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Sign a Fillable PDF Form Online

Fill out the blanks and add your signature to any standard fillable PDF — free, no account, no upload. One honest limit: forms built with Adobe’s older XFA format aren’t supported yet.

Sign your PDF form

Most “fillable PDF forms” people mean — applications, intake sheets, W-9s, release forms — are built on the standard AcroForm format. This tool signs those the same way it signs any PDF: you place your typed answers, checkboxes, and signature directly on the page, so it doesn’t matter whether the form has real fields, no fields, or is a flat scan.

How it works

  1. 1. Open your form

    Drop in the PDF. It’s read right in your browser — nothing is uploaded to a server.

  2. 2. Fill and sign

    Type your answers over the form’s blanks, check the right boxes, and add your signature where it’s asked for.

  3. 3. Download

    Get the completed form back instantly as a PDF, saved straight to your device.

XFA forms aren’t supported — here’s the fix

A small share of forms — mostly older government and legal paperwork built with Adobe LiveCycle Designer — use a format called XFA instead of standard PDF fields. XFA forms aren’t supported yet, so uploading one here will be rejected.

The fix takes under a minute: open the form in your PDF viewer (or Adobe Reader/Acrobat) and choose Print → Save as PDF (or “Print to PDF”). That produces a standard, flattened copy with the same layout — upload that copy instead and it’ll work like any other PDF.

Is this legally valid?

For ordinary forms, a typed or drawn signature is legally recognized in the US (ESIGN/UETA), the EU and UK (eIDAS), and many other countries. This tool gives you a normal, self-signed PDF with your filled-in answers and signature on it.

What it does not add is an audit trail or tamper-evident seal — so it offers limited evidence of who filled and signed the form if that’s ever challenged.

Need proof of who filled it out and when, or need someone else to fill and sign their own copy? Create a free Evenseal account. This is not legal advice.

Need someone else to fill out and sign the form too?

Send a form for someone else to fill and sign and get back a sealed, certified copy with a verifiable audit trail. Free to start — one flat price when you’re ready to send without limits.

Sign your PDF formSee pricing

Frequently asked questions

What’s the difference between an AcroForm and an XFA form?+
AcroForm is the standard, widely-supported fillable-PDF format — the text boxes, checkboxes, and dropdowns you see in most application forms, tax forms, and intake sheets. XFA is an older, less common Adobe format (built with Adobe LiveCycle Designer) used mostly by some government and legal forms; it stores the form as XML rather than standard PDF fields. This tool signs and fills standard PDFs — including AcroForm forms — but doesn’t yet support XFA.
Does this tool actually fill in the PDF’s underlying form fields?+
No — and that’s deliberate. Instead of reading and writing each form field individually, you place your typed answers, checkboxes, and signature directly on the page, exactly where they need to go. That means it works the same way whether the PDF has real AcroForm fields, no fields at all, or is a flat scan. Filling a PDF with no fields at all.
My form won’t upload — it says something about a "special interactive form."+
That means it’s an XFA form, which isn’t supported yet. The fix is usually quick: open the PDF in your PDF viewer (or Adobe Reader/Acrobat) and use Print → Save as PDF (or "Print to PDF") to make a standard, flattened copy — then upload that copy here instead.
Is a self-signed fillable form legally valid?+
For most everyday forms, yes — a typed or drawn signature is a valid electronic signature under laws like the US ESIGN Act and UETA and the EU/UK’s eIDAS rules. This free tool produces a self-signed document with no audit trail, so it offers limited proof if a signature is ever disputed. Don’t use it for wills, deeds, or forms that legally require notarization or a witness. Are electronic signatures legal?.

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