How to Edit PDF Metadata: 3 Free Methods Explained

To edit PDF metadata, you need a dedicated software, since most PDF viewers only display these details instead of letting you change them. Mac users can run a free Automator workflow, while both Windows and Mac users can turn to free programs like LibreOffice or WPS Office to update a PDF’s title, author, subject, and keywords.

While this information is often unseen by readers, it can greatly affect the document’s accessibility and searchability, so it’s important to know how to edit PDF metadata. Outdated or incorrect metadata can also make a file harder to trust in legal, academic, or business settings.

This guide covers three free ways to edit PDF metadata on Windows and Mac, when you actually need to change it, and how to avoid the most common mistakes.

Key Takeaways

• PDF metadata includes a document’s title, author, subject, keywords, and creation date; these details shape searchability and organization, not the page content itself.
• Mac users can edit PDF metadata for free with Automator’s built-in “Set PDF Metadata” action, with no extra software required.
• LibreOffice and WPS Office are free, cross-platform tools that let you edit and re-save a PDF’s metadata on Windows, Mac, or Linux.
• Updating PDF metadata corrects errors, improves document categorization, or helps search engines index the file correctly.
• Editing metadata can overwrite other fields or fail on password-protected files, so back up the original PDF first.

What is PDF Metadata?

PDF metadata refers to a file’s background details that a document management system or search engine uses to identify and organize the file, without ever appearing on the page itself.

These can include the following:

• Author name: The author of the document
• Title: The title of the work
• Creation date: When the document was created
• Subject: A brief description of the document’s content
• Keywords: Keywords relevant to the document’s subject
• Copyright: The document’s copyright information
• Software: What software was used to create the document

In legal or academic settings, where they deal with a large amount of data, PDF metadata is crucial in organizing related documents and improving their searchability. Moreover, search engines rely on a PDF’s metadata when categorizing and ranking content.

So, if you’re planning to upload your document online, it’s best to edit PDF metadata and optimize it for SEO.

How to Edit PDF Metadata for Free

Editing PDF metadata doesn’t require paid software. Mac users already have a built-in option, and Windows users can reach for free, open-source alternatives. If you want to see more options beyond these, our roundup of the best PDF editors compares free and paid software side by side.

Also, if you already pay for Adobe Acrobat or Foxit PDF Editor, both include a more polished built-in metadata editor. However, neither is necessary if you just need to update a handful of fields for free.

That said, let’s examine the three methods that work without a subscription:

#1. Edit PDF Metadata on Mac with Automator

Editing a PDF on Mac isn’t the same as editing metadata. macOS doesn’t let you edit PDF metadata directly in Preview since its Inspector only displays existing details. However, Automator, Apple’s free built-in automation app, can change them instead.

Here’s how to edit PDF metadata on Mac step by step:

1. Open Automator and create a new Quick Action.
   
2. Search for the Set PDF Metadata action and drag it into the workflow.
   
3. Enter the title, author, subject, and keywords you want the file to have, and save the workflow.
   
4. Right-click your PDF in Finder and run the Quick Action.
   

However, Automator edits the file in place, so keep a backup copy if you want to preserve the original metadata.

#2. Edit PDF Metadata with LibreOffice

LibreOffice is an open-source Office suite that allows you to make edits and modifications to various file formats, and it offers a simple and straightforward way to edit metadata in PDF.

Here’s how you can do so:

1. Open your PDF file on LibreOffice.
   
2. Click on File in the upper left corner of the page. Then, scroll down and click on Properties to bring up the PDF’s metadata.
   
3. Once the Properties window opens, select the Description tab and update the title, subject, keywords, and comments fields.
   
4. Click OK, then go to File › Export As › Export as PDF to save the changes.

The advantage of LibreOffice is that it creates a new file rather than overwriting the original.

#3. Edit PDF Metadata with WPS Office

WPS Office is another option that works on both Windows and Mac for editing PDF metadata. This AI-powered Office suite offers a premium version that allows more functionality, but if you just want to edit PDF metadata, you can do so on the free version. Plus, it has a mobile app if you’re away from your desktop.

With that said, here’s how to edit PDF metadata using WPS Office:

1. Open the file on WPS Office.
   
2. Click on Menu in the upper left corner and look for Properties.
   
3. Click on Properties to access the document’s properties and edit the PDF metadata.
   

Protect Your PDF After Updating the Metadata

Once you’ve corrected a document’s title, author, or keywords, the next risk is someone changing it back, or changing the PDF’s actual content, without your knowledge. That’s especially true when you’re sharing a finalized legal, academic, or business document where accuracy matters.

For this reason, password-protecting your PDF locks it against edits, so the metadata and content you just finalized stay that way. Here’s how to do it with pdf.net step by step:

1. Go to our Protect PDF tool and upload your PDF file directly from your device, or use drag-and-drop function.
   
2. Type in your password and click Set password.
   
3. Wait for the encryption process to finish.
   
4. Once the encryption process completes, click Continue.
   
5. Download your password-protected file.
   

With pdf.net, there’s nothing to install, and the file never leaves your browser during the process.

