What does "Flatten" do?

Flattening merges the filled values into the page content as static text, then removes the form fields from the document. The result looks identical but the values cannot be changed. This is useful for submitting a final version — the recipient cannot alter your answers. Without flatten, the fields remain interactive.

My PDF is password-protected — can I fill it?

Remove the password first using the Unlock PDF tool, then fill the unlocked copy here.

PDF

Fill PDF Form

Q: What if my PDF has no form fields?

The tool detects this immediately and tells you clearly. You can then open the PDF in Edit PDF to add text manually by placing text boxes on any position on the page.

Q: Is the PDF uploaded to a server?

No. The entire process — rendering, form detection, field filling, and PDF assembly — runs inside your browser. Your file never leaves your device. Open the browser Network tab and you will see no upload request.

Fill any PDF form in your browser — text fields, checkboxes, dropdowns — nothing uploaded.

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Fillable PDFs embed interactive form fields directly in the document — text boxes, checkboxes, radio buttons, and dropdown menus. Most PDF viewers can fill these fields, but not everyone has Acrobat installed, and online tools often require you to upload your form to a server. This tool reads the PDF entirely in your browser, overlays the fields as interactive HTML inputs so you can fill them in, then writes your values back into the real form fields when you download. No upload, no account, no server.

After filling, choose whether to flatten: keeping fields interactive means the recipient can still edit values; flattening bakes the values in permanently as static page content. Both options produce a valid, standard PDF.

How to Fill a PDF Form

1
Drop in your PDF
Drag the form PDF onto the upload area or click to browse. The tool renders each page and highlights all detected fields in blue.
2
Click to fill
Click a text field to type, click a checkbox to tick it, pick an option from a dropdown — all directly on the page. Scroll or navigate to reach fields on other pages.
3
Choose flatten (optional)
Toggle "Flatten" on to bake values in permanently. Leave it off to keep fields editable in the output.
4
Download the completed form
Click "Download filled PDF." The file is assembled locally and downloaded immediately.
5
Sign or edit if needed
Use Sign PDF to add your signature, or Edit PDF to add annotations on top of the filled form.

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Frequently Asked Questions

What is a fillable PDF?

A fillable PDF contains AcroForm fields — invisible interactive elements (text boxes, checkboxes, radio buttons, dropdowns) embedded in the document. When opened in a PDF viewer, these fields are clickable. This tool reads those fields and renders them as interactive inputs so you can fill them without Acrobat or uploading.

Will my values be saved into the actual PDF fields?

Yes. The download uses pdf-lib to write your values back into the real AcroForm fields — not as an image overlay. The output is a properly filled AcroForm PDF that works in any standard PDF viewer including Acrobat, Preview, and Chrome.

What does the Flatten toggle do?

Flattening merges filled values into the page content as static text and removes the form fields. The output looks identical but values cannot be changed. Useful for final submissions. Without flattening, fields stay interactive — recipients can still edit values.

What if my PDF has no form fields?

The tool detects this and tells you immediately. You can then switch to Edit PDF to add text manually by clicking anywhere on the page.

Is the PDF uploaded to a server?

No. Everything — rendering, field detection, filling, and PDF assembly — runs inside your browser on your device. Open your Network tab while using the tool and you will see no upload.

My PDF is password-protected — what do I do?

Remove the password first with Unlock PDF, then fill the unlocked copy here.