76 lines
2.8 KiB
Markdown
76 lines
2.8 KiB
Markdown
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---
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title: PDF Extraction
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description: Extract and convert formulas from PDF documents automatically with TexPixel
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slug: pdf-extraction
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date: 2026-03-25
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tags: [PDF, extraction]
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order: 6
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---
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# PDF Extraction
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TexPixel can process entire PDF documents and extract every formula from every page — automatically. This is useful for textbooks, research papers, or any multi-page document with mathematical content.
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## How to Extract from a PDF
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1. Click the upload zone or drag and drop your PDF file.
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2. TexPixel detects all pages and identifies formula regions.
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3. Each recognized formula is listed in the result panel.
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4. Copy individual formulas or export the entire document as DOCX.
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## What Gets Extracted
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TexPixel identifies formulas in PDFs regardless of whether they were:
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- Typeset in LaTeX (rendered as vector math)
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- Embedded as images (scanned pages)
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- A mix of both
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For vector PDFs (generated from LaTeX or Word), recognition accuracy is typically 95%+. For scanned/image PDFs, accuracy follows the same image quality guidelines as regular image uploads.
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## Supported PDF Types
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| Type | Description | Accuracy |
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|---|---|---|
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| Vector PDF | Created from LaTeX, Word, or typesetting tools | 95–99% |
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| Scanned PDF (high quality) | 300 DPI scan of printed text | 90–97% |
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| Scanned PDF (low quality) | < 150 DPI or poor contrast | 60–80% |
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| Photo PDF | Photographed pages embedded as images | 75–90% |
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## File Limits
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- **Max file size:** 20 MB
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- **Max pages:** 50 pages per upload (Pro plan: unlimited)
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- **Processing time:** ~2–5 seconds per page
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For documents exceeding these limits, split the PDF into smaller chunks before uploading.
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## Exporting PDF Results
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After extraction, you can export in several ways:
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- **Copy individual formula** — click any recognized formula to copy its LaTeX
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- **DOCX export** — download the full document with formulas as native Word equations
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- **Batch copy** — copy all formulas as a list (Pro feature)
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## Tips for Better PDF Results
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- **Use the original PDF**, not a re-scanned copy — vector PDFs give the best results
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- **Avoid password-protected PDFs** — these cannot be processed
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- **Crop pages** if a PDF has wide margins with no content — smaller pages process faster
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- **Split by chapter** for very large documents to stay within page limits
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## Common Issues
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**"No formulas found"**
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The PDF may be encrypted, have formulas stored as complex vector paths, or use non-standard encoding. Try converting the page to a PNG image and uploading that instead.
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**Formulas recognized but garbled**
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This often happens with very low DPI scans. Try using a PDF scanner app to rescan at 300 DPI before uploading.
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**Processing is slow**
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Large PDFs with many pages can take 30–60 seconds. This is normal. The result will appear when processing is complete.
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---
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[Upload a PDF and extract formulas →](/app)
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