diff --git a/apps/api/src/routes/pipeline.ts b/apps/api/src/routes/pipeline.ts
index a7650ada..f5d6f3d6 100644
--- a/apps/api/src/routes/pipeline.ts
+++ b/apps/api/src/routes/pipeline.ts
@@ -44,8 +44,8 @@ const pipelineDefinitionSchema = z.object({
 
 /** Schema for saving a pipeline. */
 const savePipelineSchema = z.object({
-  name: z.string().min(1, "Pipeline name is required").max(100),
-  description: z.string().max(500).optional(),
+  name: z.string().min(1, "Pipeline name is required").max(255),
+  description: z.string().max(2000).optional(),
   steps: z
     .array(pipelineStepSchema)
     .min(1, "Pipeline must have at least one step")
diff --git a/apps/api/src/routes/tools/border.ts b/apps/api/src/routes/tools/border.ts
index f1b327d9..1bb8ced5 100644
--- a/apps/api/src/routes/tools/border.ts
+++ b/apps/api/src/routes/tools/border.ts
@@ -6,13 +6,13 @@ import { createToolRoute } from "../tool-factory.js";
 const hexColor = z.string().regex(/^#[0-9a-fA-F]{6}$/);
 
 const settingsSchema = z.object({
-  borderWidth: z.number().min(0).max(200).default(10),
+  borderWidth: z.number().min(0).max(2000).default(10),
   borderColor: hexColor.default("#000000"),
   padding: z.number().min(0).max(200).default(0),
   paddingColor: hexColor.default("#FFFFFF"),
-  cornerRadius: z.number().min(0).max(500).default(0),
+  cornerRadius: z.number().min(0).max(2000).default(0),
   shadow: z.boolean().default(false),
-  shadowBlur: z.number().min(1).max(50).default(15),
+  shadowBlur: z.number().min(1).max(200).default(15),
   shadowOffsetX: z.number().min(-50).max(50).default(0),
   shadowOffsetY: z.number().min(-50).max(50).default(5),
   shadowColor: hexColor.default("#000000"),
diff --git a/apps/api/src/routes/tools/bulk-rename.ts b/apps/api/src/routes/tools/bulk-rename.ts
index fc092c3b..aebb3615 100644
--- a/apps/api/src/routes/tools/bulk-rename.ts
+++ b/apps/api/src/routes/tools/bulk-rename.ts
@@ -6,7 +6,7 @@ import { z } from "zod";
 import { formatZodErrors } from "../../lib/errors.js";
 
 const settingsSchema = z.object({
-  pattern: z.string().min(1).max(200).default("image-{{index}}"),
+  pattern: z.string().min(1).max(1000).default("image-{{index}}"),
   startIndex: z.number().min(0).default(1),
 });
 
diff --git a/apps/api/src/routes/tools/collage.ts b/apps/api/src/routes/tools/collage.ts
index 9127448d..feebe3cd 100644
--- a/apps/api/src/routes/tools/collage.ts
+++ b/apps/api/src/routes/tools/collage.ts
@@ -321,15 +321,15 @@ const cellSchema = z.object({
   imageIndex: z.number().int().min(0),
   panX: z.number().min(-100).max(100).default(0),
   panY: z.number().min(-100).max(100).default(0),
-  zoom: z.number().min(1).max(3).default(1),
+  zoom: z.number().min(1).max(10).default(1),
   objectFit: z.enum(["cover", "contain"]).default("cover"),
 });
 
 const settingsSchema = z.object({
   templateId: z.string(),
   cells: z.array(cellSchema).optional(),
-  gap: z.number().min(0).max(50).default(8),
-  cornerRadius: z.number().min(0).max(30).default(0),
+  gap: z.number().min(0).max(500).default(8),
+  cornerRadius: z.number().min(0).max(500).default(0),
   backgroundColor: z.string().default("#FFFFFF"),
   aspectRatio: z.string().default("free"),
   outputFormat: z.enum(["png", "jpeg", "webp"]).default("png"),
diff --git a/apps/api/src/routes/tools/gif-tools.ts b/apps/api/src/routes/tools/gif-tools.ts
index 3054bae7..e5d21b47 100644
--- a/apps/api/src/routes/tools/gif-tools.ts
+++ b/apps/api/src/routes/tools/gif-tools.ts
@@ -65,8 +65,8 @@ const settingsSchema = z.object({
   mode: z.enum(["resize", "optimize", "speed", "reverse", "extract", "rotate"]).default("resize"),
 
   // Resize
-  width: z.number().min(1).max(4096).optional(),
-  height: z.number().min(1).max(4096).optional(),
+  width: z.number().min(1).max(16384).optional(),
+  height: z.number().min(1).max(16384).optional(),
   percentage: z.number().min(1).max(500).optional(),
 
