PDF Metadata Editor
View and edit PDF document properties including title, author, subject, keywords, creation date, and producer information. All processing happens locally in your browser for complete privacy.
What Is PDF Metadata?
PDF metadata is hidden information embedded within a PDF file that describes the document's properties. This includes the title, author name, subject, keywords, creation date, modification date, and the software used to create or produce the file. While this data is not visible on the printed page, it plays a critical role in document organization, search engine indexing, and digital asset management.
Editing PDF metadata is essential for professionals who need to maintain accurate document records, improve discoverability in document management systems, or remove sensitive authorship information before sharing files externally. Our free online PDF metadata editor lets you view and modify all standard PDF properties directly in your browser without uploading files to any server.
How to Edit PDF Metadata
- Upload your PDF by dragging it into the drop zone or clicking to browse. Files up to 100 MB are supported.
- Review current metadata displayed below each field in italics. This shows the original values for reference.
- Edit any field including title, author, subject, keywords, creator, producer, and dates. Leave fields empty to clear them.
- Set the output filename in the dedicated field, or keep the auto-generated name.
- Click Save Metadata to apply changes. The processing stats will show fields modified, page count, output size, and time taken.
- Download your updated PDF with the new metadata embedded.
Features
- Complete metadata editing: Modify title, author, subject, keywords, creator, producer, creation date, and modification date.
- Original value reference: See the current metadata values displayed below each field so you know what you are changing.
- Copy as JSON: Export all metadata fields as a JSON object for documentation or automation workflows.
- Custom output filename: Name your output file before downloading instead of accepting a generic suffix.
- Processing statistics: View fields set, page count, output size, and processing time after saving.
- 100% browser-based: Your PDF never leaves your device. All processing uses pdf-lib running locally in JavaScript.
- Keyboard shortcuts: Press Enter to save metadata, Ctrl+D to download the result.
- Error handling: Clear error messages for invalid files, oversized uploads, or corrupted PDFs with auto-dismiss after 6 seconds.
- Cancel support: Stop processing at any time if you need to make changes.
Use Cases
Document management: Libraries, law firms, and enterprises use metadata to catalog thousands of PDFs. Setting accurate titles and keywords makes documents searchable in systems like SharePoint, Google Drive, or dedicated DMS platforms.
Privacy and anonymization: Before sharing contracts, reports, or proposals externally, you may want to remove the author name, creator application, or internal keywords that reveal confidential information about your workflow.
SEO for downloadable PDFs: Search engines index PDF metadata. Setting a descriptive title and relevant keywords helps your PDF documents rank in Google search results, driving organic traffic to your content.
Tips and Best Practices
- Use descriptive titles: Instead of "Document1.pdf", set the title to something meaningful like "Q4 2024 Financial Report" for better searchability.
- Separate keywords with commas: Enter keywords as a comma-separated list (e.g., "finance, quarterly, report, 2024") for maximum compatibility with search systems.
- Clear producer for privacy: The producer field often reveals which software created the PDF. Clear it if you do not want recipients to know your tools. Our editor patches the producer field correctly even though pdf-lib normally overrides it.
- Set modification date: If you leave the modification date empty, it automatically updates to the current time when you save, which is usually the desired behavior.
- Use Copy as JSON for backups: Before making changes, click "Copy as JSON" to save the original metadata to your clipboard. Paste it into a text file as a backup you can reference later.
- For bulk metadata operations across many files, consider pairing this tool with our Merge PDF tool to combine documents first, then set unified metadata on the merged result.
Understanding PDF Metadata Fields
The PDF specification defines several standard metadata fields. Here is what each one means and how it is used:
- Title: The document's display name in PDF readers and search results. Different from the filename.
- Author: The person or organization that created the content. Used by document management systems for attribution.
- Subject: A brief description of the document's topic. Helps with categorization in large document libraries.
- Keywords: Search terms associated with the document. Indexed by search engines and DMS platforms.
- Creator: The application that originally created the document (e.g., Microsoft Word, Adobe InDesign). Informational only.
- Producer: The software that converted or produced the final PDF output. Often set automatically by PDF libraries.
- Creation Date: When the document was first created. Useful for legal and compliance purposes.
- Modification Date: When the document was last modified. Updated automatically if left empty.
For advanced metadata needs like XMP data or custom properties, you may need desktop software like Adobe Acrobat. For standard PDF info dictionary fields, this online editor covers everything you need. You can also use our Protect PDF tool to add password protection after editing metadata, or Redact PDF to remove sensitive content from the visible pages.
Frequently Asked Questions
Is my PDF uploaded to a server?
No. All processing happens entirely in your browser using JavaScript. Your file never leaves your device, making this tool safe for confidential documents, legal files, and sensitive business materials.
Can I edit metadata on password-protected PDFs?
Yes. The editor can read encrypted PDFs using the ignoreEncryption option. However, the saved output will not retain the original password protection. Use our Protect PDF tool afterward to re-apply password security.
What happens if I leave a field empty?
Empty fields are saved as empty strings in the PDF metadata. This effectively removes that metadata entry. The modification date is automatically set to the current time if left blank.
Does editing metadata change the PDF content?
No. Only the document information dictionary is modified. The visible pages, text, images, and formatting remain completely unchanged.
Why does the producer field show pdf-lib after saving?
Our editor patches this automatically. The producer field is correctly set to whatever value you enter, even though the underlying pdf-lib library normally overrides it with its own branding.
What is the maximum file size supported?
Files up to 100 MB are supported. Larger files may cause browser memory issues. For very large PDFs, consider using our Compress PDF tool first to reduce the file size, then edit the metadata.
Related Tools
PDF metadata editing is a simple but powerful way to improve document organization, protect privacy, and boost SEO for downloadable files. Whether you are preparing documents for a client, cleaning up authorship information, or optimizing PDFs for search engines, this free browser-based tool handles it all without compromising your file security. Try editing your PDF metadata now, and explore our full suite of free online tools for more productivity solutions.