SearchEntriesQuery {
+            q: Some("polymarket".to_string()),
+            ..Default::default()
+        }).unwrap();
+        assert_eq!(results.len(), 1);
+        assert_eq!(results[0].entity_kind, "tweet");
+    }
+
+    #[test]
+    fn search_entity_kind_exact_match() {
+        let conn = make_test_db_with_entries();
+        let results = search_entries(&conn, &SearchEntriesQuery {
+            entity_kind: Some("page".to_string()),
+            ..Default::default()
+        }).unwrap();
+        assert_eq!(results.len(), 1);
+        assert_eq!(results[0].source_kind, "web");
+    }
+
+    #[test]
+    fn search_url_like_filter() {
+        let conn = make_test_db_with_entries();
+        let results = search_entries(&conn, &SearchEntriesQuery {
+            url: Some("medium.com".to_string()),
+            ..Default::default()
+        }).unwrap();
+        assert_eq!(results.len(), 1);
+        assert_eq!(results[0].title.as_deref(), Some("Resume Templates"));
+    }
+
+    #[test]
+    fn search_no_match_returns_empty() {
+        let conn = make_test_db_with_entries();
+        let results = search_entries(&conn, &SearchEntriesQuery {
+            q: Some("zzznonexistent".to_string()),
+            ..Default::default()
+        }).unwrap();
+        assert!(results.is_empty());
+    }
+
+    #[test]
+    fn search_multiple_filters_compound() {
+        let conn = make_test_db_with_entries();
+        let results = search_entries(&conn, &SearchEntriesQuery {
+            source_kind: Some("x".to_string()),
+            entity_kind: Some("tweet".to_string()),
+            ..Default::default()
+        }).unwrap();
+        assert_eq!(results.len(), 1);
+    }
 }
diff --git a/crates/archivr-server/src/routes.rs b/crates/archivr-server/src/routes.rs
index 9b1eb1f..332e5c3 100644
--- a/crates/archivr-server/src/routes.rs
+++ b/crates/archivr-server/src/routes.rs
@@ -3,7 +3,7 @@ use std::{path::PathBuf, sync::Arc};
 use archivr_core::{archive, database};
 use axum::{
     Json, Router,
-    extract::{Path, Request, State},
+    extract::{Path, Query, Request, State},
     http::StatusCode,
     response::{IntoResponse, Response},
     routing::get,
@@ -18,6 +18,11 @@ pub struct AppState {
     registry: Arc<ServerRegistry>,
 }
 
+#[derive(Debug, serde::Deserialize, Default)]
+pub struct EntrySearchParams {
+    pub q: Option<String>,
+}
+
 pub fn app(registry: ServerRegistry) -> Router {
     let state = AppState {
         registry: Arc::new(registry),
@@ -28,6 +33,7 @@ pub fn app(registry: ServerRegistry) -> Router {
         .route("/health", get(|| async { "ok" }))
         .route("/api/archives", get(list_archives))
         .route("/api/archives/:archive_id/entries", get(list_entries))
+        .route("/api/archives/:archive_id/entries/search", get(search_entries_handler))
         .route(
             "/api/archives/:archive_id/entries/:entry_uid",
             get(entry_detail),
@@ -61,6 +67,23 @@ async fn list_entries(
     Ok(Json(archive::list_root_entries(&conn)?))
 }
 
+async fn search_entries_handler(
+    State(state): State<AppState>,
+    Path(archive_id): Path<String>,
+    Query(params): Query<EntrySearchParams>,
+) -> Result<Json<Vec<archive::EntrySummary>>, ApiError> {
+    let mounted = mounted_archive(&state, &archive_id)?;
+    let conn = database::open_or_initialize(&mounted.archive_path)?;
+    let raw = params.q.as_deref().unwrap_or("");
+    let search_query = archive::parse_search_query(raw)
+        .map_err(|prefix| ApiError::bad_request(&format!("unknown search prefix: {prefix}")));
+    let search_query = match search_query {
+        Ok(q) => q,
+        Err(e) => return Err(e),
+    };
+    Ok(Json(archive::search_entries(&conn, &search_query)?))
+}
+
 async fn entry_detail(
     State(state): State<AppState>,
     Path((archive_id, entry_uid)): Path<(String, String)>,
@@ -130,6 +153,13 @@ impl ApiError {
             message: message.to_string(),
         }
     }
+
+    fn bad_request(message: &str) -> Self {
+        Self {
+            status: StatusCode::BAD_REQUEST,
+            message: message.to_string(),
+        }
+    }
 }
 
