Features
- Full card list Every card with its art, level, colour, power, attack range, feature tags and rules text, refreshed from the live card database.
- Deep filtering Stack filters for level, colour, rarity, feature and product series, set a power or range band, or full-text search names and effects.
- Deck building with guardrails The deck list enforces the three-copies-per-name limit automatically, including cards reprinted under a different number.
- Draw-odds analysis The probability of opening with any card or group of cards, calculated with the hypergeometric distribution for your exact deck size.
- Export Copy your deck as a plain text list or download it as an image.
- Share by link Every deck encodes into its own URL. The recipient opens the exact same list, editable on their side without touching yours.
- Saved decks Log in to save your decks and open them from any device. Browsing, building and sharing by link need no account.
- Works offline-friendly on mobile The card grid and deck panel stack on narrow screens; sharing and export work the same.
Support the project
Rush Builder is a free fan project built and maintained in spare time. A Patreon helps cover the infrastructure it runs on — hosting, server and database — and fund new features. Becoming a patron is entirely optional and keeps the project going.
Become a patronFAQ
Where does the card data come from?
Card names, stats, rules text and images are pulled from the Marvel Hero Rush card database the official app uses, through a small server-side proxy so the data stays current. Rush Builder does not host or alter the cards.
Is it free? Do I need an account?
It is free. Browsing cards, building a deck and sharing it by link need no account — your working deck stays in your own browser. Log in (Discord or Google) to save decks and open them from any device.
How does deck sharing work?
The full card list is encoded into the link itself — nothing is uploaded. Whoever opens it sees your exact deck and can edit their copy without changing yours.
A card looks wrong or is missing — how do I report it?
Use the Discord to report a bug or request a feature. Card issues usually trace back to the upstream database and are fixed on the next refresh.
Can I support Rush Builder?
Yes — there is a Patreon. It is entirely optional and helps cover the infrastructure costs (hosting, server, database) and fund new features.
Is this run by Marvel or the Hero Rush team?
No. Rush Builder is an independent fan project, not affiliated with, endorsed by, or sponsored by Marvel or the publishers of Marvel Hero Rush.