A Free Alternative to Adobe Acrobat for Signing, Protecting, and Redacting PDFs

Most people don't install Adobe Acrobat because they want a PDF editor — they install it because one specific task came up: a lease needs a signature, a payslip needs a password before it goes over email, an account number needs to disappear before a document gets shared. That's a lot of software (and often a subscription) for a job that takes thirty seconds in a browser tab.

The three jobs that send people to Acrobat

• Getting a signature onto a lease, NDA, or form without printing and scanning it back in.
• Putting a password on a PDF before it goes anywhere sensitive, like email or a shared drive.
• Blacking out an account number, SSN, or address before a document goes to someone else.

Signing a PDF

1. Open the Sign PDF tool and upload your document.
2. Draw your signature or upload an image of it, then drag it into place.
3. Download the signed file. No printer or scanner needed.

This places a visible signature image on the page, which is what most everyday paperwork actually needs. It isn't a certificate-based digital signature, so it's not a swap for something like Acrobat Sign or DocuSign on documents that specifically require one.

Password-protecting a PDF

1. Open the Protect PDF tool and upload your file.
2. Choose a password to lock the document.
3. Download the protected PDF, encrypted with AES-256, the same standard Acrobat uses.

If you're on the receiving end of a protected file and just want it to stop prompting for the password every time, the Unlock PDF tool strips the protection back off, provided you have the password.

Redacting a PDF

1. Open the Redact PDF tool and upload your file.
2. Type the names, numbers, or phrases to black out.
3. Download the result. Matching pages are flattened, so the text underneath is gone, not just covered.

That last part matters: drawing a black rectangle over live text in a cheap editor leaves the original text selectable and copyable underneath it. This flattens the page to an image instead, so there's nothing left to recover.

What this isn't

None of this is a full PDF editor. There's no annotation, no form-filling, no rewriting the body text of a page — if that's what you actually need, Acrobat (or another editor) still has a job to do. But for the three tasks that usually trigger the Acrobat install in the first place, there's no reason to install anything.

Common questions

Do I need to install anything or sign up?

No. All three tools run in the browser tab you're already in — no software, no account, no email address required.

Is this as secure as Acrobat?

For encryption, yes — Protect PDF uses the same AES-256 standard. For signing, it places a signature image rather than a certificate-based digital signature, so keep using a dedicated e-signature service for documents that legally require one.