Free PDF Sign and Fill, No Account, No Email Capture

A new client emails you a one-page services agreement. Sign, send back, move on. So you Google "free pdf sign and fill," click DocuSign, and twenty seconds later you are filling out a registration form that wants your phone number.

The pattern repeats. NDAs before job interviews. Lease renewals. W-9s for new clients. Permission slips for the kid's field trip. Each one is a single PDF and a signature, and each one ends with you handing your email to another company that keeps a copy of your signed contract on its servers, indefinitely, by default.

There is a smaller, less invasive way.

Quick answer: signing a PDF means stamping a signature image onto a finished document; filling one means typing into real interactive fields, or placing text boxes on a flat scan that has none. OxygenPDF does all three free, in your browser, with no account and no upload.

Two problems hiding under one search

"Sign and fill" sounds like one task. It is two, and the difference matters.

Signing means stamping a signature image onto a finished document. The text is locked. You drop a signature, maybe initial a few pages, maybe add a date. Done.

Filling depends on how the form was made:

• Real PDF form fields (AcroForms) — most IRS, USCIS, and DMV forms ship like this. The PDF has actual interactive fields you click and type into. Modern browsers and any decent PDF reader will let you fill them directly. AcroForm fields aren't a proprietary trick from one vendor; they've been part of the PDF specification itself since PDF 1.2, and every later revision through today's ISO 32000-2 standard carries them forward (Wikipedia, PDF). That's why filling one doesn't require any particular company's software.
• Flat or scanned forms — your landlord scanned a paper lease and emailed the result. There are no fields. It is a picture of a form. Filling means placing text boxes on top, which is annotation, not form-fill.

Knowing which case you are in saves a lot of hair-pulling. Click on a field, nothing happens? You have a flat form. You need an annotation tool, not a fillable-form tool.

OxygenPDF splits these into separate tools so the right one is obvious: our sign tool for signatures, the PDF editor for annotating flat forms, and PDF to Form when the fields are already there and you'd rather fill them as a web form.

Electronic signature vs. digital signature: they're not the same thing

People use these two terms interchangeably, and the mix-up causes real confusion about what a tool like this one actually does.

An electronic signature is any electronic sound, symbol, or process attached to a record that a person adopts with the intent to sign it — that's the exact definition the U.S. federal ESIGN Act uses, word for word: "an electronic sound, symbol, or process, attached to or logically associated with a contract or other record and executed or adopted by a person with the intent to sign the record" (15 U.S.C. § 7006). A typed name, a drawn scrawl, a click on "I agree" all qualify. What matters legally is the intent behind the mark, not the mark's technical sophistication.

A digital signature is a narrower, cryptographic thing. It's a mathematical scheme built on public-key cryptography that binds an electronic identity to the specific bytes of a document, so that changing so much as one character invalidates the signature (Wikipedia, Digital signature). A digital signature can't be lifted off one PDF and pasted onto another; it's cryptographically tied to the exact content it was applied to. Digital signatures are one way to implement an electronic signature, but most electronic signatures — including a drawn or typed signature image dropped onto a page — are not digital signatures.

Where does that leave a tool like this one? OxygenPDF's sign tool produces electronic signatures in the legal sense: a mark, applied with clear intent, on a specific document. It does not produce a cryptographic digital signature, and it makes no claim to. If you hold a signing certificate and need one, that's a separate tool, Digital Sign PDF, and our guide to digital signatures in PDFs covers how they differ. Neither does Adobe's free Fill & Sign, for what it's worth — a real PKI-backed digital signature usually comes from a dedicated certificate authority or a paid tier built around one. For the freelance contract or the lease renewal, the electronic signature is what the law actually requires. For a mortgage closing or a court filing with its own certification rules, check what that specific process demands before assuming either kind is enough.

Yes, e-signatures are legally binding

The legal question comes up every time. The answer is straightforward.

In the United States, the ESIGN Act took effect on October 1, 2000. Its core principle: a contract may not be denied legal effect, validity, or enforceability solely because an electronic signature was used. Four practical requirements: intent to sign, consent to do business electronically, association of the signature with the record, and record retention. Wills, adoption papers, and a handful of court notices are excluded. Most everyday contracts are not.

ESIGN isn't the only law doing this work. Most U.S. states run on their own version of the Uniform Electronic Transactions Act (UETA), a model statute that predates ESIGN and does much the same thing at the state level: it validates electronic records and electronic signatures for transactions governed by state contract law. UETA has been adopted, in some form, by 49 states plus the District of Columbia and the U.S. Virgin Islands (Wikipedia, Uniform Electronic Transactions Act). Between the two, an ordinary contract signed electronically inside the U.S. is almost always covered by one statute or the other, and usually both.

