How to fill in a PDF form: a step-by-step guide

Drop the PDF anywhere on the page, or press Add files - one form or several; each keeps what you typed into it. The form opens big in the middle with a box on every field, and the rail lists the fields.

• Text fields - click and type; Tab moves to the next field.
• Check boxes - click to tick, click again to clear.
• Drop-downs and lists - pick an option.
• Radio buttons - pick one of the group; a click on the chosen one clears the group.

Names with ő, ű, č or ł are written correctly: when a value needs letters the form's own font doesn't have, a font that has them is added to the file.

• Lock the values in (on by default) - the values become part of the page. Nobody can change them, and every viewer and printer shows exactly the same thing. Right for a form you hand in.
• Switched off, the result stays a fillable form: the values can be changed later, by you or by the next person.

Clear what I typed in this file empties the fields again.

Press Fill in the form. The line under the button counts the filled fields. The form is saved to your device at once - several forms together as a ZIP; the button then says Saved and turns into Save, which saves it again.

• No form - the PDF only looks like a form; it has no fields to type into. Write on it with Edit PDF, or turn it into a real form with Create fillable PDF.
• Signature fields only - a signature field is signed with a certificate: Digitally Sign PDF.
• XFA form - a form type most PDF viewers can't display; its fields can't be filled reliably, so the tool says so instead of saving a file that looks empty elsewhere.

Without an account, and with a free one, you can fill two forms in a run, each up to 15 MB. With Pro there is no limit on the number or the size. What you type is your data: it is never stored or sent anywhere.

• A signature on the filled form? Sign PDF.
• Lock an already filled form later? Flatten PDF.
• Make your own fillable form? Create fillable PDF.