Which Free PDF Metadata Editor Should You Use?

The right free PDF metadata editor depends on your operating system and whether you want to edit a file in place or create an updated copy. Mac users get the fastest option with Automator, while Windows users need LibreOffice or WPS Office.

Here’s a quick breakdown:

Why and When Should You Change PDF Metadata?

You should change PDF metadata when you want to correct errors in the document, improve its categorization, or enhance its searchability. Each of these situations calls for updating a different combination of fields, from the title and author to the subject and keywords.

Let’s discuss each one in detail:

#1. Correcting Errors

One of the main reasons why you may need to alter PDF metadata is to correct errors in its information, such as the title or subject.

Having incorrect or outdated information in the metadata can cause confusion for people who need the file for specific purposes and will reflect poorly on the document’s credibility. This is especially important in academic settings, where students may need certain documents for research and other purposes. Accurate metadata also makes it easier to cite a PDF correctly when you’re referencing it in your own work.

Meanwhile, you may want to change the PDF metadata creation date to ensure that it reflects the latest edits made to the document. For example, if a legal document was amended past the creation date on the file, you may want to edit the date on the PDF’s metadata to ensure that other readers know the document is the most up-to-date version.

#2. Improving Document Categorization

Metadata is crucial in document categorization, so it’s important to have all the necessary information about a file to improve PDF organization. For instance, when arranging legal contracts or agreements, having the right relevant keywords in every file will allow your document management system to group related files together for easier access later on.

For example, the IRS’s own recordkeeping guidance requires that electronically stored business records stay indexed and retrievable, which is nearly impossible without consistent, accurate metadata across a file set.

#3. Enhancing Discoverability

Unlike websites and pages, improving PDF discoverability can be more challenging because search engines cannot assess the document’s content. Because of this, it’s crucial to use a PDF metadata editor tool to add keywords and an optimized title or subject to your file to boost its discoverability.

For instance, to optimize a PDF for web, it’s recommended to keep the description field under 160 characters to avoid truncation in search results, and using comma-separated keywords that match how people actually search.

What Common Issues Come Up When Editing PDF Metadata?

The most common issues when editing PDF metadata are losing other fields by accident when you save changes, and getting locked out of a file that’s password-protected. Both problems are avoidable if you back up the original file and confirm you have the right password before you start.

#1. Potential Data Loss

Using a PDF metadata remover may cause some unintentional data loss, especially when saving over the original file. For instance, some editing software can overwrite the existing metadata fields and only save the information you edited. This means that if you only changed the subject and author, then you may lose other information, such as the title, creation date, and so on.

#2. Lack of Access

Another common issue when editing PDF metadata is the lack of access to a password-protected file. If you are going to edit someone else’s document, make sure that the file isn’t restricted and that you have the right password to access it.

If you forgot the PDF password, you can simply recreate the file. However, if you are unable to do so, there are several tools that you can use to unlock PDFs.

Final Thoughts

Editing PDF metadata is a small step that makes a real difference in how a document gets found, trusted, and organized, whether you’re fixing an outdated title or optimizing a file before you publish it. Automator, LibreOffice, and WPS Office each get the job done for free, so there’s no need to pay for software just to update a handful of fields.

Once your file’s metadata is accurate, protecting the finished document keeps those details from getting changed again, whether by accident or by someone else entirely.

How to Edit PDF Metadata FAQs

#1. Can I modify or remove metadata from a PDF on a smartphone?

Yes, you can modify or remove metadata from a PDF on a smartphone for free using an app like WPS Office, which offers PDF property editing on both iOS and Android. Open the file, find its properties or details menu, and update the title, author, subject, or keywords the same way you would on a desktop.

#2. How can I share files after I change my PDF metadata?

To share files after changing PDF metadata, you need to download the modified file and save it to your device. Some editors create a new copy rather than overwriting the original, so once you have the right version, you can share it via link or email, as well as any file-sharing service as usual.

#3. Can I edit metadata for multiple PDF files at once?

Editing metadata for multiple PDF files at once is possible, but only with the right tool. Automator on Mac can batch-edit metadata across an entire folder of PDFs in one workflow, while most free desktop programs, including LibreOffice and WPS Office, only let you edit one file at a time.

#4. Is it possible to edit metadata in password-protected PDFs?

It’s possible to edit metadata in password-protected PDFs as long as you know the file’s password. Unfortunately, if you don’t have the password, you won’t be able to edit its metadata.

#5. Does changing PDF metadata affect the file’s visible content?

Changing PDF metadata does not affect a file’s visible content, since metadata is background information stored separately from the text and images on the page. Editing the title or author field won’t alter what a reader sees when they open the document; it only changes how the file is described and indexed.

#6. Why won’t my PDF’s metadata save after I edit it?

Your PDF’s metadata usually won’t save because the file is read-only, password-protected, or the editor requires you to export a new copy instead of overwriting the original. Check the file’s permissions first, then confirm whether your software needs an extra export or save-as step to apply the changes.