In the European Union, eIDAS Regulation 910/2014 defines three tiers of electronic signature: Simple, Advanced, and Qualified. Only Qualified is automatically legal-equivalent across all member states. For the freelance contracts and NDAs most people sign, Simple is sufficient and admissible.

What about courts? Federal Rule of Evidence 901 governs admissibility, and the standard is that you produce evidence the document is what you claim it is (Fenwick analysis). For a one-off contract, the document plus the email exchange plus your records usually clears that bar. For a seven-figure deal, pay for a service that produces a tamper-evident audit trail.

What the marketing pages bury

When you sign through DocuSign, DocuSign keeps a copy. By default, indefinitely. Their own help page is unambiguous: "Documents are automatically retained in your account indefinitely as long as the account is active" (DocuSign support). The same page lists their five regional data centers and notes the ongoing migration to Microsoft Azure (DocuSign privacy).

The documents are encrypted. The company holds the keys. They have a copy of every contract you ever signed, with your signature image attached, indexed by your email, sitting on infrastructure they control.

For an enterprise sales team, that retention is a feature. Legal, compliance, and audit teams genuinely need a searchable archive of who signed what and when. For a freelancer signing an invoice contract, the same retention is a liability dressed up as convenience — there is no compliance department on the other end asking DocuSign to keep that file.

What this currently costs

Prices below were checked directly against each vendor's own pricing page in September 2026. Subscription pricing moves, sometimes every few months, so treat the exact figures as a snapshot rather than a promise.

DocuSign's own page also states that paying annually rather than month-to-month saves "up to 33%," which is where the gap between a casual user's plan and a sales team's plan opens up: a freelancer signing two contracts a month is paying for the same 100-envelope-a-year allowance a small sales team burns through in three weeks.

The market itself is mainstream. DocuSign's own published figures — a vendor selling this workflow, so read them as marketing claims rather than independent research — put 95% of organizations as using, evaluating, or planning to purchase e-signature, and say about four in five agreements on its platform are signed within 24 hours. But the pricing on every plan above assumes you are a salesperson or a lawyer sending dozens of envelopes a month. There is a gap between "I sign two contracts a month" and "I run a sales org," and that gap is what most of these tools refuse to serve cleanly.

How OxygenPDF does it

The PDF loads into your browser's memory and never leaves it. There's no server-side step at all: the file is read, rendered, and edited on your device, and the result downloads straight from there.

To sign a contract:

1. Open the sign tool.
2. Create a signature. You get three ways to do it: draw it with a mouse, trackpad, or finger; type your name and pick one of three script fonts (Dancing Script, Pacifico, Great Vibes); or upload an existing signature image. Whichever you choose, it's saved in your browser's local storage so it's there the next time you open the tool on the same device — nobody's server remembers it, but yours does.
3. Click anywhere on the page to drop the signature, then drag it into position or resize it. For a multi-page contract that needs initials on every page, place the initial yourself on each page; there's no "stamp every page" auto-fill, and honestly, for a five-page NDA that's a two-minute job either way.
4. Download. The signature is rendered directly into the PDF's page content as an embedded image — it's part of the document from that point on, not a floating overlay a future viewer's software might drop.

To fill a flat scanned form:

1. Open the PDF editor.
2. Click anywhere to add a text box, type your answer, then reposition or resize it to line up with the printed field. The editor also has a whiteout tool, which is the fix if you type in the wrong spot or need to correct a mistake before it's baked into the export — cover the error, then place a fresh text box next to it rather than starting the whole form over.
3. Download.

To fill a form that already has fields:

1. Open PDF to Form.
2. Drop the PDF. Its AcroForm fields come back as a plain web form — text inputs, checkboxes, dropdowns, and radio buttons, each labeled from whatever the original field name suggests — that you can read comfortably on a phone screen instead of pinch-zooming a PDF viewer.
3. Fill it. Download it. Your answers get written straight back into the original form fields, so the file that comes out still has the same interactive fields the file that went in had, just populated.

One limitation worth knowing before you're surprised by it: if a fillable form has a dedicated PDF signature field — the kind built specifically to hold a certificate-backed signature — PDF to Form skips it on purpose, since a signature field doesn't translate into a sensible web-form input. Fill the rest of the form there, then handle the signature separately with the sign tool, or with whichever process actually issues the certificate that field expects.

Building fillable fields into a flat page is the harder direction. The guide on creating fillable PDFs covers it.