   // Optimize
diff --git a/apps/api/src/routes/tools/image-to-pdf.ts b/apps/api/src/routes/tools/image-to-pdf.ts
index c2b820fa..8bae3f5d 100644
--- a/apps/api/src/routes/tools/image-to-pdf.ts
+++ b/apps/api/src/routes/tools/image-to-pdf.ts
@@ -13,7 +13,7 @@ import { createWorkspace } from "../../lib/workspace.js";
 const settingsSchema = z.object({
   pageSize: z.enum(["A4", "Letter", "A3", "A5"]).default("A4"),
   orientation: z.enum(["portrait", "landscape"]).default("portrait"),
-  margin: z.number().min(0).max(100).default(20),
+  margin: z.number().min(0).max(500).default(20),
 });
 
 const PAGE_SIZES: Record<string, [number, number]> = {
diff --git a/apps/api/src/routes/tools/passport-photo.ts b/apps/api/src/routes/tools/passport-photo.ts
index efca7257..404ed8c4 100644
--- a/apps/api/src/routes/tools/passport-photo.ts
+++ b/apps/api/src/routes/tools/passport-photo.ts
@@ -36,7 +36,7 @@ const generateSettingsSchema = z.object({
   bgColor: z.string().default("#FFFFFF"),
   printLayout: z.string().default("none"),
   maxFileSizeKb: z.number().default(0),
-  dpi: z.number().min(72).max(600).default(300),
+  dpi: z.number().min(72).max(1200).default(300),
   customWidthMm: z.number().optional(),
   customHeightMm: z.number().optional(),
   zoom: z.number().min(0.5).max(3).default(1),
diff --git a/apps/api/src/routes/tools/pdf-to-image.ts b/apps/api/src/routes/tools/pdf-to-image.ts
index aa80ae55..b12a5038 100644
--- a/apps/api/src/routes/tools/pdf-to-image.ts
+++ b/apps/api/src/routes/tools/pdf-to-image.ts
@@ -14,7 +14,7 @@ import { createWorkspace } from "../../lib/workspace.js";
 // ── Settings schema ──────────────────────────────────────────────
 const settingsSchema = z.object({
   format: z.enum(["png", "jpg", "webp", "avif", "tiff", "gif", "heic", "heif"]).default("png"),
-  dpi: z.number().min(36).max(1200).default(150),
+  dpi: z.number().min(36).max(2400).default(150),
   quality: z.number().min(1).max(100).default(85),
   colorMode: z.enum(["color", "grayscale", "bw"]).default("color"),
   pages: z.string().default("all"),
diff --git a/apps/api/src/routes/tools/qr-generate.ts b/apps/api/src/routes/tools/qr-generate.ts
index b42245a4..eaf0a797 100644
--- a/apps/api/src/routes/tools/qr-generate.ts
+++ b/apps/api/src/routes/tools/qr-generate.ts
@@ -9,7 +9,7 @@ import { createWorkspace } from "../../lib/workspace.js";
 
 const settingsSchema = z.object({
   text: z.string().min(1).max(2000),
-  size: z.number().min(100).max(2000).default(400),
+  size: z.number().min(100).max(10000).default(400),
   errorCorrection: z.enum(["L", "M", "Q", "H"]).default("M"),
   foreground: z
     .string()
diff --git a/apps/api/src/routes/tools/sharpening.ts b/apps/api/src/routes/tools/sharpening.ts
index ddbbb113..ff044f06 100644
--- a/apps/api/src/routes/tools/sharpening.ts
+++ b/apps/api/src/routes/tools/sharpening.ts
@@ -15,7 +15,7 @@ const settingsSchema = z.object({
   y2: z.number().min(0).max(50).default(12),
   y3: z.number().min(0).max(50).default(20),
   // Unsharp Mask
-  amount: z.number().min(0).max(500).default(100),
+  amount: z.number().min(0).max(1000).default(100),
   radius: z.number().min(0.1).max(5).default(1.0),
   threshold: z.number().min(0).max(255).default(0),
   // High-Pass
diff --git a/apps/api/src/routes/tools/split.ts b/apps/api/src/routes/tools/split.ts
index e76fa40b..4d0d70a3 100644
--- a/apps/api/src/routes/tools/split.ts
+++ b/apps/api/src/routes/tools/split.ts
@@ -9,8 +9,8 @@ import { formatZodErrors } from "../../lib/errors.js";
 import { ensureSharpCompat } from "../../lib/heic-converter.js";
 
