Page preview
See the PDF page and highlighted areas before anything is exported.
Works offline No PDF uploads
Redact PDFs offline,
in your browser.
Load the tool, disconnect from the internet, and redact searchable PDFs without uploading them anywhere. For scanned PDFs, load OCR tools first, then continue offline.
- Offline
- No uploads
- Review
- Free
- Works offline
- No PDF uploads
- Review before export
- Free, no signup
Offline proof
Do not trust the claim. Test it.
hddn is designed so the privacy claim can be checked on your own device after the tools are loaded.
Try offline redaction- Open the redaction tool
- Click "Load offline tools"
- Turn on airplane mode
- Refresh /redact
- Open and redact a PDF while disconnected
How it works
Local PDF redaction in a few clear steps.
Open a PDF, review suggested redactions, and export a clean copy without sending the document to a processing server.
01
Open your PDF
Drop your file into the page. Your browser opens it on your device.
02
We mark possible sensitive data
We highlight things like names, emails, phone numbers, IDs, and bank details that may need to be hidden.
03
Review and adjust
Keep or remove our suggestions. Add your own markings if needed.
04
Export a clean PDF
Save a version with the selected data permanently removed.
Example
Review workspace. Clear page view. Final decision stays with you.
The app shows the page, suggested redactions, and manual tools in one place so you can inspect every change 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.
Local processing
Offline mode works even in airplane mode.
Open hddn while connected, load offline tools, then disconnect before opening sensitive PDFs.
The redaction workspace can reload from browser cache and process the PDF locally.
Text-based PDFs can be redacted offline after the workspace is loaded. Scanned PDFs need OCR tools loaded first.
Short version
Offline mode saves tool files in browser cache. Your PDFs are not saved by offline mode. No document-processing server is used. Refresh /redact while disconnected to verify it.
What actually happens
browser-side
hddn loads The site loads the tool into your browser.
Your browser works Open, review, and prepare the PDF on your device.
Your PDF stays put The file does not need to be sent anywhere to be edited.
Privacy and trust
Local PDF redaction keeps your document on your device
Your PDF is processed directly in your browser.
It is not uploaded, stored, or sent to an app server for redaction.
Offline mode stores app tooling files only, so you can disconnect before opening sensitive PDFs.
You review everything before export, and the final file is saved back to your device.
What this means
local review
- 01 No file uploads for redaction
- 02 Review every suggestion
- 03 Manual changes stay in your control
- 04 Permanent redaction on export
When to use hddn
Use this PDF redactor before a document leaves your hands.
Share safely
Before sending a PDF to someone else
Check the file first, hide what should stay private, then send the clean version.
Before AI tools
Before uploading a document to AI tools
Remove personal details first when you want to use a document with another tool.
Everyday documents
Before sharing contracts, reports, IDs, or forms
Use it on the kinds of PDFs that often carry names, numbers, and sensitive details.
General protection
Any time a PDF contains personal or sensitive information
If a document feels too revealing to share as-is, review it here first.
Why people use it
Simple, review-first PDF redaction.
Built for people who want calm, browser-based PDF redaction before a document leaves their hands.
- Simple to understand
- No signup required
- Free, no signup
- You review every change
- Clean PDF export
- Sensitive data stays under your control
Supported right now
A clear scope for safe, focused PDF redaction.
Input PDF Files only
File cap 25 MB Per file
Pages 30 Per document