anonym.legal

By · Last updated 2026-04-07

Home/Documentation/LibreOffice Extension/Getting Started

Getting Started with the LibreOffice Extension

Install the anonym.legal extension, sign in to your account, and run your first PII anonymization in LibreOffice Writer, Calc, or Impress.

1

Download & Install the Extension

Download the pre-built .oxt extension file and install it into LibreOffice.

Download anonym-legal-libreoffice-1.0.0.oxt

Quick Install (Recommended)

  1. 1.Click the download button above to get the .oxt file.
  2. 2.Double-click the downloaded .oxt file.
  3. 3.LibreOffice opens automatically and prompts you to install.
  4. 4.Restart LibreOffice when prompted.

Manual Installation

  1. 1.In LibreOffice, go to Tools → Extension Manager.
  2. 2.Click Add and select the downloaded .oxt file.

Restart LibreOffice after installation to activate the extension.

2

Open the Sidebar

After installation, open the anonym.legal sidebar panel.

Go to View → Sidebar, then click the anonym.legal deck icon.

The sidebar panel appears on the right side of your document. You can resize it by dragging the edge.

3

Sign In to Your Account

Enter your anonym.legal credentials to authenticate.

Enable Zero-Knowledge authentication for maximum protection. Your password is never sent to the server — only a cryptographic proof derived with Argon2id (64 MB memory, 3 iterations, parallelism=1).

Don't have an account? Create a free account with 200 free credits to get started.

Your session lasts 60 minutes. Credentials are cached locally for 7 days for quick re-authentication.

4

Analyze Your Document

Select the scope and run PII detection on your document.

  • Choose scope: entire document or current selection
  • 285+ entity types detected automatically
  • 48 language support with automatic detection

In Calc, analysis processes cell contents as tab-separated text. In Impress, it processes text from all slide objects.

5

Choose Your Anonymization Method

Select one of 5 anonymization methods based on your use case.

ReplaceToken Replacement

Replaces PII with typed credits like <PERSON_1>, <EMAIL_ADDRESS_1>. Consistent within a document.

MaskPartial Masking

Replaces characters with asterisks while preserving format. Useful for showing partial data like last 4 digits.

RedactPermanent Removal

Completely removes PII and replaces with [REDACTED]. Irreversible — the original data cannot be recovered.

HashSHA-256 Hash

Produces a cryptographic hash of the PII. Same input always produces the same hash for cross-document correlation.

EncryptAES-256-GCM Encryption

Encrypts PII with AES-256-GCM. With the correct key, you can decrypt and restore the original data.

6

Preview & Apply

Review detected entities in the preview dialog before applying changes.

  • Preview dialog shows up to 50 detected entities in a table
  • Select or deselect individual entities before applying
  • Choose different methods per entity type using per-entity operators

Click Apply to anonymize the document. Use Ctrl+Z (Cmd+Z on macOS) to undo if needed.

Tips & Best Practices

  • Always use the preview dialog to review detections before applying. You can deselect false positives.
  • Use Ctrl+Z (Cmd+Z on macOS) to undo anonymization immediately after applying.
  • Save frequently used configurations as presets for quick reuse across documents.
  • Format preservation works in Writer only — bold, italic, underline, font size, font name, color, and highlight are maintained.
  • For large documents, process sections at a time using selection mode to maintain accuracy.
  • Documents are processed in 8,000-character chunks with 400-character overlap to ensure no entities are missed at boundaries.
Back to Documentation

About this page

We update this page when our platform or the law changes.

Read our founder note for how we work.

Each change shows up in the timestamp at the top.

Related reading

We follow these rules

  • GDPR (EU 2016/679).
  • ISO/IEC 27001:2022.
  • NIS2 (EU 2022/2555).
  • HIPAA safe harbor under 45 CFR § 164.514(b)(2).

Our promise

We do not sell your data.

We do not train models on your text.

We store your files in Germany.

You can delete your account at any time.

You own your work.

Where we run

Our servers live in Falkenstein, Germany.

We use Hetzner. They hold ISO 27001 certification.

All data stays in the EU.

Backups run every day.

Need help?

Email support@anonym.legal.

We reply within one business day.

How we test

We run a full check suite on every release.

Each surface gets its own sweep script and report.

Human reviewers spot-check the output each week.

We track recall and precision on a labelled set.

Bad runs block the deploy.

What we never do

  • We never sell your information to third parties.
  • We never train models on what you upload.
  • We never keep your work after you delete it.
  • We never share keys with any outside firm.
  • We never run ads inside the product.

Plans in plain words

We sell credits, not seats.

One credit covers one short job.

Long jobs use a few credits each.

You can top up at any time.

Unused credits roll over each month.

Read the plans page for current rates.

Who built this

A small team of engineers and lawyers built this.

We ship from Europe and work in the open.

Our founder note spells out why we started.

Where to start

How the parts fit

A browser add-on cleans text inside Chrome.

A Word plug-in handles drafts in Office.

A small desktop tool works on whole folders.

An agent protocol link feeds large models safely.

All four share one core engine and one rule set.

Words from our team

We started this work after a lunch about cookies.

One friend kept getting odd ads on her phone.

We asked why a court file leaked through a draft.

We sketched the first build on a napkin that week.

By month three we had a tiny demo for a friend.

She used it on her first case the next day.

Common questions we hear

Can the tool read scanned PDFs? Yes, with OCR.

Does it work on long files? Yes, in small chunks.

Can I roll my own rule set? Yes, save it as a preset.

Does it run offline? The desktop build runs offline.

Do you keep my files? No, the cloud build wipes after each run.

Will it learn from my work? No, we never train on inputs.

A short tour of the workflow

Upload a file or paste a snippet of prose.

Pick the entities you want gone from the draft.

Choose a method: replace, mask, hash, encrypt, or redact.

Press run and watch the side panel show each hit.

Skim the result and tweak any rule that misfired.

Save the cleaned file or send it to a teammate.