Drag and Drop
[Spell Card ]
Drag a card to a zone to Summon, Set, attack, send it to the GY, banish it or return it to the Deck. Hold Shift, Alt or Ctrl to change how it is played. You can negate this card's effects in the settings.
Play DuelingBook at Spell Speed 2.
Spellspeed is a free extension that makes DuelingBook faster and easier on the eyes. Drag cards to play them, see your whole Deck at a glance, rewind any replay, and build decks with a search that finds the right card.
Add to Chrome coming soon
Get the Android app
Chrome, Edge, Brave and Opera on a computer, and Android.
Six Spells for DuelingBook
Every action they take is one of DuelingBook's own; they just resolve faster. Pick a card to read it.
Spellspeed 0.9
- Continuous Spell
- Shift Defense Position · Alt Set · Ctrl Normal Summon
- A right-click menu with every action, or DuelingBook's hover menu
- Shortcut keys you can remap
- Mill or banish several cards from the top of the Deck at once
Card Fans
[Spell Card ]
Your Deck, Extra Deck, GY and banished cards open as fans or grids. Search and sort them, or click a name in card text to list every card that matches. You can negate this card's effects in the settings.
- Continuous Spell
- Fan or Grid view, with search and sorting
- Move and resize the viewer; it stays where you put it
- Click names, archetypes and stats like "Level 4 or lower" in card text
- Action history for both players
Deck Builder
[Spell Card]
Search by type, frame, Attribute, ATK/DEF and effect. Access: list the cards that can add this card from the Deck. Summon Lab: list what your monsters can Summon. You can negate this card's effects in the settings.
- Normal Spell
- Effect filters: hand traps, searchers, negation and more
- Access: every card that can get this one out of the Deck
- Summon Lab: Fusion, Synchro, Xyz and Link recipes from the monsters you pick
- Undo with Ctrl Z, and Solo with a chosen opening hand
Replay Timeline
[Spell Card ]
During any replay: slide to any play, step back one play or one turn, or play at up to 4×. Plays you have already seen are instant. You can negate this card's effects in the settings.
- Quick-Play Spell
- Slide to any play, or click a turn mark
- One play or one turn back and forward
- 1×, 2× and 4×, with the duel's sounds
- Space or K to play and pause
Four Themes
[Spell Card ]
NightClassicAbyssEmber
The field becomes Night, Classic, Abyss or Ember. Card artwork is never tinted. You can also keep DuelingBook's own look and use only the shortcuts. You can negate this card's effects in the settings.
- Field Spell
- Night, Classic, Abyss and Ember
- The Classic look: DuelingBook's own layout, with the shortcuts kept
- Panels, menus and the deck constructor follow the theme
In Your Pocket
[Spell Card ]
Equip only to an Android phone. Buttons are sized for a finger, the replay timeline follows your thumb, and DuelingBook links open in the app. You can negate this card's effects in the settings.
- Equip Spell
- Buttons sized for a finger
- A replay timeline you slide with your thumb
- Replay links from Discord open in the app
- Android 8 or newer · Get the app
No tracking
No account, no analytics, no ads. Your settings stay in your browser. Privacy policy
Open source
Free software under the GPL-3.0 licence. Every line is public on GitHub.
Only on DuelingBook
Spellspeed runs on duelingbook.com and nowhere else, and never sees your password.
Rulings
The questions players ask first.
Does Spellspeed play for me?
No. It automates no plays and adds no card effects. Every action is one you choose, sent through DuelingBook's own duel commands, as if you had clicked DuelingBook's buttons.
Spellspeed is an unofficial extension, not affiliated with or endorsed by DuelingBook.
Is it free?
Yes, and open source. There is nothing to buy and no account to create.
Can it see my password or my decks?
It never reads your password or login cookies, and it sends nothing to us. It works with the duel and the deck on the page, in your browser. Details are in the privacy policy.
I use DuelingBook Overflow or Dueling Book Enhancer.
Turn off DuelingBook Overflow: both change the same parts of the page. Dueling Book Enhancer works alongside Spellspeed; turn off its Advanced Replay Controls, since Spellspeed brings its own replay timeline.
Firefox, Safari or iPhone?
Firefox is next, on computers and on Android. Safari and iPhone are not supported yet. Today Spellspeed runs in Chrome, Edge, Brave and Opera on a computer, and as an Android app.
I don't like a change. Can I turn it off?
Every feature has its own switch in the settings (the Spellspeed button in your browser's toolbar), and each category can be turned off at once. Turning a feature off brings back DuelingBook's own behaviour.
Something broke. Where do I report it?
In the bug reports on our Discord, or by email to contact@spellspeed.com. Say what you did, what you expected and what happened; for replays, the replay link and the play number help most.