diff --git a/enhanced_conversion_script.js b/enhanced_conversion_script.js
new file mode 100644
index 0000000..936d764
--- /dev/null
+++ b/enhanced_conversion_script.js
@@ -0,0 +1,23 @@
+// Enhanced mermaid conversion script that preserves newlines for all chart types
+export const code = async (inputs) => {
+  const raw = String(inputs.diagram || "").trim();
+  if (!raw) throw new Error("No Mermaid input provided");
+  
+  // Normalize line endings first
+  const normalizedDiagram = raw
+    .replace(/\r\n/g, '\n')  // Convert Windows line endings
+    .replace(/\r/g, '\n');   // Convert old Mac line endings
+  
+  // Base64 encode to preserve exact content including newlines
+  const base64Encoded = Buffer.from(normalizedDiagram, 'utf8').toString('base64');
+  
+  // Create a wrapper that tells the server this is base64 encoded
+  const wrappedDiagram = `%%{init: {"base64": true}}%%\n${base64Encoded}`;
+  
+  console.log("Original diagram length:", normalizedDiagram.length);
+  console.log("Original has newlines:", normalizedDiagram.includes('\n'));
+  console.log("Base64 encoded length:", base64Encoded.length);
+  console.log("Wrapped diagram:", wrappedDiagram);
+  
+  return { rawDsl: wrappedDiagram };
+};
diff --git a/final_fixed_api_call.js b/final_fixed_api_call.js
new file mode 100644
index 0000000..7f8daed
--- /dev/null
+++ b/final_fixed_api_call.js
@@ -0,0 +1,47 @@
+// Final fixed API call - handles URL encoding edge cases properly
+export const code = async (inputs) => {
+  const { diagram, format } = inputs;
+
+  if (!diagram || !diagram.trim()) {
+    throw new Error("No Mermaid input provided");
+  }
+
+  // Normalize line endings
+  const normalizedDiagram = diagram
+    .replace(/\r\n/g, '\n')  // Convert Windows line endings
+    .replace(/\r/g, '\n')    // Convert old Mac line endings
+    .trim();                 // Remove leading/trailing whitespace
+
+  // Use URLSearchParams for proper encoding of complex content
+  const params = new URLSearchParams();
+  params.set('type', format);
+  params.set('data', normalizedDiagram);
+  
+  // Log for debugging
+  console.log("Original diagram:");
+  console.log(JSON.stringify(normalizedDiagram));
+  console.log("URL params:");
+  console.log(params.toString());
+
+  // Build URL manually to avoid double encoding issues
+  const url = `https://diagrams.starbit.cloud/generate?${params.toString()}`;
+  
+  const resp = await fetch(url, {
+    method: "GET",
+    headers: {
+      'Accept': 'image/svg+xml, image/png, */*',
+      'User-Agent': 'Mermaid-Client/1.0'
+    }
+  });
+
+  if (!resp.ok) {
+    const txt = await resp.text();
+    throw new Error(`Mermaid-server error ${resp.status}: ${txt}`);
+  }
+
+  const buffer = Buffer.from(await resp.arrayBuffer());
+  const mime = format === "png" ? "image/png" : "image/svg+xml";
+  const file = `data:${mime};base64,${buffer.toString("base64")}`;
+
+  return { file };
+};
diff --git a/internal/diagram.go b/internal/diagram.go
index 8473e96..08d6535 100644
--- a/internal/diagram.go
+++ b/internal/diagram.go
@@ -21,6 +21,13 @@ func NewDiagram(description []byte, imgType string) *Diagram {
 	fmt.Printf("DEBUG: After TrimSpace: %q\n", trimmed)
 	fmt.Printf("DEBUG: Still contains newlines: %t\n", strings.Contains(trimmed, "\n"))
 	
+	// Decode NEWLINE markers back to actual newlines for complex diagrams
+	if strings.Contains(trimmed, " NEWLINE ") {
+		trimmed = strings.ReplaceAll(trimmed, " NEWLINE ", "\n")
+		fmt.Printf("DEBUG: After NEWLINE decoding: %q\n", trimmed)
+		fmt.Printf("DEBUG: Now contains newlines: %t\n", strings.Contains(trimmed, "\n"))
+	}
+	
 	return &Diagram{
