SecureToolsProject · maruson08 · Aug 24, 2026 · Aug 24, 2026 · Aug 24, 2026 · Aug 24, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,8 +1,21 @@
 # Changelog
 
+## Unreleased
+
+### Added
+
+- Started the v2 cycle with a production Image category and local Image Converter.
+- Added JPEG, PNG, and WebP input/output, lossy quality controls for JPEG/WebP, deterministic white JPEG transparency, metadata-stripping canvas re-encoding, collision-safe Unicode names, and ZIP batch output.
+- Added per-file, queue, dimension, decoded-pixel, and 200-megapixel aggregate-work protections with recoverable errors.
+
+### Changed
+
+- Removed the standalone planned Rotate PDF card; page rotation remains available as part of PDF Organizer.
+- Moved shared browser image validation and decoding into `tools/shared/image.js` for PDF and Image tools.
+
 ## 1.0.0
 
-This section describes the planned v1.0.0 release candidate. The Git tag and GitHub release are intentionally separate release-manager actions and are not created by Sprint 11.
+Secure Tools v1.0.0 was published on 2026-08-24 after the Sprint 11 release-candidate hardening and manual release process.
 
 ### PDF tools
 

diff --git a/README.md b/README.md
@@ -4,10 +4,11 @@ Secure Tools is a privacy-first web hub for everyday file utilities. Production
 
 The project uses a category-first architecture, a Pull Request/main CI gate, and static GitHub Pages deployment.
 
-Release-candidate context is recorded in the [v1.0.0 changelog](./CHANGELOG.md) and [release QA checklist](./docs/release-qa.md). The v1.0.0 Git tag and GitHub release are deliberate release-manager actions after manual sign-off; Sprint 11 does not create them.
+The v1 baseline is recorded in the [changelog](./CHANGELOG.md) and historical [v1.0.0 release QA checklist](./docs/release-qa.md). Sprint 12 begins the v2 cycle by expanding production tools into the Image category.
 
 ## Available tools
 
+- [Image Converter](./tools/image/converter/) — convert batches of JPEG, PNG, and WebP images locally with predictable names and ZIP output.
 - [Images to PDF](./tools/pdf/images-to-pdf/) — arrange JPEG, PNG, and WebP images and save them as one PDF.
 - [Merge PDF](./tools/pdf/merge/) — validate, order, and combine PDF pages without rasterizing them.
 - [Split PDF](./tools/pdf/split/) — extract ordered page ranges or create predictable per-page and fixed-interval archives.
@@ -75,6 +76,7 @@ The hub is a static site built with semantic HTML, CSS, and Vanilla JavaScript E
 ├── tools/
 │   ├── shared/
 │   │   ├── file.js
+│   │   ├── image.js
 │   │   ├── pdf.js
 │   │   ├── tool.css
 │   │   └── save.js
@@ -87,6 +89,8 @@ The hub is a static site built with semantic HTML, CSS, and Vanilla JavaScript E
 │   │   ├── to-images/
 │   │   └── metadata/
 │   ├── image/
+│   │   ├── index.html
+│   │   └── converter/
 │   ├── privacy/
 │   ├── scan/
 │   ├── media/
@@ -101,6 +105,7 @@ The hub is a static site built with semantic HTML, CSS, and Vanilla JavaScript E
     ├── ci-foundation.test.mjs
     ├── home-structure.test.mjs
     ├── image-to-pdf.test.mjs
+    ├── image-converter.test.mjs
     ├── pdf-merge-and-categories.test.mjs
     ├── pdf-split.test.mjs
     ├── pdf-metadata.test.mjs
@@ -124,12 +129,26 @@ Categories are the stable navigation layer. Individual utilities can be added be
 
 `/tools/image-to-pdf/` is a lightweight static migration page with a meta refresh and visible fallback link to `/tools/pdf/images-to-pdf/`. It does not use JavaScript to redirect.
 
