Page preview
See the PDF page and highlighted areas before anything is exported.
How it works
How local PDF redaction works
See how local PDF redaction works in hddn: open a file, review suggested redactions, and export a safely redacted PDF.
Step 1 - Open your PDF
Drop your file into the page.
Your browser opens the PDF directly on your device.
Step 2 - We mark possible sensitive data
The tool highlights things that may need to be hidden, such as:
- names
- emails
- phone numbers
- IDs or other personal details
These are only suggestions.
Step 3 - You review everything
You decide what should be removed.
You can:
- keep or remove suggested markings
- add your own markings if something was missed
You stay in control of the document.
Example
What the review screen looks like
One screen holds the page preview, suggested redactions, and manual tools so you can check everything before export.
Review queue
Check suggested detections one by one and keep only what should be redacted.
Manual control
Add your own redactions when the document needs extra cleanup.
Step 4 - Export a clean file
When you're ready, export the PDF.
The selected data is permanently removed from the file.
You can then share the redacted version with more confidence.
How this works without uploading your file
When you open hddn, the site loads the redaction workspace into your browser. After that, your browser can open and edit your PDF locally.
This means:
- your file stays on your device
- it is not uploaded or sent anywhere
You can load offline tools, disconnect, refresh /redact, and test this workflow yourself.
Important
The tool helps you find sensitive data, but it may not catch everything.
Always review your document before exporting and sharing it.