 		description: []byte(trimmed),
 		lastTouched: time.Now(),
diff --git a/mermaidcli/performance_quadrant.mmd b/mermaidcli/performance_quadrant.mmd
deleted file mode 100644
index 4593c59..0000000
--- a/mermaidcli/performance_quadrant.mmd
+++ /dev/null
@@ -1,18 +0,0 @@
-quadrantChart
-    title Website Performance Analysis
-    x-axis Low Traffic --> High Traffic
-    y-axis Low Conversion --> High Conversion
-    
-    quadrant-1 Stars (High Traffic, High Conversion)
-    quadrant-2 Question Marks (Low Traffic, High Conversion)
-    quadrant-3 Dogs (Low Traffic, Low Conversion)
-    quadrant-4 Cash Cows (High Traffic, Low Conversion)
-    
-    Homepage: [0.8, 0.9]
-    Product Pages: [0.7, 0.8]
-    Blog Posts: [0.6, 0.4]
-    Contact Page: [0.2, 0.7]
-    About Page: [0.3, 0.3]
-    Pricing Page: [0.5, 0.8]
-    Support Page: [0.4, 0.5]
-    FAQ Page: [0.3, 0.6]
diff --git a/simple_post_fix.js b/simple_post_fix.js
new file mode 100644
index 0000000..3572c7a
--- /dev/null
+++ b/simple_post_fix.js
@@ -0,0 +1,36 @@
+// Simple POST fix - back to basics with proper headers
+export const code = async (inputs) => {
+  const { diagram, format } = inputs;
+
+  if (!diagram || !diagram.trim()) {
+    throw new Error("No Mermaid input provided");
+  }
+
+  // Ensure proper line endings (just normalize, don't over-process)
+  const cleanDiagram = diagram.replace(/\r\n/g, '\n').replace(/\r/g, '\n');
+  
+  console.log("Sending diagram (length: " + cleanDiagram.length + "):");
+  console.log(JSON.stringify(cleanDiagram));
+
+  const url = `https://diagrams.starbit.cloud/generate?type=${format}`;
+  
+  const resp = await fetch(url, {
+    method: "POST",
+    headers: {
+      "Content-Type": "text/plain",
+      "Content-Length": cleanDiagram.length.toString()
+    },
+    body: cleanDiagram
+  });
+
+  if (!resp.ok) {
+    const txt = await resp.text();
+    throw new Error(`Mermaid-server error ${resp.status}: ${txt}`);
+  }
+
+  const buffer = Buffer.from(await resp.arrayBuffer());
+  const mime = format === "png" ? "image/png" : "image/svg+xml";
+  const file = `data:${mime};base64,${buffer.toString("base64")}`;
+
+  return { file };
+};
diff --git a/single_line_examples.md b/single_line_examples.md
new file mode 100644
index 0000000..1b49782
--- /dev/null
+++ b/single_line_examples.md
@@ -0,0 +1,50 @@
+# Single Line Mermaid Examples
+
+## Basic Flowchart (Single Line)
+```
+graph TD; A[Analytics]-->B[Traffic]; A-->C[Revenue]; B-->D[Desktop]; B-->E[Mobile]
+```
+
+## Simple Analytics Dashboard
+```
+graph LR; A[Website]-->B[Users: 1.2M]; A-->C[Revenue: $450K]; A-->D[Growth: +25%]
+```
+
+## Process Flow
+```
+graph TD; Start[Start]-->Process[Process Data]-->Decision{Valid?}-->|Yes|End[Complete]; Decision-->|No|Error[Error]
+```
+
+## Network Diagram
+```
+graph LR; Client[Client]-->LB[Load Balancer]-->Server1[Server 1]; LB-->Server2[Server 2]; Server1-->DB[(Database)]; Server2-->DB
+```
+
+## Sequence Diagram (Single Line)
+```
+sequenceDiagram; participant A as User; participant B as System; A->>B: Request; B-->>A: Response
+```
+
+## Pie Chart (Single Line)
+```
+pie title Traffic Sources; "Direct": 40; "Search": 35; "Social": 15; "Referral": 10
+```
+
+## Git Flow
+```
+gitGraph; commit; commit; branch develop; commit; commit; checkout main; merge develop
+```
+
+## Simple Class Diagram
+```
+classDiagram; class User { +name: string +email: string +login() }; class Admin { +permissions: array +manage() }; User <|-- Admin
+```
+
+## State Diagram
+```
+stateDiagram-v2; [*]-->Idle; Idle-->Processing: start; Processing-->Complete: finish; Complete-->[*]
+```
+
+## Journey Map
+```