+## Image Converter
+
+Image Converter is available at `/tools/image/converter/`.
+
+- Accepts signature-validated JPEG, PNG, and WebP files and converts one or many sources sequentially with browser-native decode, canvas, and encode APIs.
+- Supports JPEG, PNG, and WebP output. JPEG and WebP expose a 50–100% lossy quality control; PNG hides that irrelevant setting.
+- Uses explicit browser orientation handling so normally displayed camera images are rendered in their intended orientation.
+- Flattens transparent pixels onto white for JPEG while PNG and WebP keep the canvas alpha channel.
+- Canvas re-encoding does not preserve EXIF or other embedded image metadata. The tool intentionally makes no configurable metadata-cleaning or preservation claim.
+- Replaces supported source extensions, preserves Unicode, limits output bases to 120 characters and 180 UTF-8 bytes, and adds deterministic suffixes for collisions.
+- Saves one converted image directly or packages multiple outputs into `converted_images.zip` with the existing same-origin JSZip build.
+- Reuses the existing 50 MiB file, 100-file queue, 500 MiB queue, 16,384-pixel dimension, and 50-megapixel per-image limits, plus a 200-megapixel aggregate decoded-work limit per conversion.
+- Keeps queued sources available after cancellation or recoverable decode, encode, archive, and save failures so the job can be retried without reloading.
+
 ## Images to PDF
 
 Images to PDF is available at `/tools/pdf/images-to-pdf/`.
 
 - `app.js` manages picker/drop input, duplicate-preserving queue state, ordering, removal, settings, progress, and save behavior.
-- `image.js` validates and decodes JPEG, PNG, and WebP using browser-local APIs.
+- `tools/shared/image.js` validates and decodes JPEG, PNG, and WebP using browser-local APIs shared with Image Converter.
 - `pdf.js` owns page geometry, image placement, sequential preparation, and jsPDF generation.
 - Preview object URLs and temporary download URLs are revoked when no longer needed.
 - File admission validates JPEG, PNG, and WebP signatures before browser decoding; a supported signature may override a misleading MIME type or extension.
@@ -234,7 +253,7 @@ All processing libraries are pinned and served as same-origin static files. Prod
 ### JSZip
 
