Sign PDF Free Online — Draw, Type or Upload
Sign any PDF in seconds — free, no account, and nothing to download. Draw your signature with your mouse or finger, type your name, or upload a saved signature image. Place it anywhere on your document, resize if needed, and download your signed PDF instantly. Works on iPhone, Android, and every desktop browser.
Is an electronic signature on a PDF legally valid?
Yes — in most countries, an electronic signature on a PDF is fully legally binding. Here is how the major legal frameworks apply:
United States: The ESIGN Act (Electronic Signatures in Global and National Commerce Act) and UETA (Uniform Electronic Transactions Act) establish that electronic signatures are legally equivalent to handwritten signatures for the vast majority of contracts and agreements. View the ESIGN Act on the US government website →
European Union: Under eIDAS (Electronic Identification and Trust Services regulation), electronic signatures are legally recognized across all EU member states for standard commercial agreements.
United Kingdom: The Electronic Communications Act 2000 and subsequent guidance from the Law Commission confirm that electronic signatures are valid and enforceable in the UK.
Exceptions to be aware of: Certain document types in specific jurisdictions may require a wet (handwritten) signature — these typically include wills and testaments, real estate title transfers, court orders, and notarized documents. When in doubt about a specific document type, confirm the requirements with a legal professional.
For everyday use — contracts, NDAs, service agreements, lease agreements, employment forms, freelance proposals — an electronic signature placed with Transfonic is legally sufficient in the US, EU, UK, and 180+ other countries.
When to use a free tool vs a paid e-signature platform
A free browser-based tool like Transfonic covers the majority of everyday signing needs. Here is an honest breakdown of when each approach fits best:
Use Transfonic when:
You are signing a document yourself (not requesting signatures from others)
The document is a standard contract, NDA, agreement, or form
Privacy matters — your file should not be stored on a third-party server
You need to sign quickly without creating an account
You are on a phone and need to sign with your finger right now
Consider a paid platform (DocuSign, Adobe Sign, HelloSign) when:
You need to collect signatures from multiple parties in sequence
You need a full audit trail with time stamps and IP logging
Your industry requires certificate-based digital signatures (e.g. regulated financial services, some healthcare workflows)
You need to send automated reminder emails to signers
The honest truth: for 90% of individual and small business signing needs, a free tool is entirely sufficient. Paying $25–$50 per month for DocuSign when you sign 3 documents a week is unnecessary.
Five things that make your signed PDF harder to dispute
Signing a PDF is straightforward. Making that signature hold up if it is ever questioned takes a few extra steps — none of them complicated. Here is what actually matters:
1. Fill every field before you sign
An incomplete document with a signature on it raises immediate questions. If your name, date, address, or any other required field is blank, the other party could argue the document was not properly executed. Fill in all form fields or add any missing text directly onto the page before placing your signature. A complete document signed once is far cleaner than a signed document with handwritten additions made afterward.
2. Add the signing date next to your signature
The date is not always a required field in a PDF — but it should always be on the document. Type today's date directly next to or below your signature so the signing date is embedded in the document itself, not just in an email thread. Use Add Text to place it precisely where it belongs.
3. Number the pages
A signed 10-page contract with no page numbers can have pages added, removed, or swapped without obvious detection. Numbered pages make the document structure visible and any interference immediately apparent. Add page numbers to your PDF before signing on any multi-page contract, lease, or agreement. It takes 30 seconds and adds meaningful integrity to the document.
4. Keep the unsigned original
Always save a copy of the PDF before you sign it. This lets you prove exactly what the document said at the time you agreed to it — which matters if the other party later claims the terms were different. Store the unsigned version separately from the signed one, labelled clearly.
5. Match your signature to your legal name
Your drawn or typed signature should be consistent with the name that appears in the body of the document. If the contract references "Sarah J. Thompson" and your signature bears no connection to that name, you have weakened the link between the signatory and the agreement. Type your full legal name if using the type method, or draw something that resembles your actual signature.
Prepare your PDF before signing
Before adding your signature, you may need to complete or mark up the document. Transfonic's full Annotate toolkit handles every step in one place:
Fill PDF form fields — complete any fillable form fields before signing, so the document is fully filled out and signed in one session.
Add text to your PDF — type your name, date, or address directly onto the page if the document has no fillable fields.
Highlight sections — mark up clauses or sections before signing so the other party can see what you have reviewed.
Add page numbers to your PDF — for multi-page legal documents, number the pages before signing so every page is clearly referenced.
Insert an image into your PDF — add a company logo, stamp, or letterhead before signing for a professional finish.
Related PDF tools
Fill PDF Form: Complete fillable form fields before adding your signature.
Add Text to PDF Type directly onto your PDF — name, date, address — before signing.
Highlight PDF markup sections for review before or after signing.
Insert Image into PDF: Add a logo, stamp, or letterhead image to your document.
Add Page Numbers to PDF. Number the pages of a multi-page legal document before signing.
Draw on PDF Annotate freehand — circle, underline, or mark sections.