diff --git a/packages/web/src/components/ComparisonView.tsx b/packages/web/src/components/ComparisonView.tsx
index 1c7941e..02e8fbc 100644
--- a/packages/web/src/components/ComparisonView.tsx
+++ b/packages/web/src/components/ComparisonView.tsx
@@ -1,4 +1,4 @@
-import { Component, For, createSignal, createMemo, Show } from 'solid-js';
+import { Component, For, createSignal, createMemo, Show, onMount, onCleanup } from 'solid-js';
 import { ComparisonEntry, calculateChange } from '@ns/core';
 import { formatBytes, formatNumber, formatTime, formatPercent } from '@ns/ui-utils';
 import ArrowRightIcon from 'lucide-solid/icons/arrow-right';
@@ -11,12 +11,62 @@ interface ComparisonViewProps {
   onSelect: (entry: ComparisonEntry) => void;
   onDelete: (id: number) => void;
   precision?: number;
+  pasteMode: 'advance' | 'replace';
+  onPasteModeChange: (mode: 'advance' | 'replace') => void;
+  onPasteStats: (text: string, name: string) => ComparisonEntry | null;
 }
 
 const ComparisonView: Component<ComparisonViewProps> = props => {
   const prec = () => props.precision ?? 2;
   const [leftEntry, setLeftEntry] = createSignal<ComparisonEntry | null>(null);
   const [rightEntry, setRightEntry] = createSignal<ComparisonEntry | null>(null);
+  const [showPasteModal, setShowPasteModal] = createSignal(false);
+  const [pasteError, setPasteError] = createSignal('');
+  const [pasteName, setPasteName] = createSignal('');
+  const [pendingPasteText, setPendingPasteText] = createSignal('');
+
+  const handlePaste = (e: ClipboardEvent) => {
+    const target = e.target as HTMLElement;
+    if (target.tagName === 'INPUT' || target.tagName === 'TEXTAREA' || target.isContentEditable) {
+      return;
+    }
+    const text = e.clipboardData?.getData('text');
+    if (!text) return;
+    try {
+      JSON.parse(text);
+      setPendingPasteText(text);
+      setPasteName(`Snapshot ${props.entries.length + 1}`);
+      setShowPasteModal(true);
+    } catch {
+      // Silently ignore invalid JSON on paste
+    }
+  };
+
+  onMount(() => {
+    document.addEventListener('paste', handlePaste);
+  });
+
+  onCleanup(() => {
+    document.removeEventListener('paste', handlePaste);
+  });
+
+  const confirmPaste = () => {
+    const entry = props.onPasteStats(pendingPasteText(), pasteName());
+    if (!entry) {
+      setPasteError('Failed to process pasted statistics');
+      return;
+    }
+    if (props.pasteMode === 'advance') {
+      if (rightEntry()) {
+        setLeftEntry(rightEntry());
+      }
+      setRightEntry(entry);
+    } else {
+      setRightEntry(entry);
+    }
+    setShowPasteModal(false);
+    setPasteError('');
+  };
 
   const comparison = createMemo(() => {
     const left = leftEntry();
@@ -122,6 +172,22 @@ const ComparisonView: Component<ComparisonViewProps> = props => {
             </For>
           </select>
         </div>
+        <div class="compare-paste-toggle">
+          <button
+            class={props.pasteMode === 'advance' ? 'active' : ''}
+            onClick={() => props.onPasteModeChange('advance')}
+            title="Paste shifts current to baseline"
+          >
+            Auto
+          </button>
+          <button
+            class={props.pasteMode === 'replace' ? 'active' : ''}
+            onClick={() => props.onPasteModeChange('replace')}
+            title="Paste replaces current only"
+          >
+            Replace
+          </button>
+        </div>
       </div>
 
