Worth reviewing · §14(b)

Leaving early costs more than you might expect.

You'll need to give 60 days' written notice and pay a fee equal to two months' rent — on top of any rent you still owe. Most leases ask for 30 days' notice without a separate fee. If you think you might move within the term, this is the clause to negotiate first.

§14(b) "Tenant shall provide not less than sixty (60) days' written notice…"
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Free. Donate only if it helped.

How it works

Three steps. Nothing leaves your browser.

Attach a PDF the way you always do. The add-on redacts it in your browser, you review, and the AI only ever sees the redacted version.

Step 01

Attach your PDF like you always do

On ChatGPT, Gemini, or Claude, attach a PDF the way you normally would. The add-on quietly intercepts the upload before it leaves your browser.

Step 02

It finds and removes sensitive details, in your browser

Names, addresses, account numbers, government IDs, company names — found locally with pattern matching and an on-device name detector. Nothing is uploaded to do this.

Step 03

Review, then share the redacted version

You see exactly what will be removed and can adjust it. The add-on swaps your file for redacted-document.md, so the AI only ever sees the redacted text — along with ready-made prompts to explain the document in plain language.

Why local-first

Privacy isn't a policy. It's the architecture.

Most AI tools ask you to trust them. We'd rather show you the pipeline that runs in your browser.

Detection happens in your browser

PDF parsing, pattern matching, and the name detector all run locally on your device. The model is bundled with the add-on and never calls out.

Only the redacted file is shared

Your original PDF is held back the moment it's detected, and only re-attached if you explicitly choose "Use original." The AI sees redacted-document.md — not your file — and the original stays blocked until proof shows the redacted file is present and the original absent.

You decide what gets removed

You review every detection and can toggle items off or add your own before anything is shared. No black boxes.

No accounts. Ever.

No login, no payment, no email. It's free — and if it helped, you can leave an optional donation. Nothing else.

Use it for

The documents you actually have to sign.

Leases & rental agreements

Notice periods, automatic renewals, deposit terms, who fixes what.

Employment offers & severance

Non-competes, IP assignment, equity vesting, separation clauses.

NDAs & vendor contracts

Term length, scope of confidentiality, mutual vs one-way obligations.

Terms of service & EULAs

Arbitration clauses, data rights, what changes if they update the terms.

Insurance & medical forms

Coverage limits, exclusions, what counts as "pre-existing."

Anything else with fine print

If it has a signature line, you should know what's above it.

Questions, answered

The things people ask before they install.

Does my document really stay in my browser?

Yes. Reading the PDF, finding sensitive information, and the name detector all run locally in your browser. Only the redacted Markdown — with names, addresses, account numbers, and government IDs already removed — is attached to your AI chat.

Do I need an account?

No. There's no login, no account, and no payment. Install the add-on and start using it right away.

Is this legal advice?

No. DocsUnderstood helps you understand what a document says — it doesn't replace a lawyer. For high-stakes situations, take what you've learned here and bring it to one. You'll have better questions to ask.

What kinds of files can I use it with?

Text-based PDFs. Scanned or image-only PDFs and password-protected PDFs are out of scope for now. It works when you attach a PDF on ChatGPT, Gemini, or Claude.

What does it cost?

It's free. There's no charge and no subscription. If it helped, you can leave an optional, pay-what-you-want donation — only if you want to.

Which AI chats does it work with?

ChatGPT (chatgpt.com and chat.openai.com), Gemini (gemini.google.com), and Claude (claude.ai). When you attach a PDF on any of these, the add-on steps in before it leaves your browser.

Which browsers?

Chrome and Edge at launch. Firefox isn't available yet.

What languages are supported?

The interface and the ready-made "understand this document" prompts are available in English, Korean, Chinese, Spanish, Hindi, and French.

Read what you're signing.
Before you sign it.

It's free. Install it once and it protects your PDFs in the browsers you already use. Donate only if it helped.

Free to use. If it helped, you can support the project.