Calculator
What the PDF Metadata Editor does
PDF Metadata Editor: reads the document information dictionary (title, author, subject, keywords, producer), rewrites the fields you enter, or strips every entry including creation and modification dates, so you control what a PDF discloses before you share it. Everything runs in your browser and the file is never uploaded.
The PDF Metadata Editor calculates the file you choose without uploading it anywhere. The work happens inside your browser tab, so there is no upload to wait for and no queue.
Most PDF chores are simple, yet the usual tools want an account and an upload first. The PDF Metadata Editor exists to take that particular chore off your hands.
Everything happens inside this page. Nothing you type is sent to a server, and there is nothing for us to store.
The method, a field-by-field reference and a worked example built from the defaults are all on this page.
What do the PDF Metadata Editor fields mean?
The PDF Metadata Editor uses 6 inputs. Starting values are already in place, which saves the usual blank-form hesitation about what a field wants.
| Field | What to enter | Default |
|---|---|---|
| PDF File | stays on your device | none |
| Action | choose from Read metadata, Update fields and download or Remove all metadata and download | Read metadata |
| Title | optional | none |
| Author | optional | none |
| Subject | optional | none |
| Keywords (comma-separated) | optional | none |
How does the PDF Metadata Editor work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same calculation.
Values are checked first: an out-of-range or non-numeric entry names the offending field instead of returning nonsense.
What a typical run looks like
You provide: PDF File, Action, Title, Author, Subject and Keywords (comma-separated)
What happens: the file is read into memory by your browser, processed locally, and offered back as a download. It is never uploaded.
You get back: a download link for the new file and a short note on what changed.
Timing comes down to your own hardware, and the practical size limit is how much memory the browser will hand the tab.
How to use it
- Choose your file under PDF File, or drag it onto the drop area.
- Pick a value for Action: the options are Read metadata, Update fields and download or Remove all metadata and download.
- Enter Title.
- Set Author.
- Put Subject.
- Key in Keywords (comma-separated).
- Press Apply.
- The panel reports Status, Pages, Title, Author, Subject, Keywords, Producer and Size (KB).
- The link encodes your inputs, so saving it is enough to reproduce the result later.
What this tool does not do
- Very large documents are limited by your device memory, not by a server quota.
- Encrypted or password-protected files must be unlocked before they can be processed.
- The result reflects the moment you ran it; anything that changes over time is not tracked.
- Large files are limited by your available memory, not by an upload quota.
Frequently asked questions
You need PDF File, Action, Title, Author, Subject and Keywords (comma-separated). Defaults are loaded for all of them, which makes it easy to isolate the effect of a single variable.
Your file stays on your machine. Nothing is transmitted, stored or queued for processing elsewhere.
Free, and there is no upsell. The whole tool is the free version.
The calculation is exact for the method described above. Where a value is rounded for display, the underlying figure keeps full precision.