       <Show when={props.entries.length > 0}>
@@ -164,12 +230,12 @@ const ComparisonView: Component<ComparisonViewProps> = props => {
                     when={row.isMissing}
                     fallback={
                       row.format === 'bytes'
-                        ? formatBytes(row.leftValue)
+                        ? formatBytes(row.leftValue, prec())
                         : row.format === 'time'
-                          ? formatTime(row.leftValue)
+                          ? formatTime(row.leftValue, prec())
                           : row.format === 'percent'
-                            ? formatPercent(row.leftValue)
-                            : formatNumber(row.leftValue)
+                            ? formatPercent(row.leftValue, prec())
+                            : formatNumber(row.leftValue, prec())
                     }
                   >
                     <span class="missing-value">N/A</span>
@@ -180,12 +246,12 @@ const ComparisonView: Component<ComparisonViewProps> = props => {
                     when={row.isMissing}
                     fallback={
                       row.format === 'bytes'
-                        ? formatBytes(row.rightValue)
+                        ? formatBytes(row.rightValue, prec())
                         : row.format === 'time'
-                          ? formatTime(row.rightValue)
+                          ? formatTime(row.rightValue, prec())
                           : row.format === 'percent'
-                            ? formatPercent(row.rightValue)
-                            : formatNumber(row.rightValue)
+                            ? formatPercent(row.rightValue, prec())
+                            : formatNumber(row.rightValue, prec())
                     }
                   >
                     <span class="missing-value">N/A</span>
@@ -238,6 +304,57 @@ const ComparisonView: Component<ComparisonViewProps> = props => {
           </Show>
         </div>
       </Show>
+
+      <Show when={showPasteModal()}>
+        <div
+          class="modal-overlay"
+          onClick={() => {
+            setShowPasteModal(false);
+            setPasteError('');
+          }}
+        >
+          <div class="modal" onClick={e => e.stopPropagation()}>
+            <div class="modal-header">
+              <h3>Paste Statistics</h3>
+              <button
+                class="close-btn"
+                onClick={() => {
+                  setShowPasteModal(false);
+                  setPasteError('');
+                }}
+              >
+                <XIcon size={20} />
+              </button>
+            </div>
+            <input
+              type="text"
+              class="snapshot-name-input"
+              placeholder="Enter snapshot name..."
+              value={pasteName()}
+              onInput={e => setPasteName(e.currentTarget.value)}
+              onKeyDown={e => e.key === 'Enter' && confirmPaste()}
+              autofocus
+            />
+            <Show when={pasteError()}>
+              <div class="error">{pasteError()}</div>
+            </Show>
+            <div class="modal-actions">
+              <button
+                class="cancel-btn"
+                onClick={() => {
+                  setShowPasteModal(false);
+                  setPasteError('');
+                }}
+              >
+                Cancel
+              </button>
+              <button class="confirm-btn" onClick={confirmPaste}>
+                Save &amp; Compare
+              </button>
+            </div>
+          </div>
+        </div>
+      </Show>
     </div>
   );
 };
diff --git a/packages/web/src/index.tsx b/packages/web/src/index.tsx
index 578bb8a..31290b8 100644
--- a/packages/web/src/index.tsx
+++ b/packages/web/src/index.tsx
@@ -32,6 +32,7 @@ function App() {
   const [showHelp, setShowHelp] = createSignal(false);
   const [showManageSnapshots, setShowManageSnapshots] = createSignal(false);
   const [precision, setPrecision] = createSignal(2);
+  const [pasteMode, setPasteMode] = createSignal<'advance' | 'replace'>('advance');
   const [isLoading, setIsLoading] = createSignal(true);
 
   const STORAGE_KEY = 'ns-data';
@@ -62,6 +63,9 @@ function App() {
         if (typeof parsed.precision === 'number' && parsed.precision >= 0) {
           setPrecision(parsed.precision);
         }
+        if (parsed.pasteMode === 'advance' || parsed.pasteMode === 'replace') {
+          setPasteMode(parsed.pasteMode);
+        }
       }
     } catch (e) {
       console.warn('Failed to load saved data:', e);
@@ -89,6 +93,7 @@ function App() {
       snaps: ComparisonEntry[],
       v: 'analysis' | 'compare',
       prec: number,
+      pm: 'advance' | 'replace',
     ) => {
       try {
         localStorage.setItem(
@@ -99,6 +104,7 @@ function App() {
             currentRaw: raw,
             view: v,
             precision: prec,
+            pasteMode: pm,
           }),
         );
       } catch (e) {
@@ -115,10 +121,11 @@ function App() {
     const snaps = snapshots();
     const v = view();
     const prec = precision();
+    const pm = pasteMode();
 
     if (isLoading()) return;
 
