Free online PDF signature tool. Type, draw or upload your signature, place it on any page of any PDF, and download the signed file instantly. No account. No watermark. No installation.
Sign PDF documents online for free in seconds. Upload your file, type, draw or upload your signature, drag it where you need it, and download the signed PDF instantly. There is no registration, no watermark on the signed file, no page limit, and no software to install. OneClickPDF Sign PDF works in any modern browser on Windows, macOS, Linux, iOS and Android, and the signature you produce is legally valid under the US ESIGN Act, the UK Electronic Communications Act, and the EU eIDAS Regulation.
Last updated: April 2026
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The full sign-and-download workflow takes most users under 60 seconds. The tool does not require account creation or email verification — drop your file in and you are signing within 5 seconds.
Drag your PDF onto the upload area, or click 'Choose PDF File' to browse from your device. Files up to 100 MB and 500 pages are supported. Files are processed locally in your browser — no upload to a server is required.
Pick one of three ways to create your signature: type your name and pick from 12 handwriting fonts, draw with your mouse, trackpad or finger on a touchscreen, or upload a transparent PNG of your handwritten signature. The signature is stored locally during the session — it is never sent to a database.
Click anywhere on the PDF page to drop the signature, then drag to reposition or pull the corner handles to resize. You can place multiple signatures, add initials, today's date, and editable text fields anywhere on any page.
Click 'Apply & Download'. The signed PDF is generated in your browser and downloaded directly. The signature layer is flattened so it cannot be moved or removed by anyone receiving the file. Files stay in your browser the entire time; the optional Sign from Phone feature uses a 10-minute server session that expires automatically.
Pick the method that fits the device you’re on. All three produce a transparent signature image you can place anywhere on the page.
Type your name and pick from 12 handwriting fonts including Caveat, Dancing Script, Great Vibes, and Sacramento. Fastest method on desktop or mobile when you do not have a saved signature image. The font is rendered as a vector signature so it scales cleanly at any size.
Draw a signature freehand with your mouse, trackpad, finger, or stylus. Optimised for touchscreens on iPhone, iPad, and Android, plus Wacom-style stylus input on tablets. The most authentic-looking option since the result mirrors how you actually sign.
Sign a sheet of white paper, photograph it with your phone or scanner, and upload the image. The tool removes the background and produces a clean, transparent signature ready to drop onto any PDF page. Or upload a pre-made transparent PNG signature you already have on file.
Yes — under three major legal frameworks covering the United States, European Union, and United Kingdom plus most of the Commonwealth. OneClickPDF signatures qualify as Simple Electronic Signatures (SES), valid for the vast majority of business documents.
Under the Electronic Signatures in Global and National Commerce Act of 2000 (ESIGN Act), electronic signatures have the same legal validity as handwritten ones for federal interstate commerce. The Uniform Electronic Transactions Act (UETA), adopted by 49 of 50 states (New York uses a parallel statute), governs intra-state contracts. OneClickPDF signatures qualify as Simple Electronic Signatures suitable for most consumer and business contracts.
Regulation (EU) 910/2014 (eIDAS) establishes three signature levels across all 27 member states: Simple Electronic Signature (SES), Advanced Electronic Signature (AdES), and Qualified Electronic Signature (QES). OneClickPDF produces SES, suitable for most contracts, NDAs, and consent forms. AdES and QES require additional certificate-based identity binding via a Qualified Trust Service Provider.
The UK Electronic Communications Act 2000 (with post-Brexit amendments) gives electronic signatures the same evidential weight as wet-ink signatures. Most Commonwealth jurisdictions have parallel frameworks: Australia (Electronic Transactions Act 1999), Canada (PIPEDA plus provincial statutes such as Quebec’s Act to Establish a Legal Framework for Information Technology), and India (Information Technology Act 2000).
Unlimited PDF signing with no daily, hourly, or page limits, ever.
Sign within 5 seconds of arriving — no email verification, no credit card.
The signed file is clean output — no OneClickPDF logo, branding, or 'sample' overlay.
100% browser-based — files never uploaded. Optional Sign from Phone uses a 10-minute encrypted server session.
Compliant with US ESIGN Act, EU eIDAS Regulation, and UK ECA 2000.
