Pay once. Fill forever.
No subscription. Credits never expire. Buy a pack when you need it, use it over a year — or three.
No recurring charges
Credits never expire
5 free fills every month
5
free fills / month
Free tier — no card required
Auto-resets the 1st of every month (UTC). Web forms or PDFs — your choice. If you outgrow it, buy a pack. If you don’t, it’s yours forever, free.
Credit packs
Three sizes. One price each. No tiers, no upgrades, no expirations.
Free vs paid, line by line
Any paid pack unlocks profiles and custom fields forever. The advanced PDF tweak features depend on which credit you spend on each fill — your choice every time.
Account-level — unlocked forever after any purchase
| Free account | Paid account | |
|---|---|---|
| Web form autofill | ||
| PDF form autofill | ||
| Local pattern matching | ||
| AI fallback on tricky fields | ||
| Profiles | 1 | 5 |
| Custom fields | 3 | 15 |
Per-fill — depends on which credit you spend on this PDF
| Spending a free fill | Spending a paid credit | |
|---|---|---|
| Re-download tweaked PDF | ||
| PDF tweak actions per fill | 3 | Unlimited |
| Click-to-place signature | 1, fixed size | Unlimited, draggable + resizable |
| Font family + size controls |
You pick free or paid before each PDF fills — and you can keep spending free fills even after you’ve bought credits.
How credits work
Pricing questions
Why credits instead of a subscription?
You shouldn't pay every month for a tool you use twice a quarter. Buy a pack when you need it, use it whenever — credits never expire and you keep what you don't spend.
Free vs paid on a PDF — who decides?
You do, on every PDF. Before mapping runs, FillDef shows a Choose-credit screen with your free-fill quota (N of 5) and your paid balance side by side. Pick free if a quick fill is enough; pick paid if you want unlimited tweaks, font controls, and a draggable signature on this specific PDF. Paid-tier accounts can still spend free fills — buying credits doesn't force you to use them.
Is the first-time pack really cheaper?
Yes. New accounts can buy 100 credits for $1.99 once — the same credits as Starter, just $1 cheaper because you're new. After that, regular pack pricing applies.
Do free fills carry over?
No. Free fills reset on the 1st of each month (UTC). They don't roll over because they're a usage allowance, not a balance. Paid credits are different — those never expire.
Which PDFs can FillDef fill?
Fillable PDFs only — files with real input fields built in (W-9s, most government forms, insurance and HR docs). Scanned-image PDFs aren't supported. FillDef detects the file type on upload and tells you before any credit is spent, so you'll never burn a fill on the wrong file.
What counts as a fill?
One web-form fill or one PDF mapping pass. Re-downloading a tweaked PDF, editing fields, or moving the signature in the review surface does NOT spend a credit — those are free as many times as you want.
Do I lose credits if I uninstall the extension?
No. Credits are tied to your account, not your browser. Sign in again from any device and your balance is there. (Your encrypted profile is per-device, but credits aren't.)
Try it before you spend a dollar.
Five fills a month is enough for most people. If it isn’t, the cheapest pack is two coffees — and you’ll keep what you don’t spend.