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PiBye

For Mac · Runs on your Mac

Use AI on client documents. Keep the names on your Mac.

PiBye hides names, addresses, dates and ID numbers in a copy of your document so you can paste it into any AI. When the reply comes back, PiBye puts the real details back. All of it happens on your Mac.

Free to try: your first 10 documents · then $99 CAD once, with 12 months of updates

1.0.10 · macOS 14.8.5 or later · Apple Silicon · 1.0 GB

· Signed and notarized by Apple

Dear Amelia Rousseau, I have read the lease you signed on 14 March 2026 for 18 Rue Laval, Gatineau, file 4471-220. The notice Ms Rousseau gave on 2 October is valid, and the deposit is due back within 30 days.

Original. The letter as written, on your Mac.

How it works

Four steps, all on your Mac.

  1. Open a document.

    PDF, Word, Markdown or text. Scanned pages are read on your Mac.

    PiBye import screen with a document dropped in
  2. Check what PiBye found.

    Confident matches are hidden already; uncertain ones are listed for you. Click any word to hide it or leave it visible. The same person gets the same placeholder every time, like [PERSON_001].

    PiBye review screen listing each detected name and number with hide and keep controls
  3. Send the copy to any AI.

    Save or copy the AI-ready version and paste it into Claude, ChatGPT or whatever you use. Approved copies sit in Documents.

    PiBye document ready to copy for an AI, names shown as numbered placeholders
  4. Put the details back.

    Paste the AI’s reply into PiBye. It restores the real names locally and saves the finished file.

    PiBye restore screen with the AI’s reply and the real names put back

Real PiBye screens. Sample details are invented.

23 seconds

Open, check, send, restore.

Recorded in PiBye with invented details.

Local by design

Nothing to upload, so nothing leaks.

Originals
Never leave your Mac. Vault keeps them and your finished files.
The name key
The list of who [PERSON_001] really is lives only on your Mac. Only PiBye on this Mac can restore it.
Network
Zero network connections while PiBye imports, analyses or redacts. Checked on every release.

Signed and notarized by Apple. Hardened runtime. No PiBye account.

Who it’s for

For people who handle other people’s details.

  • Lawyers and paralegals

    Summarise files, draft letters, review contracts, client names out of the chat.

  • Immigration consultants

    Work through applications with UCI, passport and file numbers replaced.

  • HR

    Draft policies and letters from real cases without the employee’s name.

  • Accountants

    Check statements and draft client letters with names, SINs and addresses swapped out.

Anyone with confidential documents and an AI they want to use.

Included

The rest of the workflow.

  • Documents

    Your approved copies, ready to share.

  • Vault

    Originals and finished files, on your Mac.

  • Lock PDF

    Turn a fillable form into a flat PDF a client can read but not change. Now one click in the sidebar.

  • Desktop connections

    Hand approved copies to Claude Desktop or the ChatGPT desktop app.

  • Live AI drafting(paid)

    Draft inside PiBye with your Claude Code or Codex account. Placeholders are enforced on everything sent.

How Lock PDF works

Proof

Tested on 50,000 real documents. Results published.

documents processed
50,119
identifiers found by independent checks
84,037
still readable afterwards, all counted
24
filled with 6,000+ planted identifiers, zero readable
1,360 forms

PiBye can miss a detail, which is why you check the copy before it leaves, and it withholds scanned pages it cannot verify rather than guessing.

Read the full test record

Pricing

Try it free. Buy it once.

Your first 10 documents are free. After that it is $99 CAD once, with 12 months of updates. Renewing updates is optional, $39 CAD a year, and the app keeps working either way.

Free to try

$0first 10 documents

  • First 10 documents
  • Hide, check, send, restore and Lock PDF
  • No account, no card, no time limit
Download free for macOS

PiBye licence

$99CAD, one-time

  • Unlimited documents on one Mac
  • Live AI drafting with your Claude Code or Codex account
  • 12 months of updates
Buy PiBye · $99 CAD

The licence arrives by email. How the free trial works

FAQ

Questions people ask first.

Straight answers on where files go, what you approve, and how names come back.

All questions

How does the free trial work?

Download PiBye and use it. Your first 10 documents are free, including redact, review, restore, Lock PDF and the Claude Desktop and ChatGPT desktop app approved-copy connections. In-app Live AI drafting requires a paid PiBye licence. A document counts once, when PiBye first prepares it. There is no PiBye account, no card and no time limit, and free users still receive updates.

What happens after 10 documents?

When you go to prepare an 11th document, PiBye asks you to buy a licence: $99 CAD one-time, which unlocks unlimited documents and includes twelve months of updates. Nothing you already have is taken away: documents you have already prepared, your saved matters, Restore and Lock PDF are never blocked.

Does PiBye send my documents anywhere?

PiBye does not upload your original documents: it prepares and restores them locally and has no cloud relay. Anything you choose to share with an assistant has already been redacted and reviewed by you. This includes a reviewed copy sent through paid, opt-in Live AI drafting. When you enable the optional local connection to Claude Desktop or the ChatGPT desktop app, that assistant can read the approved Markdown Documents you select and submit generated Markdown for review. Your AI provider processes whatever copy you share with it, remotely.

Do I approve the replacements?

Yes. Each item can be approved, edited or kept. Required items must be resolved before you explicitly approve the final copy. A document with no detected items still needs your approval.

How is PiBye tested?

Against real documents and planted identifiers, and the results are published. The first battery ran 50,119 real public documents; independent checks found 84,037 identifiers and 24 were still readable after redaction; all 24 are counted and published, and they are number-shaped values from court filings. A second battery on harder material (completed forms, handwriting, French and Spanish) is still running and is not finished. Neither battery proves your document is clean: review every approved copy before sharing it.

How do I use PiBye with my AI?

Two ways. Copy the approved text into any AI chat, or connect Claude Desktop or the ChatGPT desktop app locally so they can read the approved copies you select. The connection runs on your Mac with no PiBye cloud relay, and the key to the real names never leaves your Mac. Your AI provider still processes what you share, which is the case with names and identifiers already replaced.

Who can use Live AI drafting inside PiBye?

In-app Live AI drafting is available with a paid PiBye licence and stays off until you turn it on in Settings. It uses your signed-in Claude Code or Codex account; Claude Desktop and the ChatGPT desktop app are separate approved-copy connections, not Live AI providers. The provider receives the reviewed copy you choose to send, while your original document and name mapping stay on your Mac. Renewing updates is optional and does not end your paid licence.

How do I restore returned work?

Open the same Document, choose the approved copy you shared, and drop the returned file into Restore. Review found and missing stand-ins, resolve any differences, then approve the final restoration. PiBye saves a separate restored file in the private Vault and preserves supported new text.

Can PiBye lock a fillable PDF form?

Yes. Lock PDF is built for sending completed forms to clients for review. It saves a static copy of each filled-in PDF form with every answer printed into the page and the fillable fields removed, so the client can check the answers but cannot retype, clear or reset them. The copy is saved beside the original as “(static).pdf”, and the original is not changed.

Is this a compliance certification?

No. PiBye's local processing and review controls are product behavior, not a certification or a guarantee that a particular use meets your professional obligations.

What if I stop renewing?

Nothing breaks. PiBye keeps working, with unlimited documents, exactly as before. You simply stop receiving new versions until you choose to renew for $39 CAD, which adds another twelve months of updates.

Use AI on client documents. Keep the names on your Mac.

Download PiBye and try it on your first 10 documents.

Free to try: your first 10 documents · then $99 CAD once, with 12 months of updates

1.0.10 · macOS 14.8.5 or later · Apple Silicon · 1.0 GB