How to create fillable PDF forms in 5 minutes
A practical, no-jargon walkthrough for building interactive PDF forms — text fields, checkboxes, dropdowns, and signatures — for free, 100% in your browser.
Why fillable PDFs still win
Web forms are great — until a client needs a signed copy for their records, or your ops team needs a document that survives email, print, and archive. Fillable PDFs solve both: interactive on screen, portable everywhere, and legally binding when signed.
Step-by-step
1. Start with your document
Open a blank page or drop an existing PDF (invoice, contract, intake form). The original layout stays exactly where it is — you only add an interactive layer on top.
2. Place your fields
Drag text inputs onto every blank line, checkboxes next to options, radio groups for single-choice questions, dropdowns for lists, and signature widgets where a signer should sign.
3. Name every field clearly
Use short, meaningful names: full_name, email, invoice_date, signature_client. Clean names make CSV/FDF export readable and let you pre-fill fields programmatically later.
4. Set required fields and defaults
Mark critical fields as required so recipients can't submit an empty form. Pre-fill dates, company names, or currency to save the signer time.
5. Export and share
Save the fillable PDF. It opens in Adobe Reader, macOS Preview, Chrome, and every mobile PDF app. Recipients complete it, save, and email back — or you collect submissions via FDF/CSV export.
Field types cheat sheet
Common pitfalls to avoid
- • Duplicate field names — two fields with the same name auto-mirror. Great for date on every page, terrible for two different totals.
- • Tiny hit targets — checkboxes under 14px frustrate mobile signers. Keep interactive elements at least 16px.
- • No tab order — set logical tab order so keyboard users move through the form the way you'd read it.
- • Flattening too early — save a fillable copy before flattening. Once flattened, fields become static artwork.
FAQ
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