Accounts & gas
HILIA runs on a simple model: sign in for everything, pay only for watermark creation.
Your TYO ID
All operations that touch the HILIA service require a signed-in TYO ID — one free account across TYO products. Sign in from the top-right of any page.
What's free, what spends gas
| Operation | Cost |
|---|---|
| Hide, Reveal, Probe, Capacity (steghide) | Free |
| Watermark Extract, Detect, Reveal preview | Free |
| Visible watermark (client-side) | Free, no sign-in needed |
| Watermark Embed | 1 gas per image |
| Watermark Stamp | 1 gas per image |
Gas is only spent when the operation succeeds — a failed request costs nothing.
Checking your balance
The header of the tool shows your balance (⛽) — or ★ if you're a member. Click it to open the top-up page.
Topping up
Buy gas at the top-up page. Checkout is handled by the TYO store; your balance updates as soon as payment completes.
Membership
Members watermark without spending gas — embed and stamp as much as you like while the membership is active. The tool shows ★ Member in place of a balance. If a membership lapses, your remaining gas balance takes over.
Out of gas mid-batch? Embed and Stamp return an "out of gas" error and leave the image untouched — top up and re-run the operation. Everything free keeps working regardless of balance.