使用结果前如何检查？
先尝试在原 PDF 中选中一个词。如果页面只是扫描图片，本工具无法识别文字：它提取 PDF 中已有的文字对象，不执行 OCR。多栏排版的阅读顺序可能需要手工整理。
Extract Text from PDF可以处理什么？
Extract Text from PDF 用于在浏览器中检查数据，并清楚显示处理结果和限制。 已核对的功能： Page-by-page extraction, Selectable text, Copy-ready output, Explicit no-OCR boundary.
Text extraction and OCR are different operations
Use extraction when you can already select text in a PDF viewer. Use OCR for scans and photographed documents, then review the recognized text because OCR can introduce character errors.
如何使用？
- Open a PDF that contains selectable text and select Process.
- Review the output separated by --- Page N --- markers.
- Copy the text or download a .txt file; verify reading order for columns and complex layouts.
实际输入输出示例
Extract one page with a text layer
输入
One-page PDF whose selectable text is: Invoice 1042输出
--- Page 1 ---
Invoice 1042The extractor joins text items already stored in the PDF; it does not recognize letters from pixels.
常见错误与修复方法
| 现象 | 可能原因 | 修复方法 |
|---|---|---|
| A scanned page produces an empty page marker. | The page contains only an image and no selectable text layer. | Use OCR software; converting the page to an image does not create searchable text. |
| Words appear in an unexpected order. | PDF stores positioned text items rather than a guaranteed semantic reading sequence. | Review multi-column, table, and bidirectional text against the rendered page. |
Important behavior of PDF Text Extractor
该工具的实际边界： Scanned PDFs contain pixels rather than selectable text and require OCR, which this page does not claim to perform.
标准与实现参考
- Mozilla PDF.js documentation (opens in a new tab)Documents the PDF parser and text-content API used by this page.
关于PDF Text Extractor的常见问题
Does the PDF Text Extractor upload my input?
No. Processing runs in the current browser tab, and the page does not send tool input to a KitLumi processing endpoint.
What input does the PDF Text Extractor accept?
It accepts one PDF with a text layer. The workspace checks the input and reports malformed or unsupported values before it produces a result.
What does the PDF Text Extractor produce?
It produces plain text separated by page markers. Copy and download controls appear when the output format supports them.
What limitation should I know?
Scanned PDFs contain pixels rather than selectable text and require OCR, which this page does not claim to perform.
更新记录
本次实质更新： PDF Text Extractor: Added Page-by-page extraction, Selectable text, Copy-ready output, Explicit no-OCR boundary, responsive controls, explicit runtime disclosure, and task-specific examples and limitations. 2026-10-15：补充结果检查步骤和具体能力边界。