 impl<E> From<E> for ApiError
@@ -359,4 +389,78 @@ mod tests {
             .unwrap();
         assert_eq!(response.status(), StatusCode::OK);
     }
+
+    #[tokio::test]
+    async fn search_missing_archive_returns_404() {
+        let response = app(ServerRegistry::default())
+            .oneshot(
+                Request::builder()
+                    .uri("/api/archives/nope/entries/search?q=anything")
+                    .body(Body::empty())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(response.status(), StatusCode::NOT_FOUND);
+    }
+
+    #[tokio::test]
+    async fn search_empty_q_returns_ok() {
+        let dir = tempfile::tempdir().unwrap();
+        archivr_core::archive::initialize_archive(
+            dir.path(),
+            &dir.path().join("store"),
+            "test",
+            false,
+        )
+        .unwrap();
+        let archive_path = dir.path().join(".archivr");
+        let registry = ServerRegistry {
+            archives: vec![MountedArchive {
+                id: "test".to_string(),
+                label: "Test".to_string(),
+                archive_path,
+            }],
+        };
+        let response = app(registry)
+            .oneshot(
+                Request::builder()
+                    .uri("/api/archives/test/entries/search")
+                    .body(Body::empty())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(response.status(), StatusCode::OK);
+    }
+
+    #[tokio::test]
+    async fn search_unknown_prefix_returns_400() {
+        let dir = tempfile::tempdir().unwrap();
+        archivr_core::archive::initialize_archive(
+            dir.path(),
+            &dir.path().join("store"),
+            "test",
+            false,
+        )
+        .unwrap();
+        let archive_path = dir.path().join(".archivr");
+        let registry = ServerRegistry {
+            archives: vec![MountedArchive {
+                id: "test".to_string(),
+                label: "Test".to_string(),
+                archive_path,
+            }],
+        };
+        let response = app(registry)
+            .oneshot(
+                Request::builder()
+                    .uri("/api/archives/test/entries/search?q=unknownprefix%3Aval")
+                    .body(Body::empty())
+                    .unwrap(),
+            )
+            .await
+            .unwrap();
+        assert_eq!(response.status(), StatusCode::BAD_REQUEST);
+    }
 }
diff --git a/crates/archivr-server/static/app.js b/crates/archivr-server/static/app.js
index cab3dd8..148f1d9 100644
--- a/crates/archivr-server/static/app.js
+++ b/crates/archivr-server/static/app.js
@@ -2,7 +2,6 @@ const state = {
   archives: [],
   archiveId: null,
   entries: [],
-  filteredEntries: [],
   selectedEntryUid: null,
 };
 
@@ -71,33 +70,16 @@ function renderArchives() {
   }
 }
 
-function applyEntryFilter() {
-  const query = searchInput.value.trim().toLowerCase();
-  if (!query) {
-    state.filteredEntries = state.entries;
-    return;
-  }
-  state.filteredEntries = state.entries.filter((entry) => {
-    const haystack = [
-      entry.title,
-      entry.original_url,
-      entry.entry_uid,
-      entry.source_kind,
-      entry.entity_kind,
-      entry.visibility,
-    ]
-      .filter(Boolean)
-      .join(" ")
-      .toLowerCase();
-    return haystack.includes(query);
-  });
-}
 
 function renderEntries() {
   entriesBody.innerHTML = "";
-  resultCount.textContent = `${state.filteredEntries.length} entries`;
+  if (state.entries.length === 0 && searchInput.value.trim()) {
+    resultCount.textContent = "No results.";
+  } else {
+    resultCount.textContent = `${state.entries.length} entries`;
+  }
 
-  for (const entry of state.filteredEntries) {
+  for (const entry of state.entries) {
     const row = document.createElement("tr");
     row.tabIndex = 0;
     row.dataset.entryUid = entry.entry_uid;
@@ -233,12 +215,21 @@ async function loadRuns() {
   }
 }
 
-async function loadEntries() {
-  state.entries = await getJson(`/api/archives/${state.archiveId}/entries`);
-  state.selectedEntryUid = null;
-  applyEntryFilter();
+async function loadEntries(q = "") {
+  const trimmed = q.trim();
+  const url = trimmed
+    ? `/api/archives/${state.archiveId}/entries/search?q=${encodeURIComponent(trimmed)}`
+    : `/api/archives/${state.archiveId}/entries`;
+  searchInput.setAttribute("aria-busy", "true");
+  try {
+    state.entries = await getJson(url);
+  } catch (err) {
+    resultCount.textContent = "Search failed. Try again.";
+    state.entries = [];
+  } finally {
+    searchInput.removeAttribute("aria-busy");
+  }
   renderEntries();
-  contextBody.textContent = "Select an entry.";
 }
 
 async function loadArchives() {
@@ -254,15 +245,26 @@ async function loadArchives() {
   }
 }
 
+function debounce(fn, ms) {
+  let timer;
+  return (...args) => {
+    clearTimeout(timer);
+    timer = setTimeout(() => fn(...args), ms);
+  };
+}
+
 archiveSwitcher.addEventListener("change", async () => {
   state.archiveId = archiveSwitcher.value;
   await loadEntries();
   await loadRuns();
 });
 
+const debouncedSearch = debounce((q) => {
+  if (state.archiveId) loadEntries(q);
+}, 300);
+
 searchInput.addEventListener("input", () => {
-  applyEntryFilter();
-  renderEntries();
+  debouncedSearch(searchInput.value);
 });
 
 navButtons.forEach((button) => {
diff --git a/crates/archivr-server/static/styles.css b/crates/archivr-server/static/styles.css
index 8e338e6..a1b1395 100644
--- a/crates/archivr-server/static/styles.css
+++ b/crates/archivr-server/static/styles.css
@@ -370,3 +370,7 @@ select {
   background: var(--line);
   text-decoration: underline;
 }
+/* Search loading state */
+.search-input[aria-busy="true"] {
+  cursor: progress;
+}