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GlyphGrab — support

Capture a region or full scrolling page, read an image or visible video frame, or import images and PDF pages. English and Vietnamese OCR runs locally. GlyphGrab is free and needs no account or API key.

Capture text from a page

  1. Open a normal web page and click the GlyphGrab toolbar icon. If it is hidden, open Chrome’s Extensions menu and pin GlyphGrab.
  2. Drag around the text for a region capture, or choose Full page in the capture bar to collect a scrolling page.
  3. Choose English, Vietnamese or mixed recognition. Compare the source image with the editable text, then copy, clean or export it.

Region shortcut: ⌘ Shift U on macOS or Ctrl Shift U on Windows/Linux. If another app uses it, change the assignment at chrome://extensions/shortcuts.

Read an image or video frame

Right-click an image and choose OCR this image, or right-click a video and choose OCR visible video frame. GlyphGrab first tries to read the selected pixels directly. When a cross-origin image or video prevents direct canvas access, it uses the visible displayed region from the current tab. Only the visible frame is captured; GlyphGrab does not download a media URL in the background.

Import images and PDFs

Open the workspace from a result, or use ⌘ Shift O / Ctrl Shift O. Add images or a local PDF, choose up to 50 pages, and render those pages into the OCR queue. Encrypted PDFs prompt for a password; the password is used only in memory and is not saved. PDF and image processing use code bundled inside the extension.

A PDF must be at most 50 MiB. Each rendered page is limited to 12 megapixels and one import to 120 megapixels. These bounds prevent a damaged or unusually large document from exhausting browser memory.

Batch, clean and export

Crop, rotate or adjust contrast, recognize the queue, and export TXT, Markdown or ZIP. The result panel can find literal text, move between matches, replace one or all matches, undo a bulk replacement, normalize spaces, join OCR hyphenated line breaks, trim lines and remove blank lines. These edits stay on your device.

Common questions

Why is some text incorrect?

OCR is not perfect. Use clear, larger text, select a tight region, choose the matching language and try crop, rotation or contrast. Complex layouts, handwriting and blurred or stylized text can produce errors. Check important values against the source.

Why did full-page capture stop?

GlyphGrab stops instead of silently cutting off a page when the result would exceed 32 megapixels, 16,384 pixels in height or 32 viewport tiles. It also stops if the tab navigates or the viewport changes during capture. The original scroll position and temporary page presentation changes are restored after success, cancellation or an error.

Why can’t I capture this page?

Chrome protects internal pages, Chrome Web Store pages and some browser surfaces. Open a regular web page or import a local image or PDF into the workspace. Local file pages may also require “Allow access to file URLs” in Chrome’s extension settings.

Does OCR work offline?

Yes. OCR workers, WebAssembly code, PDF renderer and English/Vietnamese models are bundled in the extension. Open your source page before disconnecting, or add a local image or PDF; GlyphGrab does not send documents to an OCR service.

Where is my data?

Settings and optional history stay in the Chrome profile. Temporary capture tiles, PDF passwords and text-tool undo snapshots are not retained as account or cloud data. Delete records or clear history inside GlyphGrab. Export anything you need before removing the extension or deleting the browser profile.

Do I need to pay or register?

No. All shipped GlyphGrab features are free and require no account.

Contact

Email [email protected]. Include your Chrome version, operating system, GlyphGrab version, steps and the exact error message. Send a non-sensitive sample only if needed; do not send passwords, identification documents, private conversations or financial records.

Hỗ trợ tiếng Việt

Bấm biểu tượng GlyphGrab để kéo chọn vùng chữ hoặc chọn Toàn trang. Bạn cũng có thể bấm chuột phải vào ảnh/khung hình video, hoặc nhập ảnh và PDF trong không gian làm việc. Tiện ích hỗ trợ OCR tiếng Việt, tiếng Anh và chế độ kết hợp; chạy trên máy, miễn phí và không cần tài khoản.

Nếu kết quả sai, hãy thử ảnh rõ hơn, chọn đúng ngôn ngữ hoặc chỉnh cắt, xoay và tương phản. PDF tối đa 50 MiB và 50 trang được chọn. Chụp toàn trang dừng rõ ràng khi vượt giới hạn an toàn; tiện ích khôi phục vị trí cuộn sau khi hoàn tất hoặc gặp lỗi.

Nếu cần trợ giúp, gửi email tới [email protected], kèm phiên bản Chrome và các bước gặp lỗi. Không gửi dữ liệu nhạy cảm.

Privacy

Read the GlyphGrab privacy policy / Chính sách quyền riêng tư.