Password-protected PDFs: what actually happens

A fair number of the documents this article is about — bank-issued lease addenda, HR-sent tax forms, anything from an institution — arrive password-protected. The sign tool and the PDF editor handle that case cleanly: enter the password when asked, and everything downstream works exactly like it would on an unprotected file.

Here's why, and where the one real exception is. Under the hood, a protected file is decrypted by rendering every page and rebuilding a new PDF from those renders — invisible for a tool that's only stamping a signature image or a text box on top of a page, since it makes no difference whether the page underneath is real vector content or a rendered image. What that rebuild can't carry over is the original file's interactive form fields, because a fresh PDF built from page images has nothing to copy them from. That's the gap: a password-protected PDF with genuine fillable AcroForm fields will currently come back from PDF to Form reporting no fields at all, even though the form has them. Until that's fixed, treat a locked fillable form like a flat one — open it in the PDF editor instead and place text boxes over each field by eye. You'll be typing in the right spot even though you're not writing into the underlying field object.

The honest trade-off

The sign tool does not produce an audit trail, and it doesn't produce a cryptographic digital signature in the sense described above. There is no timestamp from a Qualified Trust Service Provider, no tamper-evident certificate, no multi-party orchestration, no record of IP addresses and click timestamps sitting on a server somewhere. For a freelance contract or an NDA, the ESIGN Act's four requirements are still satisfied through the document, the email thread, and your normal records — an electronic signature has never required a digital one. For a deal you might litigate, or a process that specifically calls for a Qualified signature under eIDAS, use a service built around that.

This replaces the printer-scanner-email loop. It doesn't replace the corporate procurement workflow that genuinely needs sequenced multi-party routing and a compliance-grade paper trail. Different problem, different tools.

FAQ

Is a PDF signed with a free tool like this legally binding?

Yes, for the vast majority of everyday contracts. Under the U.S. ESIGN Act and the state-level UETA, an electronic signature carries the same legal weight as a wet-ink one as long as there was clear intent to sign, consent to do business electronically, and the signature is tied to the record. The exceptions are a short, specific list — wills, some court notices, a handful of other document types — not ordinary business agreements.

Do I need to pay to sign or fill a PDF?

No. Signing means placing an image of your signature onto a document, and filling a form means typing into existing fields or adding text boxes — neither requires the server-side infrastructure that justifies a subscription. OxygenPDF's sign tool, editor, and PDF to Form do all three for free, entirely in your browser.

What's the actual difference between signing and filling a PDF?

Signing places a fixed signature image onto a document whose text is otherwise locked. Filling adds information to a form — either by typing into real interactive fields the PDF already has, or by placing text boxes on top of a flat, scanned page that has no fields at all. They use different tools because they're different operations on the file.

Does OxygenPDF see or store my signed documents?

No. The PDF is read and edited in your browser's own memory, and the signed or filled file downloads directly from there. Nothing is uploaded to a server, so there's no copy sitting anywhere to retain, breach, or subpoena later. Your saved signature itself lives only in your browser's local storage on that device.

Can I reuse my signature the next time I sign something?

Yes, as long as you're using the same browser on the same device. Signatures created with the sign tool are saved to that browser's local storage, not to an account, so they're there next time you open the tool — but they won't follow you to a different browser or a different computer, since nothing about them is synced anywhere.

Does this work on a password-protected PDF?

The sign tool and the PDF editor do, without any extra steps: enter the password when prompted and continue as normal. PDF to Form is the exception — a protected file has to be rebuilt from rendered page images before it can be processed, and the original interactive form fields don't survive that rebuild, so a password-protected fillable form currently comes back reporting no fields. If that happens, fall back to the PDF editor and place text boxes over the fields by eye instead.

What if the PDF has a signature field built in — can I still fill it as a web form?

Mostly. PDF to Form converts every other AcroForm field type into a web input, but it intentionally skips dedicated signature fields, since those exist to hold a certificate-backed signature that a plain form input can't represent. Fill everything else through the form, then add your signature on top separately.

Is this suitable for a contract I might end up in court over?

For most disputes, yes — Federal Rule of Evidence 901 only requires evidence the document is what you say it is, and the document plus your email trail usually clears that. For a high-stakes deal where you specifically want a tamper-evident audit trail or a Qualified electronic signature under eIDAS, that's exactly the case a paid service with certificate-backed signing exists for, and it's worth the cost for that one document.

The freelance contract, the lease, the W-9, the NDA — none of those need a $30-a-user monthly subscription or a stranger's server holding a copy forever. They need a signature you control and a download you keep. That is what the sign tool is for.