v1.2.0

Highlights

Four new thumbnail-cache formats: Windows Explorer thumbcache_*.db, PhotoScape photothumb.db, PNG-payload hashed Thumbs.db, and faithful color for Windows XP abbreviated-JPEG thumbnails.

Changes

Added

• Windows Explorer thumbnail cache (thumbcache_*.db) support: reads the flat CMMM container across its layout versions, decoding JPEG, PNG, and raw BGRA thumbnails; refuses the IMMM index and carves orphaned entries as recovered.
• PhotoScape SQLite cache (photothumb.db) support: opens the SQLite-3 thumbnail database directly (not an OLE2 container) and extracts its stored JPEGs.
• PNG-payload hashed Thumbs.db (hashed-png) support: hashed-layout databases whose thumbnails are PNG rather than JPEG.
• Faithful color for Windows XP abbreviated-JPEG (abbrev-jpeg) thumbnails: reconstructs the headerless JPEG and decodes the 4-component payload with correct colors instead of a mangled image.
• Help menu with keyboard access and accelerators in the menubar.
• Table view: resizable / auto-fit columns and a file-order number column.

Changed

• Thumbnails now render through a thumb:// protocol so large databases stay responsive.

Fixed

• Recover thumbnails when the container is only half-read from a damaged file.
• Reset scroll position on open; responsive preview toolbar; grid label clipping.

---

NOTE: builds are unsigned. First run:

• Windows: More info → Run anyway
• macOS: the build is unsigned, so macOS reports it as "damaged". After dragging Thumbscope to Applications, clear the quarantine flag:

  xattr -dr com.apple.quarantine /Applications/Thumbscope.app
  

  (Sequoia removed the right-click → Open bypass, and no "Open Anyway" button appears for unsigned apps - the command above is the fix.)

More install detail in README → Installation.

v1.1.0

Changes

Added

• macOS (Apple Silicon / arm64) build: unsigned .dmg and .zip via npm run dist:mac.
• macOS thumbscope CLI launcher bundled in the app; symlink it onto your PATH to use the CLI from a terminal.
• Release CI now builds and publishes Windows and macOS artifacts together on tagged releases; manual workflow runs produce downloadable build artifacts without publishing.

Notes

• macOS builds are unsigned/un-notarized - on first launch use right-click -> Open (or xattr -dr com.apple.quarantine /Applications/Thumbscope.app). Intel (x64) Macs are not supported yet.

---

NOTE: builds are unsigned. On first run (details in README → Installation):

• Windows: More info → Run anyway
• macOS: right-click → Open

v1.0.0

Highlights

First public release.

Changes

Added

• Desktop (GUI) app to open, browse, and export thumbnails from proprietary thumbnail-cache databases.
• Supported formats: classic Thumbs.db (Windows 2000 / XP), modern Thumbs.db (Windows Vista / 7), ehthumbs.db, and IrfanView ivThumbs.db (flat + nested).
• Two-pane browsing (thumbnail grid or list) with a larger preview; images load lazily for large databases.
• Export to a folder as JPEG - stored original or resized/upscaled - with optional CSV metadata.
• Recovery fallback: carves raw JPEGs from truncated or partly-corrupt containers.
• thumbscope CLI with list and export commands.
• Windows NSIS installer with optional context-menu entries and an optional thumbscope CLI on PATH.

---

NOTE: builds are unsigned. On first run (details in README → Installation):

• Windows: More info → Run anyway