Modify PDF Properties

Read and edit real PDF metadata — title, author, subject, keywords, creator, producer, creation date and modification date. PDF-lib reads existing values directly from the PDF binary and writes your changes back permanently. No sign-up, no upload, 100% private.

8Metadata Fields
PDF-libReal Binary R/W
Before/AfterChange Preview
PrivateNo Upload

Our free PDF properties editor lets you modify PDF metadata online without sign-up or server upload. Upload any PDF and the tool instantly reads all existing metadata from the real PDF binary using PDF-lib — title, author, subject, keywords, creator application, producer name, creation date and modification date are all populated automatically. Edit any field, set a new modification date with one click, or clear all PDF metadata for privacy before sharing. A live before—after comparison table shows exactly what will change. When you click Save, PDF-lib writes all changes back into the PDF binary using standard PDF document information dictionary fields. Whether you need to change PDF author name, update document titles for SEO, fix metadata on scanned documents, remove personal information, or simply view and edit PDF document properties, this 100% browser-based tool works with zero data transmission and no third-party services.

PDF Metadata Editor — Read, Edit and Save PDF Properties

Upload PDF › Existing metadata loads instantly › Edit any field › Preview changes › Save modified PDF

How it works: PDF-lib reads the real PDF DocInfo dictionary from the binary. All existing property values are pre-filled into the form fields. Edit any field — changed fields are highlighted teal. The before—after comparison shows exactly what will change. Save writes your updates back to the real PDF binary.
PDF
Drop a PDF to view and edit its properties
Existing metadata loads automatically — title, author, dates and more
🔒 Your file never leaves your device • 100% private • No sign-up
Accepts .pdf files • PDF-lib reads existing metadata from binary • No server upload
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Document Identity Core identification metadata
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Displayed in browser tab and PDF viewers
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Person or organisation who created the content
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Comma-separated keywords for search indexing
Application Information Software that created and processed the PDF
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Application that originally created the document
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PDF generation library or printer driver used
Document Dates Creation and modification timestamps
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Before / After Preview — 0 field(s) changed

FieldCurrent ValueNew Value
0 field(s) changed

How to Modify PDF Properties

01

Upload Your PDF

Drag and drop any PDF onto the upload area or click "Open PDF File". PDF-lib instantly reads all existing metadata from the real PDF binary — title, author, subject, keywords, creator, producer and dates are all pre-filled into the form fields automatically.

02

Edit Any Field

Modify any property field — changed fields are highlighted in teal. The before—after comparison table updates live showing the original value and your new value side by side. Use Clear All Metadata to blank everything, or Now to set the modification date instantly.

03

Save Modified PDF

Click "Save Modified PDF" — PDF-lib writes all changes to the PDF document information dictionary in the real PDF binary. The modified PDF downloads automatically with all property changes permanently embedded.

PDF Properties You Can Edit

Title & Author

Set the document title displayed in PDF viewers, browser tabs and search results. Update the author name — useful for fixing scanned documents or correcting attributed authorship before sharing.

Subject & Keywords

Add a subject description and comma-separated keywords for improved search indexing and document management. Useful for making PDFs discoverable in document management systems.

Creator & Producer

View and edit the application that created the document and the PDF library that produced it. Useful for standardising metadata across documents or removing software fingerprinting information.

Creation & Modification Dates

Read and update the creation and modification timestamps embedded in the PDF binary. Use the "Now" button to instantly set the modification date to the current date and time.

Clear All Metadata

One-click to blank all metadata fields simultaneously — title, author, subject, keywords, creator, producer and dates. Essential for privacy when sharing PDFs that contain personal or identifying information.

Live Before—After Preview

A change preview table updates in real time showing each modified field with its original value (struck through) and new value. The counter shows how many fields have been changed before you commit.

Frequently Asked Questions

What PDF properties can I edit with this tool?
You can edit all standard PDF DocInfo metadata fields: Title, Author, Subject, Keywords, Creator (the application that made the document), Producer (the PDF library used), Creation Date, and Modification Date. PDF-lib reads the existing values from the real PDF binary and writes your changes back using the PDF Document Information Dictionary standard.
Are the changes permanently saved in the PDF?
Yes. PDF-lib writes all metadata changes directly into the PDF Document Information Dictionary in the binary. The changes are permanent in the downloaded file and are visible in any PDF reader's File > Properties panel, including Adobe Acrobat, Preview, Chrome PDF viewer and others.
Can I remove all metadata from a PDF for privacy?
Yes. Click "Clear All Metadata" to blank every field simultaneously. This removes title, author, subject, keywords, creator, producer and dates in one click — ideal when sharing PDFs externally and you want to strip identifying information before distribution.
Is this tool completely free?
Yes, 100% free. No sign-up, no subscription, no watermarks on the output. Your PDF never leaves your device — PDF-lib reads and writes metadata entirely in your browser with no server upload at any point.
Is my PDF file private?
100% private. Your PDF file is processed entirely in your browser. PDF-lib reads metadata locally, the form is populated locally, and the modified PDF is generated and downloaded locally — no data is transmitted to any server or third party at any stage.

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