編輯 PDF 中繼資料
更新 PDF 中儲存的標題、作者、主題與關鍵字。
運作方式
上傳您的 PDF，編輯任何欄位（已依檔案現有的中繼資料預先填入），然後下載結果。
我可以變更哪些中繼資料？
標題、作者、主題與關鍵字——大多數 PDF 閱讀器會在「文件屬性」或「檔案資訊」中顯示的文件屬性。
這會改變 PDF 的外觀嗎？
不會——中繼資料是關於檔案本身而非其內容的隱藏資訊。頁面、文字與圖片都不會受到影響。
Why would I want to change a PDF's metadata?
To remove a previous author's name before sharing, add proper keywords for searchability, or fix a wrong title that shows up in browser tabs and file previews.
Can I clear a field completely instead of changing it?
Yes — leave the field empty before downloading and it's saved as blank.
Does this affect the creation or modification date shown by my OS?
It updates the PDF's internal document properties, not your operating system's file-system timestamps, which are set separately when the new file is saved to disk.
Does this touch XMP metadata or custom fields?
No — it only edits the classic document-info fields (title, author, subject, keywords), the same ones most "File Info" dialogs show. Some PDFs, especially ones made in Adobe apps, also carry a separate XMP metadata stream or custom vendor fields; this tool doesn't read or write those, so old values there can survive even after you update the fields here.
Can old metadata leak information I don't want to share?
Yes. PDFs exported from Word, Google Docs, or Acrobat often keep the real name of whoever created or last saved the file — sometimes a company name too — even if you never typed it in yourself. Overwriting the author and title fields here removes that before you send the file anywhere.
Does the title or keywords field affect how my PDF shows up in Google?
It can. Search engines that index a PDF often use its Title field as the headline in search results, and a blank title usually falls back to the raw file name. Filling in Title and Keywords with accurate text won't guarantee rankings, but it gives search engines something better to show than "scan0042.pdf".