PDF Word Counter — Words, Characters, Sentences & Stats Free
Words · Characters · Sentences · Paragraphs · Top Words · Reading Time · Language
Get complete word statistics for any PDF file instantly. Upload your PDF and the tool automatically counts words, characters, sentences and paragraphs for the full document and for each individual page. See the top 30 most frequent words, estimate reading and speaking time, and detect document language — all in your browser with no file upload.
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How to Count Words in a PDF Free
Upload your PDF and word counting starts automatically. The tool extracts all text using PDF.js, then counts words, characters, sentences, paragraphs, and unique words across every page. Results appear instantly — page-by-page breakdown, top word frequency list, reading time estimate and language detection. Download full stats as CSV or copy to clipboard. 100% free, no account required.
What is Lexical Density?
Lexical density is the ratio of unique words to total words in a text, expressed as a percentage. A higher lexical density means a wider vocabulary range — academic and technical texts typically score 50–70%, while conversational text scores 30–50%. Use it to gauge the vocabulary richness of any PDF document.
Frequently Asked Questions
How does the PDF word counter work?
The tool uses PDF.js to extract the text layer from every page of your PDF. Each page's text is then processed to count words (sequences of letters), characters, sentences (ended by . ! ?), and paragraphs (double line breaks). All stats are totalled and displayed in a breakdown table with a visual bar chart.
What is lexical density and why does it matter?
Lexical density is the percentage of unique words relative to total words. A score of 60% means 60 of every 100 words are unique — high density indicates rich, varied vocabulary. Academic writing typically scores 50–70%. Low scores (under 30%) suggest repetitive language. It's useful for assessing document complexity.
Can I count words in multiple PDFs at once?
Yes. Switch to Batch mode, upload up to 5 PDFs, and click Count All PDFs. A comparison table shows all stats side-by-side: total words, characters, sentences, pages, reading time, unique words and lexical density. Download everything as a single CSV file for spreadsheet analysis.
How are speaking time and reading time different?
Reading time uses 238 words per minute — the average silent reading speed for adults reading non-fiction. Speaking time uses 130 words per minute — the standard pace for presentations, speeches, and audiobook narration. Both are estimates; actual speed varies by content complexity and individual.
What are stop words and should I include them in top words?
Stop words are common English function words (the, a, and, is, for, etc.) that appear in nearly every document but carry no content meaning. By default, the Top Words list filters them out so you see meaningful keywords. Toggle "Exclude stop words" off to include them — useful when you need a true frequency distribution of all words.