PDF Form Filler
Type into an existing PDF's own form fields and download a new filled copy.
- Free
- No signup
- Files stay in your browser
Browser onlyYour data never leaves this device.
Every step runs in your browser: the file is parsed, its fields are read, and the filled copy is written and encoded on your own device. Nothing is uploaded, no copy is stored anywhere, and the original file you chose is never modified — this tool writes a new document and leaves yours as it was.
Details: Privacy policy
Input
Drop files here or Browse
Drag and drop works here too.One non-encrypted PDF up to 100 MB and 1,000 pages, with fillable fields.
Result
No form yet.
Choose a PDF with fillable fields. The download is always a new file.
PDF Form Filler writes into a PDF's own interactive fields — the text boxes, checkboxes, radio groups, dropdowns and option lists the document already declares — and hands back a new filled copy. It reads the form structure first, so you see the fields the file really has rather than a template of guessed ones: a text field with its declared maximum length, a checkbox that is already ticked, a dropdown with its actual choices. Values are written into the document's field dictionaries with the same library that parses it, and an optional flatten step bakes them into the page content for printing or for a viewer that does not support forms. Because parsing, filling and serializing all happen in your browser, the file never travels: there is no upload, no temporary copy and no server-side original to modify. The file you picked stays exactly as it was, the download is a separate document, and the page says so before you start rather than after. It reads the field dictionary the document itself carries rather than guessing from the appearance of the page: a checkbox that arrives ticked stays ticked, a dropdown offers exactly the choices the file declares, and a text field whose author set a maximum length shows that ceiling before you type past it. Button and signature fields are listed but deliberately left alone, because appending a signature is a different job with different consequences. When a file has no field layer at all - a scan, or a form somebody flattened before sending it to you - the page says so in plain words instead of handing back a document that merely looks completed.
How to use PDF Form Filler
- Choose one PDF that has fillable fields; the page lists the fields it finds and their current values.
- Type, tick or choose a value for each field you need, and leave the rest alone.
- Decide whether to flatten, then generate and download the new filled copy.
When to use PDF Form Filler
- Fill a tenancy or onboarding form you received as a PDF, without printing it, signing by hand and scanning it back in.
- Complete an expense or timesheet template on a phone, then flatten it so the figures cannot be edited by whoever receives it.
- Prefill a repeated supplier or client form from the same answers and keep a clean, flattened copy for your records.
Frequently asked questions about PDF Form Filler
Does filling a form change my original PDF?
No. The file is read into memory, a new document is written from it, and only that new document is offered as a download. The original on your disk is untouched, and there is no server copy to be changed either — the work happens in your browser.
Why does the tool say my PDF has no fillable fields?
Because the document does not contain an interactive form layer. A scan, a print-to-PDF export, or a form whose fields were flattened before you received it has visible boxes but no fields to write into. This tool reports that instead of producing a file that looks filled but is not.
What does flattening do, and when should I use it?
Flattening draws the values into the page content and removes the interactive fields. Use it when the file is going to be printed, or when the recipient should not be able to change the answers. Skip it if the person receiving the document still needs to edit or sign the fields.
Can it fill signature fields or attach a scanned signature?
No. Signature and button fields are listed so you know they exist, but they are not filled. A scanned image of a signature is not a digital signature either, so this page does not pretend to offer signing.
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