Free PDF Metadata Editor – Edit Title, Author & Keywords

Control the Document Properties Behind Your PDF

Every PDF carries a set of document properties — the metadata that shows up in a viewer's info panel, in file manager previews, and in search engine results. These fields include Title, Author, Subject, Keywords, and Producer, and they are surprisingly easy to overlook even though they affect how your file is indexed, how it appears in a document library or reader sidebar, and how professional it looks when someone inspects the file properties. A PDF exported from a design tool might carry a generic title like "Untitled" or a temp file name, and the Author field might list the software rather than the person who wrote the document. Helperzy PDF Metadata Editor reads these fields, displays them clearly, and lets you edit each one in a simple form. The editor first loads the existing metadata values with pdf-lib so you can see what the file currently reports — the Title it was saved with, the Author that was recorded, the Subject line, any Keywords already stored, and the Producer string that identifies the software that created or last saved the file. You then change any field you like: set a clean, descriptive Title instead of a random export name, credit the correct Author, add a Subject that summarizes the document, enter Keywords to improve discoverability in search engines and document management systems, or adjust the Producer string. When you click Save, pdf-lib writes the new metadata into the document and hands you an updated PDF to download. The page content itself is completely untouched — only the property fields change. Here is a concrete case. Suppose you generated a 12-page annual report as a PDF from a design app, but the Title field reads "Layout_v3_final_FINAL" and the Author shows the software name. You upload the file, change the Title to "2025 Annual Report — Acme Corp," set the Author to your name, add Subject and Keywords for the report's topics, and save. You now have a professionally tagged PDF that displays a clean title in browser tabs, file managers, and search results, rather than an embarrassing temp name that makes the document look unfinished. Two things are worth verifying afterwards. The file size changes by a few hundred bytes at most, because you edited a handful of text fields rather than any page content. And Google, when it indexes a PDF, generally prefers the Title metadata over the heading printed on page 1, which is precisely why a stale export name can end up as your search result headline. The practical uses are steady and often overlooked until they matter. A publisher standardizes Title and Author across a set of documents before distributing them. A researcher adds Keywords so a paper surfaces in academic search systems. An archivist corrects Author and Subject fields on historical PDFs that were scanned without proper metadata. A business removes a misleading Producer string left behind by the tool that originally generated the file. A content team fills in SEO-friendly Titles and Keywords on PDF guides so they rank when someone downloads or indexes them. A few important notes to keep in mind. Editing metadata changes only the document's property fields, never the page content, layout, or text — it is purely informational. If you clear a field and save, that specific property is emptied in the output while other fields remain intact, so you do not accidentally wipe everything by editing one thing. The tool does not add or remove password protection, modify pages, or alter anything visual. The genuine trap is assuming metadata is private. Author names, department subjects, and software strings travel with a file wherever it goes, so a document you thought was anonymous can quietly identify the person and the machine that made it — check these fields before publishing anything sensitive, not after. Because everything runs in your browser using pdf-lib, your document is never uploaded to a server, which means sensitive reports, contracts, and personnel documents stay on your device with no server copy created at any point.

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