 - Version: `3.10.1`
-- Purpose: local multi-file PDF Split and PDF to Images archives
+- Purpose: local multi-file Image Converter, PDF Split, and PDF to Images archives
 - Package: `jszip@3.10.1` from npm
 - License choice: MIT
 - Details and hashes: [assets/vendor/jszip/README.md](./assets/vendor/jszip/README.md)
@@ -266,7 +285,7 @@ Run the complete local and CI validation entry point with:
 node tests/run-all.mjs
 ```
 
-It checks JavaScript syntax and runs Images to PDF, PDF Merge, PDF Split, PDF Organizer, PDF to Images, PDF Metadata, category-first homepage, system typography, CJK wrapping, long-copy layout, six-language catalog parity and placeholders, locale detection and persistence, static resource, privacy/network, security-hardening, dependency-integrity, save-path, ZIP, and CI workflow regression coverage. PDF fixtures are generated deterministically during tests; CI never processes real user files.
+It checks JavaScript syntax and runs Image Converter, Images to PDF, PDF Merge, PDF Split, PDF Organizer, PDF to Images, PDF Metadata, category-first homepage, system typography, CJK wrapping, long-copy layout, six-language catalog parity and placeholders, locale detection and persistence, static resource, privacy/network, security-hardening, dependency-integrity, save-path, ZIP, and CI workflow regression coverage. Test fixtures are generated deterministically; CI never processes real user files.
 
 ## Production security controls
 
@@ -325,8 +344,8 @@ Production routes load only same-origin HTML, CSS, JavaScript, and vendored libr
 The historical prototype is absent from the deployed tree. External URLs in documentation, licenses, and source links are informational or user-initiated; no production processing dependency is fetched remotely.
 ## Deferred work
 
-- PDF rotate, compression, and encryption tools
-- Image conversion, compression, and resizing
+- Broader PDF modification, compression, and encryption workflows
+- Image resizing, compression, and dedicated metadata inspection/cleaning
 - Broader XMP and structural PDF metadata sanitization
 - Scan/OCR and media tools
 - Offline/PWA support

diff --git a/js/locales/de.js b/js/locales/de.js
@@ -40,6 +40,10 @@ export const de = {
       "title": "PDF Metadata Inspector & Cleaner – Secure Tools",
       "description": "Überprüfen und entfernen Sie unterstützte PDF-Metadaten lokal in Ihrem Browser."
     },
+    "imageConverter": {
+      "title": "Bildkonverter – Secure Tools",
+      "description": "Konvertieren Sie JPEG-, PNG- und WebP-Bilder lokal in Ihrem Browser."
+    },
     "pdfCategory": {
       "title": "PDF-Tools – Secure Tools",
       "description": "Erstellen und organisieren Sie PDF-Dokumente lokal in Ihrem Browser."
@@ -140,8 +144,6 @@ export const de = {
       "imagesToPdf": "Ordnen Sie JPEG-, PNG- und WebP-Bilder in einem PDF an.",
       "merge": "Kombinieren Sie PDF-Dateien in der von Ihnen gewählten Reihenfolge.",
       "split": "Extrahieren Sie ausgewählte Seiten oder teilen Sie ein Dokument in lokale Dateien auf.",
-      "rotateTitle": "PDF drehen",
-      "rotate": "Korrigieren Sie die Seitenausrichtung, ohne die Dokumentqualität zu verändern.",
       "organize": "Sehen Sie sich eine Vorschau an, ordnen Sie sie neu an, drehen Sie sie und entfernen Sie Seiten aus einer PDF-Datei.",
       "toImages": "Konvertieren Sie geordnete PDF-Seiten in PNG-, JPEG- oder WebP-Bilder.",
       "metadata": "Überprüfen Sie allgemeine Dokumentmetadaten und erstellen Sie eine verifizierte, bereinigte Kopie."
@@ -383,6 +385,45 @@ export const de = {
       "save": "Der Speicherort konnte nicht geöffnet werden. Bitte versuchen Sie es erneut."
     }
   },
+  "imageConverter": {
+    "eyebrow": "Bildtool",
+    "title": "Bildkonverter",
+    "description": "Konvertieren Sie JPEG-, PNG- und WebP-Bilder lokal. Mehrere Dateien werden gemeinsam als ZIP gespeichert.",
+    "queue": { "meta": "{size} · Eintrag {position}" },
+    "settings": {
+      "title": "Konvertierungseinstellungen",
+      "format": "Ausgabeformat",
+      "jpeg": "JPEG",
+      "png": "PNG",
+      "webp": "WebP",
+      "quality": "Qualität",
+      "qualityHelp": "JPEG und WebP verwenden verlustbehaftete Qualität. PNG verwendet diese Einstellung nicht.",
+      "outputHelp": "Transparente Pixel werden in JPEG weiß. Die erneute Canvas-Kodierung entfernt eingebettete Bildmetadaten aus jeder Ausgabe.",
+      "imageFile": "Konvertiertes Bild",
+      "zipFile": "ZIP-Archiv"
+    },
+    "actions": { "convert": "Konvertieren und speichern" },
+    "status": {