 const settingsSchema = z.object({
-  columns: z.number().min(1).max(20).default(3),
-  rows: z.number().min(1).max(20).default(3),
+  columns: z.number().min(1).max(100).default(3),
+  rows: z.number().min(1).max(100).default(3),
   tileWidth: z.number().min(10).optional(),
   tileHeight: z.number().min(10).optional(),
   outputFormat: z.enum(["original", "png", "jpg", "webp"]).default("original"),
@@ -89,8 +89,8 @@ export function registerSplit(app: FastifyInstance) {
         cols = Math.max(1, Math.ceil(fullW / settings.tileWidth));
         rows = Math.max(1, Math.ceil(fullH / settings.tileHeight));
       }
-      cols = Math.min(cols, 20);
-      rows = Math.min(rows, 20);
+      cols = Math.min(cols, 100);
+      rows = Math.min(rows, 100);
 
       const cellW = Math.floor(fullW / cols);
       const cellH = Math.floor(fullH / rows);
diff --git a/apps/api/src/routes/tools/stitch.ts b/apps/api/src/routes/tools/stitch.ts
index 788ccab0..98cc40d9 100644
--- a/apps/api/src/routes/tools/stitch.ts
+++ b/apps/api/src/routes/tools/stitch.ts
@@ -14,12 +14,12 @@ const MAX_CANVAS_PIXELS = 100_000_000;
 
 const settingsSchema = z.object({
   direction: z.enum(["horizontal", "vertical", "grid"]).default("horizontal"),
-  gridColumns: z.number().int().min(2).max(10).default(2),
+  gridColumns: z.number().int().min(2).max(100).default(2),
   resizeMode: z.enum(["fit", "original", "stretch", "crop"]).default("fit"),
   alignment: z.enum(["start", "center", "end"]).default("center"),
-  gap: z.number().min(0).max(200).default(0),
-  border: z.number().min(0).max(50).default(0),
-  cornerRadius: z.number().min(0).max(50).default(0),
+  gap: z.number().min(0).max(1000).default(0),
+  border: z.number().min(0).max(500).default(0),
+  cornerRadius: z.number().min(0).max(500).default(0),
   backgroundColor: z
     .string()
     .regex(/^#[0-9a-fA-F]{6}$/)
diff --git a/apps/api/src/routes/tools/svg-to-raster.ts b/apps/api/src/routes/tools/svg-to-raster.ts
index c4ae0cd1..f1814022 100644
--- a/apps/api/src/routes/tools/svg-to-raster.ts
+++ b/apps/api/src/routes/tools/svg-to-raster.ts
@@ -17,9 +17,9 @@ import { updateJobProgress } from "../progress.js";
 const NON_PREVIEWABLE = new Set(["tiff", "heif"]);
 
 const settingsSchema = z.object({
-  width: z.number().min(1).max(16384).optional(),
-  height: z.number().min(1).max(16384).optional(),
-  dpi: z.number().min(36).max(1200).default(300),
+  width: z.number().min(1).max(65536).optional(),
+  height: z.number().min(1).max(65536).optional(),
+  dpi: z.number().min(36).max(2400).default(300),
   quality: z.number().min(1).max(100).default(90),
   backgroundColor: z
     .string()
diff --git a/apps/api/src/routes/tools/vectorize.ts b/apps/api/src/routes/tools/vectorize.ts
index 581344bf..18939389 100644
--- a/apps/api/src/routes/tools/vectorize.ts
+++ b/apps/api/src/routes/tools/vectorize.ts
@@ -14,9 +14,9 @@ import { createWorkspace } from "../../lib/workspace.js";
 const settingsSchema = z.object({
   colorMode: z.enum(["bw", "color"]).default("bw"),
   threshold: z.number().min(0).max(255).default(128),
-  colorPrecision: z.number().min(1).max(8).default(6),
-  layerDifference: z.number().min(1).max(64).default(6),
-  filterSpeckle: z.number().min(1).max(128).default(4),
+  colorPrecision: z.number().min(1).max(16).default(6),
+  layerDifference: z.number().min(1).max(128).default(6),
+  filterSpeckle: z.number().min(1).max(256).default(4),
   pathMode: z.enum(["none", "polygon", "spline"]).default("spline"),
   cornerThreshold: z.number().min(0).max(180).default(60),
   invert: z.boolean().default(false),
diff --git a/apps/api/src/routes/tools/watermark-text.ts b/apps/api/src/routes/tools/watermark-text.ts
index b8c33916..a98fa014 100644
--- a/apps/api/src/routes/tools/watermark-text.ts
+++ b/apps/api/src/routes/tools/watermark-text.ts
@@ -5,7 +5,7 @@ import { createToolRoute } from "../tool-factory.js";
 
 const settingsSchema = z.object({
   text: z.string().min(1).max(500),
-  fontSize: z.number().min(8).max(200).default(48),
+  fontSize: z.number().min(8).max(1000).default(48),
   color: z
     .string()
     .regex(/^#[0-9a-fA-F]{6}$/)