-    saveToStorage(stats, raw, snaps, v, prec);
+    saveToStorage(stats, raw, snaps, v, prec, pm);
   });
 
   const saveSnapshot = () => {
@@ -171,6 +178,27 @@ function App() {
     }
   };
 
+  const handlePasteStats = (text: string, name: string): ComparisonEntry | null => {
+    let raw: Record<string, unknown>;
+    let data: StatsData;
+    try {
+      raw = JSON.parse(text);
+      data = parseStats(raw);
+    } catch (e) {
+      console.error('Failed to parse pasted stats:', e);
+      return null;
+    }
+    const entry: ComparisonEntry = {
+      id: Date.now(),
+      name: name.trim() || `Snapshot ${snapshots().length + 1}`,
+      data,
+      raw,
+      timestamp: new Date(),
+    };
+    setSnapshots(prev => [...prev, entry]);
+    return entry;
+  };
+
   return (
     <div class="app">
       <header class="header">
@@ -264,6 +292,9 @@ function App() {
               onSelect={entry => setCurrentStats(entry.data)}
               onDelete={deleteSnapshot}
               precision={precision()}
+              pasteMode={pasteMode()}
+              onPasteModeChange={setPasteMode}
+              onPasteStats={handlePasteStats}
             />
           </Show>
         </Show>
diff --git a/packages/web/src/styles.css b/packages/web/src/styles.css
index 95e9806..17b5920 100644
--- a/packages/web/src/styles.css
+++ b/packages/web/src/styles.css
@@ -824,6 +824,9 @@ body {
   color: var(--text-primary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
+  line-height: 1.2;
 }
 
 .metric-label {
@@ -983,6 +986,8 @@ body {
   color: var(--text-primary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .chart-legend {
@@ -1029,6 +1034,8 @@ body {
   color: var(--text-primary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .legend-percent {
@@ -1036,6 +1043,8 @@ body {
   font-size: 0.75rem;
   text-align: right;
   min-width: 40px;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .donut-chart svg {
@@ -1130,6 +1139,8 @@ body {
   color: var(--text-secondary);
   min-width: 80px;
   text-align: right;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .gc-stats {
@@ -1157,6 +1168,8 @@ body {
   color: var(--text-primary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 /* Operations Chart */
@@ -1213,6 +1226,8 @@ body {
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
   text-align: right;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 /* Thunk Chart */
@@ -1267,6 +1282,8 @@ body {
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
   text-align: right;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .thunk-ratio {
@@ -1294,6 +1311,8 @@ body {
 .ratio-label {
   font-size: 0.75rem;
   color: var(--text-muted);
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .dashboard-grid {
@@ -1341,6 +1360,8 @@ body {
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
   text-align: right;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 /* Top Lists */
@@ -1384,6 +1405,9 @@ body {
   color: var(--text-secondary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
+  text-align: right;
 }
 
 .top-item .location {
@@ -1441,6 +1465,36 @@ body {
   justify-content: center;
 }
 
+.compare-paste-toggle {
+  display: flex;
+  gap: 0.25rem;
+  align-items: flex-end;
+  padding: 0 0.5rem;
+}
+
+.compare-paste-toggle button {
+  height: calc(0.75rem * 2 + 1rem + 2px);
+  padding: 0 0.625rem;
+  background: transparent;
+  border: 1px solid var(--border-color);
+  color: var(--text-muted);
+  border-radius: 0.375rem;
+  font-size: 0.75rem;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.compare-paste-toggle button:hover {
+  background: var(--bg-tertiary);
+  color: var(--text-primary);
+}
+
+.compare-paste-toggle button.active {
+  background: var(--accent);
+  border-color: var(--accent);
+  color: white;
+}
+
 .compare-placeholder {
   text-align: center;
   padding: 4rem;
@@ -1510,10 +1564,14 @@ body {
   color: var(--text-secondary);
   font-family: var(--font-nums);
   font-variant-numeric: tabular-nums;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .compare-row .col-change {
   text-align: right;
+  word-break: break-word;
+  overflow-wrap: break-word;
 }
 
 .change-value {