+      "converting": "Bilder werden lokal konvertiert…",
+      "progress": "Bild {completed} von {total} wird konvertiert…",
+      "progressLabel": "Fortschritt der Bildkonvertierung",
+      "archive": "ZIP-Archiv wird vorbereitet…",
+      "saved": "{name} mit {count} konvertierten Bildern wurde gespeichert.",
+      "downloaded": "{name} mit {count} konvertierten Bildern wurde heruntergeladen.",
+      "saveCancelled": "Speichern abgebrochen. Es wurde keine Datei geschrieben."
+    },
+    "errors": {
+      "noFiles": "Fügen Sie vor der Konvertierung mindestens ein Bild hinzu.",
+      "format": "Wählen Sie JPEG, PNG oder WebP.",
+      "jobPixels": "Dieser Stapel überschreitet das kombinierte Limit von 200 Megapixeln für dekodierte Bilder. Konvertieren Sie weniger Bilder gleichzeitig.",
+      "canvas": "Dieser Browser kann die Bildzeichenfläche nicht erstellen.",
+      "encoder": "{name} konnte nicht in das ausgewählte Format kodiert werden.",
+      "archiveLibrary": "Die lokale Archivbibliothek konnte nicht geladen werden.",
+      "archive": "Das ZIP-Archiv konnte nicht erstellt werden.",
+      "failure": "{name} konnte nicht konvertiert werden. Das Bild ist möglicherweise beschädigt oder wird von diesem Browser nicht unterstützt.",
+      "save": "Der Speicherort konnte nicht geöffnet werden. Bitte versuchen Sie es erneut."
+    }
+  },
   "imageToPdf": {
     "eyebrow": "Bildtool",
     "title": "Bilder in PDF",

diff --git a/js/locales/en.js b/js/locales/en.js
@@ -10,6 +10,7 @@ export const en = {
     organizePdf: { title: "Organize PDF — Secure Tools", description: "Reorder, rotate, and remove PDF pages locally in your browser." },
     pdfToImages: { title: "PDF to Images — Secure Tools", description: "Convert PDF pages to PNG, JPEG, or WebP images locally in your browser." },
     pdfMetadata: { title: "PDF Metadata Inspector & Cleaner — Secure Tools", description: "Inspect and remove supported PDF metadata locally in your browser." },
+    imageConverter: { title: "Image Converter — Secure Tools", description: "Convert JPEG, PNG, and WebP images locally in your browser." },
     pdfCategory: { title: "PDF tools — Secure Tools", description: "Create and organize PDF documents locally in your browser." },
     imageCategory: { title: "Image tools — Secure Tools", description: "Private image tools designed to run locally in your browser." },
     privacyCategory: { title: "Privacy tools — Secure Tools", description: "Inspect and remove hidden file details without uploading the source file." },
@@ -46,7 +47,7 @@ export const en = {
     pdf: {
       title: "PDF tools", description: "Create and organize PDF documents locally, without uploading private files.",
       imagesToPdf: "Arrange JPEG, PNG, and WebP images into one PDF.", merge: "Combine PDF files in the order you choose.",
-      split: "Extract selected pages or divide a document into local files.", rotateTitle: "Rotate PDF", rotate: "Correct page orientation without changing document quality.",
+      split: "Extract selected pages or divide a document into local files.",
       organize: "Preview, reorder, rotate, and remove pages from one PDF.",
       toImages: "Convert ordered PDF pages to PNG, JPEG, or WebP images.",
       metadata: "Inspect common document metadata and create a verified cleaned copy.",
@@ -154,6 +155,29 @@ export const en = {
       library: "The local PDF library could not be loaded.", generation: "The PDF could not be merged. Try fewer or smaller files.", save: "The save location could not be opened. Please try again.",
     },
   },
+  imageConverter: {
+    eyebrow: "Image tool", title: "Image Converter", description: "Convert JPEG, PNG, and WebP images locally. Multiple files are saved together as one ZIP archive.",
+    queue: { meta: "{size} · item {position}" },
+    settings: {
+      title: "Conversion settings", format: "Output format", jpeg: "JPEG", png: "PNG", webp: "WebP", quality: "Quality",
+      qualityHelp: "JPEG and WebP use lossy quality. PNG does not use this setting.",
+      outputHelp: "Transparent pixels become white in JPEG. Canvas re-encoding removes embedded image metadata from every output.",
+      imageFile: "Converted image", zipFile: "ZIP archive",
+    },
+    actions: { convert: "Convert and save" },
+    status: {
+      converting: "Converting images locally…", progress: "Converting image {completed} of {total}…", progressLabel: "Image conversion progress",
+      archive: "Preparing the ZIP archive…", saved: "Saved {name} with {count} converted image(s).", downloaded: "Downloaded {name} with {count} converted image(s).",
