PDF Form Filler

Many official PDFs are actually fillable forms - AcroForms in the jargon. But most viewers show the fields poorly, and in the end you print the thing out and fill it by hand anyway. PDF Form Filler flips that around: it finds every field and presents you a tidy input mask.

The tool recognises the four common field types. Text fields for names, addresses and free text, checkboxes for yes-no answers, dropdowns for preset options and radio buttons where exactly one of several choices applies. Each field is listed with its name so you go through them in order instead of hunting for invisible click zones in the PDF.

Beyond the plain field view there is a JSON view of the fields, handy for anyone who wants to prepare forms programmatically or check which field names a PDF even has. That way you understand a form's structure before you fill it.

If a PDF has no fillable fields, the tool tells you clearly - either it is a plain scan without a form layer, or the fields have already been locked, which is called flattening. Then you know you need the PDF Editor for annotations or the document scanner instead.

For normal forms everything runs locally in your browser with pdf-lib, your filled PDF is not uploaded. For very large files there is an optional server mode. Especially with forms containing personal data - applications, registrations, declarations - it is reassuring that your entries do not have to leave your device.