Fill PDF Forms — Free, No Upload, No Sign Up
Fill PDF forms in your browser. Your data never leaves your device.
Drop a PDF here or click to upload
Files stay on your device. Max 50 MB.
Fillable or flat? Two kinds of PDF forms
A PDF can hold a form in two completely different ways, and most free tools handle only the first one:
- Fillable forms (AcroForm) — the file contains named fields. Clicking a field lets you type, tick a box or pick from a list, and a viewer can save those values back into the document.
- Flat forms — a scan, a print-out, or an export from an old system where the lines and boxes are just ink on the page. There are no fields to click, so a filler that only knows about AcroForm quietly does nothing.
What PlainFile does with each
| Form type | How you fill it |
|---|---|
| Fillable PDF | Text, checkbox, radio, dropdown and list fields are detected automatically. Type directly on the page or work down the field list in the sidebar — both stay in sync. |
| Flat PDF | Place a text box anywhere on the page, and drag a signature where it belongs. You position it; nothing pretends to detect fields that are not there. |
Either way the output is flattened, and that is deliberate: a flattened form renders identically in every viewer and cannot be quietly altered after you send it.
Saving also clears the document's own metadata — author, producer, keywords, creation and modification dates, and the XMP block. Templates downloaded from an agency site often carry editing history you never asked for; the file you send does not.
Working with a standard government form? The forms hub has the current official templates — W-9, I-9, DS-11, DS-82, W-4 and the Schengen visa application — each with a line-by-line explanation of what goes where.
Why filling a tax or HR form in the browser matters
A W-9 carries a legal name, an address and a tax identification number. An I-9 adds passport or licence details. Uploading documents like these to a free online filler means trusting a stranger's retention policy — and "we delete your files after an hour" is a promise you cannot check.
Here the file is opened by WebAssembly inside a Web Worker on your own device. There is no backend that could keep a copy, no account that ties the form to an email address, and the tool keeps working with the network disconnected. You can confirm it the same way you confirm everything else on this site: watch the Network tab while you fill.
Honest limitations
- Dynamic XFA forms — some agencies ship forms built on the older XFA format. The dynamic layer is removed so the document can be filled and flattened; what you get back is a static PDF with your answers in place.
- No OCR — a scan is not converted into fields automatically. You place text boxes yourself, exactly where you drop them.
- Password-protected PDFs — remove the password first; an encrypted file cannot be filled or saved.
- Practical limits — tested up to about 50 MB and roughly 200 pages. Bigger files may work, but are not guaranteed.
Frequently asked questions
Is it really free, and is there a sign-up?▼
No account, no email, no watermark and no daily quota. Files up to 50 MB and roughly 200 pages are supported; that limit is stated up front rather than discovered halfway through.
Can it fill a scanned or non-fillable PDF?▼
Yes. When a PDF has no form fields — a scan, a print-out, an export from an old system — you place text boxes and a signature anywhere on the page. What it does not do is recognise fields automatically: there is no OCR here, so you position the text yourself.
What happens to the fields when I save?▼
The result is flattened: typed values become part of the page content. That means the completed form looks the same in every viewer, on every device, and cannot be casually edited afterwards.
Are my filled forms uploaded anywhere?▼
No. The PDF is parsed by WebAssembly inside a Web Worker on your device. There is no file-processing backend, which is the point: a filled W-9 contains a name, an address and a tax identification number.
Can I sign the form too?▼
Yes. Draw a signature with a mouse or a finger, or type it, then drag it into place and resize it. It is flattened into the file along with the rest of the content.
Does it work on a phone?▼
It runs in a mobile browser and the layout adapts, though filling a long government form is faster on a desktop. Nothing needs to be installed either way.
Before you share your filled form
Need to hide sensitive data before sharing?
Redact your PDF first — permanently remove text, images and metadata right in your browser.
A completed form often travels further than intended: a landlord, a recruiter, a client forwards it. If some of the fields should not travel with it, redact them properly — deleting the content rather than covering it up.