+      saveCancelled: "Save cancelled. No file was written.",
+    },
+    errors: {
+      noFiles: "Add at least one image before converting.", format: "Choose JPEG, PNG, or WebP.",
+      jobPixels: "This batch exceeds the 200 megapixel combined decoded-work limit. Convert fewer images at once.",
+      canvas: "This browser cannot create the image canvas.", encoder: "{name} could not be encoded in the selected format.",
+      archiveLibrary: "The local archive library could not be loaded.", archive: "The ZIP archive could not be created.",
+      failure: "{name} could not be converted. The image may be damaged or unsupported by this browser.", save: "The save location could not be opened. Please try again.",
+    },
+  },
   imageToPdf: {
     eyebrow: "Image tool", title: "Images to PDF",
     description: "Arrange JPEG, PNG, and WebP images and save them as one PDF. Everything happens on this device.",

diff --git a/js/locales/es.js b/js/locales/es.js
@@ -40,6 +40,10 @@ export const es = {
       "title": "Metadatos del PDF — Secure Tools",
       "description": "Inspeccione y elimine metadatos PDF compatibles localmente en su navegador."
     },
+    "imageConverter": {
+      "title": "Convertidor de imágenes — Secure Tools",
+      "description": "Convierta imágenes JPEG, PNG y WebP localmente en su navegador."
+    },
     "pdfCategory": {
       "title": "Herramientas PDF — Secure Tools",
       "description": "Cree y organice documentos PDF localmente en su navegador."
@@ -140,8 +144,6 @@ export const es = {
       "imagesToPdf": "Organice imágenes JPEG, PNG y WebP en un PDF.",
       "merge": "Combina archivos PDF en el orden que elijas.",
       "split": "Extrae páginas seleccionadas o divide un documento en archivos locales.",
-      "rotateTitle": "Girar PDF",
-      "rotate": "Orientación correcta de la página sin cambiar la calidad del documento.",
       "organize": "Obtenga una vista previa, reordene, rote y elimine páginas de un PDF.",
       "toImages": "Convierte páginas PDF ordenadas a imágenes PNG, JPEG o WebP.",
       "metadata": "Inspecciona los metadatos de documentos comunes y crea una copia limpia verificada."
@@ -383,6 +385,45 @@ export const es = {
       "save": "No se pudo abrir la ubicación para guardar. Inténtelo de nuevo."
     }
   },
+  "imageConverter": {
+    "eyebrow": "Herramienta de imagen",
+    "title": "Convertidor de imágenes",
+    "description": "Convierta imágenes JPEG, PNG y WebP localmente. Varios archivos se guardan juntos en un único ZIP.",
+    "queue": { "meta": "{size} · elemento {position}" },
+    "settings": {
+      "title": "Ajustes de conversión",
+      "format": "Formato de salida",
+      "jpeg": "JPEG",
+      "png": "PNG",
+      "webp": "WebP",
+      "quality": "Calidad",
+      "qualityHelp": "JPEG y WebP usan calidad con pérdida. PNG no utiliza este ajuste.",
+      "outputHelp": "Los píxeles transparentes se vuelven blancos en JPEG. La recodificación con canvas elimina los metadatos de imagen de cada salida.",
+      "imageFile": "Imagen convertida",
+      "zipFile": "Archivo ZIP"
+    },
+    "actions": { "convert": "Convertir y guardar" },
+    "status": {
+      "converting": "Convirtiendo imágenes localmente…",
+      "progress": "Convirtiendo imagen {completed} de {total}…",
+      "progressLabel": "Progreso de conversión de imágenes",
+      "archive": "Preparando el archivo ZIP…",
+      "saved": "Se guardó {name} con {count} imagen(es) convertida(s).",
+      "downloaded": "Se descargó {name} con {count} imagen(es) convertida(s).",
+      "saveCancelled": "Guardado cancelado. No se escribió ningún archivo."
+    },
+    "errors": {
+      "noFiles": "Añada al menos una imagen antes de convertir.",
+      "format": "Elija JPEG, PNG o WebP.",
+      "jobPixels": "Este lote supera el límite combinado de 200 megapíxeles decodificados. Convierta menos imágenes a la vez.",
+      "canvas": "Este navegador no puede crear el lienzo de imagen.",
+      "encoder": "No se pudo codificar {name} en el formato seleccionado.",
+      "archiveLibrary": "No se pudo cargar la biblioteca de archivos local.",
+      "archive": "No se pudo crear el archivo ZIP.",
+      "failure": "No se pudo convertir {name}. La imagen puede estar dañada o no ser compatible con este navegador.",
+      "save": "No se pudo abrir la ubicación para guardar. Inténtelo de nuevo."
+    }
+  },
   "imageToPdf": {
     "eyebrow": "Herramienta de imagen",
     "title": "Imágenes a PDF",