Photo EXIF Util

About

Photo EXIF Util is a privacy-first Chrome extension that lets you inspect,
strip, and optimize image metadata entirely on your own device. No image
bytes, EXIF fields, or analytics are ever sent to a server.

WHY USE IT
- Photos taken on smartphones and modern cameras embed location, device
  serial numbers, lens IDs, and timestamps in EXIF metadata. Sharing such
  images on social platforms can expose your home, daily routine, or
  equipment.
- Built-in OS tools strip metadata silently and indiscriminately.
  Photo EXIF Util shows you exactly what is there, why it matters, and
  lets you remove only what you choose.

THREE TABS

1. Inspect
   Drop a JPEG / PNG / WebP file or paste an image URL. The side panel
   reveals every EXIF field with a privacy-risk badge (High / Medium /
   Low / None). A search box and category filter help you scan large tag
   sets quickly. GPS presence and "highest risk" are surfaced at the top.

2. Strip
   Choose categories to remove (GPS, Device, Lens, Capture settings,
   Date / Time, Software, Orientation). ICC color profiles can be kept
   to preserve color accuracy. The cleaned image is regenerated locally
   and offered as a download.

3. Optimize
   Resize and re-encode for SNS targets — 11 presets cover X (Twitter)
   Post / Card, Instagram Square / Portrait / Story, Threads, LINE Talk
   / Timeline, Bluesky, Facebook, plus a Custom mode. Quality is
   adjustable, and the tool searches for the highest quality that still
   meets the platform's file-size cap.

PRIVACY GUARANTEE
- Pure client-side processing using OffscreenCanvas, the Web Crypto API,
  and pica for resizing. No external services involved.
- Network requests happen only when you explicitly type / right-click a
  URL. Drag-and-drop and the file picker never touch the network.
- All Background Service Worker fetches use `redirect: 'manual'` and
  reject requests to private / loopback / link-local IP addresses to
  prevent SSRF.
- Content Security Policy locks `script-src` and `object-src` to
  `'self'`. No remote code execution.
- Open source on GitHub. Reproducible builds: see the repository.

ACCESSIBILITY & UX
- Light / Dark / system-preference theme.
- Localized in English and Japanese (chrome.i18n).
- WAI-ARIA tab pattern, keyboard-navigable side panel.
- Keyboard shortcut Ctrl+Shift+E (⌘+Shift+E on macOS) to open.

SUPPORTED FORMATS
JPEG, PNG, WebP. Files up to 50 MB.

OPEN SOURCE
github.com/mkontani/photo-exif-util — MIT-licensed.