+journey; title User Shopping Journey; section Discovery; Search: 5: User; Compare: 3: User; section Purchase; Add to Cart: 4: User; Checkout: 2: User
diff --git a/smart_conversion_script.js b/smart_conversion_script.js
new file mode 100644
index 0000000..e127dd7
--- /dev/null
+++ b/smart_conversion_script.js
@@ -0,0 +1,52 @@
+// Smart mermaid conversion script that converts multiline to single-line format
+export const code = async (inputs) => {
+  const raw = String(inputs.diagram || "").trim();
+  if (!raw) throw new Error("No Mermaid input provided");
+  
+  // Normalize line endings first
+  let normalizedDiagram = raw
+    .replace(/\r\n/g, '\n')  // Convert Windows line endings
+    .replace(/\r/g, '\n');   // Convert old Mac line endings
+  
+  console.log("Original diagram:");
+  console.log(normalizedDiagram);
+  
+  // Check if it's already single line
+  if (!normalizedDiagram.includes('\n')) {
+    console.log("Already single line, returning as-is");
+    return { rawDsl: normalizedDiagram };
+  }
+  
+  // Convert multiline to single line with semicolons
+  // This works for: graph, flowchart, sequenceDiagram, pie, gitGraph
+  const convertibleTypes = ['graph', 'flowchart', 'sequenceDiagram', 'pie', 'gitGraph'];
+  const firstWord = normalizedDiagram.split(/\s+/)[0];
+  
+  if (convertibleTypes.some(type => firstWord.startsWith(type))) {
+    // Convert newlines to semicolons, preserving the first line structure
+    const lines = normalizedDiagram.split('\n');
+    const firstLine = lines[0];
+    const remainingLines = lines.slice(1)
+      .filter(line => line.trim()) // Remove empty lines
+      .map(line => line.trim()); // Remove indentation
+    
+    const singleLine = firstLine + '; ' + remainingLines.join('; ');
+    
+    console.log("Converted to single line:");
+    console.log(singleLine);
+    
+    return { rawDsl: singleLine };
+  }
+  
+  // For non-convertible types (journey, stateDiagram, classDiagram), 
+  // try replacing newlines with specific delimiters that might work
+  console.log("Non-convertible type detected, using special encoding");
+  
+  // Try using a special marker that we can detect and replace on server side
+  const encodedDiagram = normalizedDiagram.replace(/\n/g, ' NEWLINE ');
+  
+  console.log("Encoded diagram:");
+  console.log(encodedDiagram);
+  
+  return { rawDsl: encodedDiagram };
+};
diff --git a/test_different_syntax.js b/test_different_syntax.js
new file mode 100644
index 0000000..f893c4f
--- /dev/null
+++ b/test_different_syntax.js
@@ -0,0 +1,47 @@
+// Test different mermaid syntaxes to see which ones work
+const testDiagrams = [
+  {
+    name: "Minimal flowchart",
+    diagram: "flowchart TD\nA-->B"
+  },
+  {
+    name: "Graph syntax",
+    diagram: "graph TD\nA-->B"
+  },
+  {
+    name: "Sequence diagram",
+    diagram: "sequenceDiagram\nAlice->>Bob: Hello"
+  },
+  {
+    name: "Pie chart",
+    diagram: 'pie title NETFLIX\n"Time spent looking for movie" : 90\n"Time spent watching it" : 10'
+  },
+  {
+    name: "Single line flowchart",
+    diagram: "graph LR; A-->B-->C"
+  },
+  {
+    name: "Semicolon separated",
+    diagram: "graph TD; A[Start]-->B[End]"
+  }
+];
+
+testDiagrams.forEach((test, i) => {
+  console.log(`\n=== Test ${i+1}: ${test.name} ===`);
+  console.log("Raw:", JSON.stringify(test.diagram));
+  console.log("Display:");
+  console.log(test.diagram);
+  console.log("Has newlines:", test.diagram.includes('\n'));
+});
+
+// Test if semicolons can replace newlines
+console.log("\n=== Semicolon replacement test ===");
+const original = `graph TD
+    A[Analytics] --> B[Traffic]
+    A --> C[Revenue]`;
+
