Upload the file
Select the document or paste the text you want to analyze with AI.
PDF, DOCX, TXT and more
Sensitive data stays on your computer
Compatible with every LLM
Use AI on your documents without exposing sensitive data.
AiNonymizer anonymizes files and text locally, lets you send them to the AI tool you prefer, and then restores the original data in the final response. Easy to install, simple to use, ready to try.
Quick installation
Local processing
Windows, Mac and Linux
The mechanism in seconds
Real data out, real data back in
Detected dataReplacement data
John Miller→Daniel Carter
03/14/1985→07/22/1981
+1 415 555 0187→+1 628 555 0142
Anonymized document ready for AI
Replacement dataRestored data
Daniel Carter→John Miller
07/22/1981→03/14/1985
+1 628 555 0142→+1 415 555 0187
Compatible with
The AI assistants you use today and the ones you will use tomorrow.
ChatGPTClaudeGeminiCopilotMistralLlamaPerplexityAnd more
How it works
From the original file to the final answer, without losing control.
AiNonymizer creates an anonymized copy of the content you want to use with AI. You work with confidence, then the software restores the real information locally in the answer you receive.
Confirm the data
Review the proposed replacements and confirm what should be anonymized.
Detected dataReplacement data
John Miller→Daniel Carter
03/14/1985→07/22/1981
+1 415 555 0187→+1 628 555 0142
Use AI
Send the anonymized document to your preferred AI assistant with confidence.
Anonymized document
ChatGPTClaudeGeminiMistral
Restore the answer
Bring the original data back into the final answer, still on your computer.
Replacement dataRestored data
Daniel Carter→John Miller
07/22/1981→03/14/1985
+1 628 555 0142→+1 415 555 0187
More precise recognition
Country-specific logic, not generic substitutions.
AiNonymizer uses recognition rules tailored to different national contexts, so it can identify sensitive information more effectively in real-world documents.
For users in the United States, the examples are aligned with familiar local formats and everyday document patterns.
United States
What it can recognize
⌂
US addresses
Personal names
Dates of birth
US phone numbers
Email addresses
Vehicle plates
Bank-account patterns
Examples: “325 Market Street, San Francisco, CA 94105”, “+1 415 555 0187”, “7ABC123” and “checking account ending in 4821”.
A concrete example
From real text to AI-safe text, one replacement at a time.
AiNonymizer keeps the content understandable while replacing sensitive data with realistic fictional equivalents. The animation highlights the change from original information to anonymized information.
Original text
What stays on your computer
Customer John Miller, born on 03/14/1985, submitted the documents from [email protected]. He can be reached at +1 415 555 0187 And lives at 325 Market Street, San Francisco, CA 94105. His bank details include Checking account ending in 4821 And the vehicle referenced in the file has plate 7ABC123.
Anonymized text
What you send to AI
Customer Daniel Carter, born on 07/22/1981, submitted the documents from [email protected]. He can be reached at +1 628 555 0142 And lives at 481 Pine Street, Seattle, WA 98101. His bank details include Checking account ending in 7314 And the vehicle referenced in the file has plate 8XYZ417.
Consistent replacement
Every real data point is replaced by a fictional equivalent while preserving readability and context.
John Miller→Daniel Carter
03/14/1985→07/22/1981
+1 415 555 0187→+1 628 555 0142
325 Market Street, San Francisco, CA 94105→481 Pine Street, Seattle, WA 98101
Account ending in 4821→Account ending in 7314
7ABC123→8XYZ417
Who it is for
Professionals and organizations that handle personal data.
AiNonymizer is designed for people who want to integrate AI into daily work without exposing confidential, identifying or sensitive information online.
Law firms
Summarize motions, claims, expert reports and case documents without exposing client data.
Accountants
Review financial statements and tax documents without sending real identifiers or account details.
Healthcare providers
Discuss clinical notes and medical documentation with AI without putting patient data at risk.
Human resources
Screen résumés and draft communications without exposing candidate information.
Research and universities
Analyze interviews, questionnaires and datasets before peer review or external sharing.
Public sector and consultants
Handle institutional documents while respecting internal policies and privacy rules.
Why AiNonymizer
Your sensitive data stays on your computer. Productivity can go anywhere.
AI is now an everyday tool for writing, analyzing, summarizing and working better. AiNonymizer helps you use it without copying names, addresses, contact details and other information you would rather not share online.
Everything stays on your computer
AiNonymizer detects, replaces and restores sensitive data locally. No original document needs to be uploaded to an external server.
More freedom when using AI
Work with text, files and LLM responses while reducing the risk of exposing confidential information.
Easy to understand, quick to use
Upload the content, confirm what should be anonymized and get a version ready for the AI assistant you prefer.
Pricing and licenses
Start free. Choose the right plan when AiNonymizer becomes part of your workflow.
The trial version is designed to show the product’s value immediately. Professional and team licensing options are available for ongoing use.
Free
Try it today with no commitment
Test the full anonymization and restoration flow with an immediate download and local processing on your machine.
Immediate download
Local processing on your computer
Compatible with every LLM
Ideal for testing AiNonymizer with real cases
€6 / month
For professionals without annual commitment
Single-seat license for professionals who use AiNonymizer continuously and want monthly flexibility.
Single-seat license
Professional use
Updates included
Dedicated support
€49 / year
Best value for ongoing professional use
The most convenient formula for consistent professional use with continuous updates and dedicated support.
Single-seat license
More affordable annual price
Updates included
Dedicated support
€199 / year
For small teams and studios
Designed for up to 5 seats, with easier team management and commercial support.
5 seats
Team management
Simpler internal adoption
Dedicated commercial support
€349 / year
For larger organizations
Perfect for structured teams, agencies and organizations that need multi-user licenses and dedicated support.
10 seats
Multi-user licenses
Dedicated commercial support
Ideal for firms, companies and organizations
Try it now
A few minutes are enough to see how it can change the way you use AI.
Download AiNonymizer, upload a file, review the replacements and send an already anonymized version to AI. The mechanism becomes clear once you try it.
Download
Start with the trial version.
Available for Windows, Mac and Linux. No sensitive data needs to leave your computer to understand how it works.
For your team
Want a solution for your team?
Tell us your needs and we'll get back to you to help you choose the right plan.
Start with the trial version
Download AiNonymizer, upload a file and try the full flow immediately. Your data stays on your computer.
Start with the trial versionFaq
The natural questions before the first download.
Everything needed to understand the product: what remains local, which AI tools it works with and how you stay in control of replacements.
No. Detection, replacement and restoration happen locally on your computer. Only the anonymized content is sent outside.
Any LLM or AI assistant: ChatGPT, Claude, Gemini, Copilot, Mistral, Llama, Perplexity and other current or future tools.
AiNonymizer is designed for documents and text. The published page can highlight the exact formats supported by the product.
No. AiNonymizer sits before and after your normal workflow: first it anonymizes the content, then it restores real data in the AI answer.
Before replacement, you can review the detected data and confirm which information should actually be anonymized.
Yes. You can define and refine the rules AiNonymizer uses to detect and replace specific information, making the workflow faster and better aligned with your needs over time.