Works in any modern browser on Windows, macOS, Linux, iOS and Android.
Type, draw, or upload — pick the method that fits your device and document.
Add multiple signatures, initials, dates, and text fields on a single document.
A capability-by-capability comparison across the four alternatives most users evaluate alongside OneClickPDF for online PDF signing.
| Feature | Smallpdf | PDF24 | Sejda | Adobe Sign | Ours |
|---|---|---|---|---|---|
| Free, unlimited signing | 7-day trial | ✓ (with ads) | 3/hour limit | Paid only | ✓ |
| No watermark | ✓ | ✓ | ✓ | ✓ | ✓ |
| No account required | Trial sign-up | ✓ | ✓ | Account required | ✓ |
| No software install | ✓ | ✓ (web) | ✓ | ✓ | ✓ |
| File auto-delete | 1 hour | 1 hour | Same session | User-managed | Files never uploaded |
| TLS encryption | TLS 1.2+ | SSL/TLS | TLS 1.2+ | TLS 1.2+ | TLS 1.3 (page only) |
| Mobile signing | App needed | Browser | Browser | Browser + app | Native browser |
| Multi-party signing on one file | Sign.com tier | ✗ | Limited | ✓ | No (manual only) |
| Audit trail / Cert. of Completion | Sign.com tier | ✗ | ✗ | ✓ | ✗ |
| File size cap | Limited | Generous | 50 MB | Generous | 100 MB |
| Page count cap | Limited | Generous | 50 pages | Generous | 500 |
| Pricing for full access | USD 9+/mo | Free | USD 7.50+/mo | USD 14.99+/mo | Free |
Competitor information was accurate at time of publication and may have changed.
Bottom line: OneClickPDF wins for individuals and small businesses who need fast, friction-free signing without paywalls or registration. Adobe Sign is the only viable choice when you need full audit trails and Certificate of Completion documentation for regulated workflows.
The vast majority of business signing activity falls into one of these five categories — all served by Simple Electronic Signatures, all valid under ESIGN, eIDAS, and UK ECA frameworks.
Service agreements, scope-of-work documents, and rate sheets. Independent consultants and contractors close deals faster when the signature is one click away — no print, sign, scan, return cycle.
Non-disclosure agreements between businesses, contractors, and partners. Protect confidential information without printing, scanning, and emailing back. Both parties sign on whichever device is convenient.
Employment offers, internship agreements, and freelance engagement letters. HR teams send a signed PDF the moment terms are agreed — candidates counter-sign and return on the same screen.
Lease agreements, rental applications, and property disclosures. Tenants and landlords exchange signed copies without meeting in person — particularly useful for remote leasing and property management.
Patient consent forms, HIPAA acknowledgements, and treatment authorisations. Clinics share signed documents with the patient and the records system without paper, while keeping the file fully on the patient’s device until they download.
An electronic signature is any electronic mark that demonstrates intent to sign — a typed name, a drawn signature, an uploaded image, or even a checkbox ‘I accept’. A digital signature is a specific subset that uses Public Key Infrastructure (PKI) and an X.509 digital certificate (RFC 5280) to cryptographically bind the signer’s identity to the document, producing a tamper-evident hash that detects any post-signing modification. Both are legally valid in most jurisdictions; digital signatures provide stronger non-repudiation and are required in regulated workflows such as pharmaceutical submissions, court filings, and certain government procurement processes. OneClickPDF produces an electronic signature, suitable for the everyday contracts, NDAs, offer letters, and consent forms that account for the vast majority of business signing activity.
Upload your file, drop a signature, download — under 60 seconds, no account, no watermark.
Start signing nowProtect PDF
Add 256-bit AES password protection to any PDF with one click. Or remove an existing password from a PDF you own — instantly, in your browser.
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Permanently black out names, account numbers, addresses, or any sensitive content before sharing. Redactions are baked into the file — not just overlaid.
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Fill in existing PDF form fields without any software — type into text fields, check boxes, select dropdowns. Or create a brand-new fillable PDF form by adding text fields, checkboxes, and dropdowns to any PDF.
Flatten PDF
Bake all annotations and form fields permanently into the PDF.