PDF Info Explained: What Metadata Reveals and How to Edit It

How to Extract PDF Info Quickly: A Step-by-Step Guide

Extracting PDF metadata and document information can save time when organizing files, auditing document sources, or automating workflows. This guide shows fast, reliable methods—using built-in tools, free utilities, and simple command-line commands—so you can pick the approach that fits your skill level and needs.

What “PDF Info” includes

• Title, Author, Subject, Keywords (document metadata)
• Creation and modification dates
• Page count and page size
• PDF producer/creator and version
• Embedded fonts and attachments (in some tools)

Quick options at a glance

1. Preview or Reader properties (GUI, fastest for single files)
2. Command-line tools: pdfinfo (poppler), exiftool
3. Free GUI utilities: PDF-XChange Viewer, PDFsam Basic
4. Scripting: Python with PyPDF2 or pikepdf for batch extraction

Method 1 — Use a PDF reader (fastest for one-off checks)

1. Open the PDF in your preferred reader (Preview on macOS, Adobe Reader, or other).
2. Find File > Properties (or Document Properties).
3. View metadata: title, author, subject, keywords, creation/modification dates, page count.
4. Copy values manually if needed.

When to use: single files, quick checks, no installation required.

Method 2 — Command line: pdfinfo (recommended for speed and automation)

pdfinfo is part of the Poppler utilities and works on macOS, Linux, and Windows (via binaries or WSL).

1. Install poppler:
   • macOS (Homebrew): brew install poppler
   • Debian/Ubuntu: sudo apt install poppler-utils
   • Windows: download poppler binaries and add to PATH
2. Run:

   Code
   Copy CodeCopied
   pdfinfo filename.pdf 

3. Output includes: Title, Author, Creator, Producer, CreationDate, ModDate, Pages, Page size, and more.

Tip: For scripting, parse the output or use pdfinfo -meta for more details.

Method 3 — Command line: exiftool (reads many metadata types)

ExifTool can read and write a broad set of metadata fields.

1. Install exiftool:
   • macOS (Homebrew): brew install exiftool
   • Debian/Ubuntu: sudo apt install libimage-exiftool-perl
   • Windows: download executable
2. Run:

   Code
   Copy CodeCopied
   exiftool filename.pdf 

3. Review metadata fields; filter with exiftool -Title -Author filename.pdf for specific tags.

When to use: need extensive metadata exposure or cross-format consistency.

Method 4 — Batch extraction with Python (for automation)

Use PyPDF2 for basic metadata or pikepdf for more advanced access.

Example with PyPDF2:

python
Copy CodeCopied
from PyPDF2 import PdfReader reader = PdfReader(“filename.pdf”)
meta = reader.metadata print(meta.title, meta.author, meta.get(”/CreationDate”))
print(“Pages:”, len(reader.pages))

Example with pikepdf (more robust):

python
Copy CodeCopied
import pikepdf pdf = pikepdf.Pdf.open(“filename.pdf”)
info = pdf.docinfo print(info.get(”/Title”), info.get(”/Author”))
print(“Pages:”, len(pdf.pages))
pdf.close()

When to use: batch jobs, integrate into pipelines, extract and write metadata programmatically.

Method 5 — Online tools & free utilities

• Many web services show PDF info in the browser—useful for occasional needs.