Fill PDF Forms Online
Detect the fields in an interactive PDF form, fill them in, optionally flatten, and download — privately, in your browser.
Your file never leaves your browser. All processing happens on your device. Nothing is uploaded to any server.
How it works
Upload your PDF form
Fill in the detected fields
Flatten if needed and download
What filling does
Detects the interactive fields in a PDF form so you can type answers and tick boxes, then optionally flatten them.
About this tool
Our free fill-PDF tool reads the interactive form fields built into a PDF — text boxes, checkboxes, dropdowns and radio buttons — and lays them out as a clean form you can complete in the browser. It's ideal for application forms, tax and government forms, onboarding paperwork and any document that was designed to be filled in digitally. When you're done you can flatten the form so your answers are locked into the page, then download a finished copy. The advantage over most free PDF form fillers is privacy and freedom: there's no signup, no limit and no watermark, and the document is processed entirely on your device so nothing is ever uploaded. If your PDF is a flat scan with no real fields, use the Sign PDF tool to write or sign directly on the page instead. Works in Chrome, Firefox, Safari and Edge with no installation.
Why use this tool
Auto-detects fields
Reads the interactive text boxes, checkboxes and dropdowns in a PDF and lays them out as a simple form.
Flatten when final
Optionally lock your answers into the page so the form can't be edited or cleared later.
Stays on your device
The form and everything you type are processed locally and never uploaded.
Common use cases
- Complete an application or onboarding form
- Fill in a government or tax form digitally
- Type answers neatly instead of by hand
- Send a locked, finished copy of a form
Frequently asked questions
Upload a PDF that contains interactive form fields. We detect each field and show it as a simple input — type your text, tick checkboxes and choose options, then download the completed file.
The PDF must contain real, interactive (AcroForm) fields. Many forms are just flat scans or images with lines drawn on them. For those, use our Sign PDF tool to type or draw directly onto the page.
Flattening bakes your answers permanently into the page so the fields can no longer be edited or cleared. It's useful when you're sending a final, locked copy. Untick it if you want the form to stay editable.
No. The PDF is read and filled entirely inside your browser, so neither the document nor anything you type is sent to a server.
Yes. There's no signup, no daily limit and nothing is stamped onto your document.