# PDF-to-Kindle Conversion & Regex Patterns Cheat Sheet

## PDF-to-Kindle Conversion Methods

### Method 1: Email to Kindle
1. **Find your Kindle email**: On Amazon, go to "Manage Your Content and Devices" > "Devices" > select your Kindle device
2. **Approve your sending email**: In "Preferences" > "Personal Document Settings"
3. **Send the PDF**:
   - Subject line "convert" (to convert format) or blank (to keep as PDF)
   - Attach PDF (≤50MB)
   - Send to your_kindle_name@kindle.com

### Method 2: Calibre (Advanced)
1. **Install** from [calibre-ebook.com](https://calibre-ebook.com)
2. **Add PDF**: Click "Add books"
3. **Convert**: Select PDF → Click "Convert books" → Output format: MOBI or AZW3
4. **Configure**: Structure Detection, Look & Feel, Page Setup
5. **Transfer**: Connect Kindle via USB → Right-click book → "Send to device"

### Method 3: Send to Kindle App
1. **Install** from [Amazon Send to Kindle](https://www.amazon.com/sendtokindle)
2. **Launch and sign in**
3. **Add files**: Drag and drop PDFs or browse
4. **Send** to your Kindle

### Method 4: Online Converters
- [Zamzar](https://www.zamzar.com)
- [CloudConvert](https://cloudconvert.com)

### Method 5: Amazon's Conversion Service
1. Connect Kindle via USB
2. Copy PDF to "documents" folder
3. On Kindle, long-press PDF → "Convert to Kindle Format"

## Regex Patterns for E-book Conversion & Cleanup

### Clean Up Formatting Issues

#### Remove Extra Line Breaks
```regex
(?<!\n)\n(?!\n)
```
Replace with empty string to remove single line breaks while preserving paragraphs.

#### Fix Multiple Spaces
```regex
[ ]{2,}
```
Replace with a single space.

#### Remove Page Numbers
```regex
^\s*\d+\s*$
```
Replace with empty string to remove standalone page numbers.

#### Fix Hyphenated Words Across Lines
```regex
(\w+)-\s*\n\s*(\w+)
```
Replace with `$1$2` to join hyphenated words.

#### Remove PDF Headers/Footers
```regex
^.*?(?:Page \d+|Chapter \d+).*?\n
```
Customize based on your PDF's header/footer pattern.

### Table of Contents Extraction

#### Find Chapter Headings
```regex
^(Chapter|Section)\s+\d+[\.:]\s+(.*)$
```
Useful for generating a TOC from chapter headings.

#### Extract Page Numbers for TOC
```regex
(Chapter\s+\d+.*?)\s+(\d+)$
```
Captures chapter title ($1) and page number ($2).

### Metadata Extraction & Formatting

#### Extract Title
```regex
(?i)title[:\s]+([^\n]+)
```
Finds the title in metadata sections.

#### Extract Author
```regex
(?i)(?:author|by)[:\s]+([^\n]+)
```
Finds the author information.

#### Extract ISBN
```regex
(?i)ISBN(?:-13)?[:\s]*((?:\d[-\s]?){13}|\d{9}[\dXx])
```
Matches ISBN-10 and ISBN-13 formats.

### Code Block Formatting

#### Identify Code Blocks
```regex
```[\w+]*(.*?)```
```
Finds Markdown code blocks (including language specifier).

#### Fix Code Indentation
```regex
^( {4,}|\t+)(.*)
```
Identifies indented code lines.

## Advanced Regex for E-book Format Conversion

### HTML Cleanup (When Converting to MOBI/AZW3)

#### Remove Inline Styles
```regex
style="[^"]*"
```
Remove inline styles that may interfere with Kindle formatting.

#### Fix Empty Paragraphs
```regex
<p>\s*</p>
```
Replace with empty string to remove empty paragraphs.

#### Normalize Heading Tags
```regex
<h([1-6])[\s\w="]*>(.+?)</h\1>
```
Can be used to identify and standardize heading formats.

#### Fix Image References
```regex
<img[^>]*src="([^"]+)"[^>]*>
```
Identify image references for fixing broken paths.

### Special Character Handling

#### Convert Special Characters to Entities
```regex
[^\x00-\x7F]
```
Find non-ASCII characters that might need special handling.

#### Find and Replace Unicode Fractions
```regex
¼|½|¾|⅓|⅔|⅕|⅖|⅗|⅘|⅙|⅚|⅛|⅜|⅝|⅞
```
For replacing Unicode fractions with ASCII equivalents.

#### Find Smart Quotes
```regex
"|"|'|'
```
Convert to standard quotes if causing issues.

## Calibre-Specific Regex Search & Replace

Access in Calibre via "Convert books" → "Search & Replace"

### Remove Headers
```regex
^.+?CHAPTER.+?$
```
Customize based on your book's header pattern.

### Fix Scene Break Markers
```regex
^[*\s*]{3,}$
```
Standardize scene break markers.

### Fix First Line Indentation
```regex
(?<!\n\n)^\s+(?=[A-Z])
```
Identify and fix inconsistent first line indentation.

## File Naming Patterns for Organization

### Standard E-book Naming Convention
```regex
^((?:\p{L}|\s|\d)+)\s+-\s+((?:\p{L}|\s|\d)+)(?:\s+-\s+((?:\p{L}|\s|\d)+))?\.(\w+)$
```
Matches: "Author - Title - Series.format" pattern.

### Extract Series and Numbers
```regex
(?i)(.*?)\s*[(\[]?\s*(?:Book|#)?\s*(\d+(?:\.\d+)?)[)\]]?.*?$
```
Extracts series name ($1) and number ($2).

## Command Line Tools for Mass Processing

### Find PDF Files
```bash
find . -name "*.pdf" | grep -P "regex pattern here"
```

### Rename Files with Regex (bash)
```bash
for f in *.pdf; do 
    new=$(echo "$f" | perl -pe 's/regex pattern here/replacement/g')
    mv "$f" "$new"
done
```

## Troubleshooting with Regex

### Find Encoding Issues
```regex
�|’|â€Å"|â€Â
```
Common character encoding problems.

### Find Inconsistent Paragraph Formatting
```regex
\n\n+
```
Find multiple paragraph breaks for standardization.

### Find Orphaned Dialog Tags
```regex
\n["'](?:\s*\w+\s+)+(?:said|replied|asked|whispered|shouted)
```
Dialog tags separated from dialog.

## Tips for Best Results

1. **Always maintain a backup** of your original PDF
2. **Test your regex** on a small sample before batch processing
3. **Use Calibre's Editor** for extensive regex-based cleanup
4. **Combine methods** - convert first, then clean with regex
5. **Check your e-book** on actual device, not just in preview