Upload a PDF and PDF Cubby works out what it needs. If the document already has real form fields, it builds you an on-screen form to fill in directly. If it doesn't, you can still type your answers straight onto the page — a name, a date, an address — wherever they belong. You can also turn any document into a genuinely fillable form for someone else to fill in later.
How to fill pdf
Upload your PDFChoose the document you need to fill in or add fields to.
Fill it inAlready has form fields? Type your answers into the form that appears. No fields yet? Add a text box and drag it into place.
Or build a form insteadHanding this document to someone else to fill in later? Switch to "Turn this into a fillable form" and place text boxes, checkboxes, and dropdowns.
DownloadGet your filled or fillable PDF. It's gone from our side the instant your download is ready.
What you can do
- Fill out a government or HR form that already has real fillable fields
- Type your name, date, or address onto a form that has no fields at all
- Turn a scanned paper form into a real fillable PDF for others to use
- Complete an application or intake form without printing and rescanning it
- Build a simple sign-up or waiver form once, then reuse it for every new person
What happens to your file
Your files are never stored. Nothing is parked, queued, or kept — the moment your download is ready, it's gone, and no one ever sees it.
Plenty of online tools store your file on their servers and delete it later. PDF Cubby doesn't keep it at all — there's nothing left behind to clean up afterward.
Features
- Auto-detects real form fields and builds a matching on-screen form
- No fields? No problem — type anywhere on the page instead
- Create new fillable fields — text, checkboxes, dropdowns
- Choose to keep it editable or make your answers permanent
- 5 free a day — unlimited with Pro ($4.99/mo, cancel anytime)
- Never stored — files are gone the moment you're done
Tips
- Filling out a form to send back? Leave "Make my answers permanent" off in case the other side needs to re-check or edit your answers.
- Want the finished form locked so it can't be changed again? Turn that same option on before saving.
- Building a form for other people to use? Give each field a clear name — it becomes the label they see when they fill it in themselves.
- Need an actual signature rather than typed text? Use Sign PDF instead.
Frequently asked questions
- Does this work on a PDF with no form fields at all?
- Yes. If a PDF has no built-in form fields, you can still add text anywhere on the page — a name, a date, an address — and drag it exactly where it belongs.
- What's the difference between filling and creating a form?
- Filling answers a form that already exists, or types directly onto a plain PDF. Creating adds brand-new fillable fields to a document, so someone else can open it later and fill it in themselves in any PDF reader.
- Will the filled-in PDF still be editable afterward?
- That's your choice. Leave "Make my answers permanent" off and the file stays a fillable form with your answers pre-filled in. Turn it on and your answers become regular page content that can't be edited as a form again.
- Do I need an account?
- You get 5 free uses a day with no account. For unlimited use, sign in and upgrade to Pro — $4.99/month, cancel anytime. The 6 core tools (merge, split, extract, rotate, compress, convert) are always free and unlimited.
- Are my files kept anywhere?
- No. Your PDF is processed and discarded the instant your download is ready.
- What kinds of fields can I create?
- Text boxes, checkboxes, and dropdowns with your own choices.