贊助
PDF OCR 辨識
將掃描的 PDF 頁面轉換為可編輯、可搜尋的文字 — 從任何掃描文件、純影像 PDF 或頁面照片中擷取文字。整個過程在您的瀏覽器中本地執行。
OCR 準確率取決於影像品質。為獲得最佳效果,請使用 300 DPI 或更高的清晰掃描檔。手寫文字和藝術字體的辨識準確率可能較低。
將掃描的 PDF 拖到此處,或點擊選擇檔案
選擇 PDF 檔案
最大檔案大小:128 MB
所有處理在您的瀏覽器中本地完成。檔案永遠不會上傳。
多語言 PDF OCR — 一次性辨識混合語言
Got a PDF with English mixed with Spanish, French, German, or Chinese? Our multi-language OCR recognizes multiple scripts in a single document, producing a unified searchable PDF. No upload, no account, no daily limits — perfect for bilingual contracts, international reports, and academic papers.
100% FreeNo UploadNo Sign-upMulti-Language Engine
使用步驟
- Upload Your PDF: Drop the multi-language PDF in. Whether it's an English-Spanish legal contract, a Chinese-English academic paper, or a trilingual menu, our OCR handles mixed scripts in one pass.
- Select Languages: Pick all the languages present in your document. Common pairings like 'English + Spanish', 'English + Chinese (Simplified)', or 'English + French + German' are preconfigured. For unknown combos, select up to 4 languages manually.
- Run Multi-Language OCR: Click 'Start OCR'. Tesseract.js auto-detects script boundaries and runs the appropriate language model on each region of the page. Mixed-script pages process cleanly without manual page splitting.
- Download Searchable PDF: Save the output. It contains the original layout plus a unified text layer covering every detected script. Copy text from any paragraph — English, Spanish, Chinese characters all flow correctly to your clipboard.
為何選擇此工具
- 100% Local Processing: Files are processed entirely in your browser using JavaScript — never uploaded to any server.
- No Limits: No file count or file size restrictions. Process as many files as your device can handle.
- No Sign-up: Free forever, no account needed, no email required. Open the page and start.
- Private by Design: Nothing is sent to any server. Close the tab and your files are gone forever.
常見問題
Can OCR handle a PDF in multiple languages?
Yes. Our PDF OCR tool supports multi-language recognition in a single document. Configure the language set (e.g. 'English + Spanish') before running, and Tesseract.js will detect script boundaries and apply the right model to each text region. The output is a unified searchable PDF covering every language present.
What language combinations are supported?
We support any combination of the 100+ Tesseract.js languages, including: English + Spanish (LatAm contracts), English + Chinese Simplified (Chinese tech docs translated to English), English + French (Canadian government docs), English + Arabic (Middle East legal), Spanish + Portuguese (Latin America).
How accurate is multi-language OCR?
Accuracy is similar to single-language OCR for each script (95-98% for clean printed text). Mixed-script pages may see slightly lower accuracy at script boundaries (e.g. Chinese characters followed immediately by Latin text). Use higher scan DPI for better boundary recognition.
Will my multilingual PDF be uploaded?
No — all OCR runs in your browser via Tesseract.js WebAssembly. Whether your document is a confidential bilingual contract, proprietary academic paper, or internal corporate memo, the file never leaves your device.
How do I extract text from a Chinese-English PDF?
Open our PDF OCR tool, upload your PDF, select 'English + Chinese (Simplified)' from the language picker (or 'English + Chinese (Traditional)' for Taiwan/Hong Kong), then click 'Start OCR'. The output preserves all Chinese and English characters in a unified text layer.
Is the output searchable for Ctrl+F?
Yes — once OCR completes, open the output PDF in any reader and Ctrl+F searches the text layer. Searches match across language boundaries (e.g. you can find English words even on pages that mostly contain Chinese).