PDF 字数统计与阅读时间计算器
统计任意 PDF 中的字数、字符数和页数，并估算阅读时间。免费、即时，且内容绝不会离开您的浏览器。
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常见问题
Is this word counter free?
Yes, completely free with no limit on the number of files or pages.
Does my file get uploaded to a server?
No. The PDF is read and analyzed entirely in your browser using JavaScript — the file itself is never sent anywhere.
How is reading time calculated?
Reading time is estimated using an average adult silent-reading speed of 200 words per minute. Actual reading time varies by document complexity and reader.
Does it work on scanned PDFs?
Only if the scanned PDF already has a text layer (for example, from OCR). A pure image scan with no embedded text will show a word count of zero — run it through an OCR tool first to add a searchable text layer.
What counts as a "word"?
Any sequence of characters separated by whitespace, matching how most word processors count words.