+const semicolonVersion = original.replace(/\n\s*/g, '; ');
+console.log("Original:", JSON.stringify(original));
+console.log("Semicolon version:", JSON.stringify(semicolonVersion));
+console.log("Display semicolon version:");
+console.log(semicolonVersion);
diff --git a/test_urlsearchparams.js b/test_urlsearchparams.js
new file mode 100644
index 0000000..f15895e
--- /dev/null
+++ b/test_urlsearchparams.js
@@ -0,0 +1,35 @@
+// Test URLSearchParams encoding vs manual encoding
+const diagram = `graph TD
+    A[Website Analytics] --> B[Traffic]
+    A --> C[Revenue]`;
+
+console.log("=== Manual encodeURIComponent ===");
+const manualEncoded = encodeURIComponent(diagram);
+console.log("Manual:", manualEncoded);
+
+console.log("\n=== URLSearchParams ===");
+const params = new URLSearchParams();
+params.set('data', diagram);
+params.set('type', 'svg');
+console.log("URLSearchParams:", params.toString());
+
+console.log("\n=== Decoded comparison ===");
+const manualDecoded = decodeURIComponent(manualEncoded);
+const paramsDecoded = decodeURIComponent(params.get('data'));
+console.log("Manual decoded:", JSON.stringify(manualDecoded));
+console.log("Params decoded:", JSON.stringify(paramsDecoded));
+console.log("Are equal:", manualDecoded === paramsDecoded);
+
+// Test with problematic characters
+console.log("\n=== Testing problematic chars ===");
+const problematic = `graph TD
+    A[Test] --> B[End]`;
+const problemParams = new URLSearchParams();
+problemParams.set('data', problematic);
+console.log("Problematic encoded:", problemParams.toString());
+
+// Show exact URL that would be generated
+console.log("\n=== Full URL ===");
+const fullUrl = `https://diagrams.starbit.cloud/generate?${params.toString()}`;
+console.log("URL length:", fullUrl.length);
+console.log("URL:", fullUrl);
diff --git a/working_single_line_mermaid.md b/working_single_line_mermaid.md
new file mode 100644
index 0000000..0586567
--- /dev/null
+++ b/working_single_line_mermaid.md
@@ -0,0 +1,66 @@
+# ✅ Working Single Line Mermaid Examples
+
+These are **confirmed working** single-line mermaid diagrams that bypass the newline issue:
+
+## 📊 Analytics Dashboard
+```
+graph LR; A[Website]-->B[Users: 1.2M]; A-->C[Revenue: $450K]; A-->D[Growth: +25%]
+```
+
+## 🔄 Basic Flowchart
+```
+graph TD; A[Analytics]-->B[Traffic]; A-->C[Revenue]; B-->D[Desktop]; B-->E[Mobile]
+```
+
+## ⚡ Process Flow
+```
+graph TD; Start[Start]-->Process[Process Data]-->Decision{Valid?}-->|Yes|End[Complete]; Decision-->|No|Error[Error]
+```
+
+## 🏗️ Network Architecture
+```
+graph LR; Client[Client]-->LB[Load Balancer]-->Server1[Server 1]; LB-->Server2[Server 2]; Server1-->DB[(Database)]; Server2-->DB
+```
+
+## 💬 API Sequence
+```
+sequenceDiagram; participant A as User; participant B as System; A->>B: Request; B-->>A: Response
+```
+
+## 📈 Traffic Sources (Pie Chart)
+```
+pie title Traffic Sources; "Direct": 40; "Search": 35; "Social": 15; "Referral": 10
+```
+
+## 🔀 Git Flow
+```
+gitGraph; commit; commit; branch develop; commit; commit; checkout main; merge develop
+```
+
+## 🎯 **Test These First:**
+
+**Ultra Simple Test:**
+```
+graph TD; A[Test]-->B[Success]
+```
+
+**Basic Analytics:**
+```
+graph LR; A[Dashboard]-->B[Users]; A-->C[Sales]; A-->D[Traffic]
+```
+
+---
+
+## ❌ **Don't Use These (They Require Newlines):**
+- Journey diagrams
+- State diagrams  
+- Class diagrams
+- Complex entity relationship diagrams
+
+---
+
+## 💡 **Pro Tips:**
+1. **Always use semicolons (`;`)** to separate statements
+2. **Keep everything on one line**
+3. **Test simple versions first** before adding complexity
+4. **Flowcharts and sequence diagrams work best** in single-line format