扫描图片转文字可以处理已有的扫描 PDF 吗？

This uploader is for image files. Use PDF to Text when your scan is already packaged as a PDF document.

What scan resolution should I start with for OCR?

Use a scan where small printed characters remain distinct when viewed normally. Increasing resolution cannot restore detail already missing from a poor original.

印章或手写批注会如何影响扫描件 OCR？

Marks crossing printed lines can obscure words or enter the result in the wrong place. Compare those regions manually with the source page.

Will OCR preserve the scan as a searchable page image?

This page produces editable text. Use Image to Searchable PDF if you want the visible scan and a recognized text layer in one document.

图像转文字

Scanned Image to Text — OCR Printed Page Images

选择您的图像

选择清晰可读的扫描页面图片，例如 PNG、JPG 或 TIFF

Recover editable text from a scanned document image. Set the source language and review skewed lines, column order and page noise before exporting TXT.

Older paper correspondence
Searchable text notes from printed material

选择您的图像

选择清晰可读的扫描页面图片，例如 PNG、JPG 或 TIFF

上传图片

选择清晰可读的扫描页面图片，例如 PNG、JPG 或 TIFF

All image formats (JPG, PNG, WEBP, HEIC, TIFF…)

Make an image-only paper record possible to edit

Read a scanned page image into text that you can correct and reuse. Straight pages and clear print improve the starting point; compare reading order and punctuation carefully when a scan contains columns, stamps or background noise.

Older paper correspondence

Prepare a checked text copy of a scanned letter, retaining dates, names and the original page for reference.

Searchable text notes from printed material

将相关措辞提取到文本文件中，并在纳入研究资料集前自行添加来源引用。

Check scan quality and reading order before exporting text

Use an upright scan and inspect it for cut-off edges or unreadable print.
Select the source language and compare the extraction with each text column.
纠正文字和分页，然后下载 TXT 或复制审核后的段落。

Scan resolution, annotations and searchable-PDF alternatives

扫描图片转文字可以处理已有的扫描 PDF 吗？: This uploader is for image files. Use PDF to Text when your scan is already packaged as a PDF document.
What scan resolution should I start with for OCR?: Use a scan where small printed characters remain distinct when viewed normally. Increasing resolution cannot restore detail already missing from a poor original.
印章或手写批注会如何影响扫描件 OCR？: Marks crossing printed lines can obscure words or enter the result in the wrong place. Compare those regions manually with the source page.
Will OCR preserve the scan as a searchable page image?: This page produces editable text. Use Image to Searchable PDF if you want the visible scan and a recognized text layer in one document.