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Paste your Magic list and get a PDF ready to print, cut out and play.
Proxy Builder is a desktop app for building Magic: The Gathering proxy decks. It looks up each card on Scryfall, downloads the best image, places it on sheets at real size and generates a PDF with bleed, cut guides and well-aligned double faces. All the work is done on your computer, fast, with no accounts and no ads.
For Linux, Windows and macOS, in Spanish and in English.
- Paste the list however you have it:
4 Lightning Bolt,1 Sol Ring (CMM) 410… The Moxfield, Arena or MTGO formats work, and so does a list copied as text from Archidekt (with itsSIDEBOARDor#SIDEBOARDheader). You can also import an Archidekt deck by its URL, with or without the sideboard. - Press «Cargar lista» (Load list). The app looks up each card, picks the printing, downloads the images and, if you want, automatically adds the tokens the deck creates.
- Check the sheets. What you see is what gets printed: the preview and the PDF come from the same calculation, down to the millimetre.
- Export the PDF. Print at 100 %, cut and play.
Change the printing. Every card has all its editions one click away, in any language, with the option to show only the high-resolution ones. You can change a single copy or all of them at once.
Search and add cards by name (with autocomplete) or with Scryfall syntax:
t:dragon c:r r:m finds the red mythic dragons. Double-click and it goes into
the deck.
Browse entire sets, with all their cards, and load the ones you choose (or the whole set) to replace the list or add them to the end.
And also:
- Card language. Choose which language you want the printings in; if a card doesn't exist in that language, it stays in English and tells you. «Reaplicar idioma» (Reapply language) changes all the cards that aren't pinned at once.
- Automatic tokens. The tokens, emblems and copies your cards create are added to the end automatically. «Detectar fichas» (Detect tokens) looks for the ones an existing deck is missing, also for linked custom cards.
- Beyond Scryfall. Tokens Scryfall doesn't have (such as Kelp or some Oozes) come from the Cockatrice token catalogue, in the list, in «Añadir carta» (Add card) and when linking. Cards written by their name in another language that Scryfall doesn't have printed that way are found too; in Settings you can download an index of names in every language to do it without asking online.
- Honest warnings: card not found, low-resolution image, card Scryfall doesn't have scanned yet… Each slot marks it.
- Upload custom cards (alters, cards you made, scans) or drag them onto the preview: over a card they replace it, outside they are added.
- Back to your taste: one for the whole deck or a different one per card.
A custom image is just an image: the app doesn't know which card it is. When you link it to its Scryfall card, the image doesn't change, but the card starts counting in the statistics, the prices and the legality, and the card info shows its real name and edition.
Here, a freshly uploaded deck of Spanish proxies. Each card is named like its file and nothing more:
To recognise them, the app reads each image with OCR: the title, the type line and the bottom text, where many proxies carry the original name. It searches what it reads in the Scryfall catalogue, in any language, and proposes the card with a confidence level: exact, probable or no proposal. The original name is found wherever it is (next to the artist, in a corner, in the rules box), and the set, number and language printed at the bottom are read too, so the image's language is noted. The reading is done on your computer.
You can link in three ways:
One card. Right click → «Vincular con una carta…» (Link to a card…). The search starts with the file name and «Detectar con OCR» (Detect with OCR) reads the card. Here it gets the exact edition right.
The selected ones. Select several with Ctrl or Shift and, with the right click, «Vincular las seleccionadas…» (Link selected…). The dialog lets you choose between the selection and the whole deck, and between reading only the missing ones or all of them again.
The whole deck. The «Vincular con una carta» (Link to a card) button in the left panel reads all the deck's custom images in one go, with a progress bar and time remaining, and you can stop halfway to review what was read. Each proposal can be changed in its dropdown or unticked before pressing «Vincular» (Link). In this deck it also recognises a proxy with invented art (Rimuru) by its original name at the bottom: Jodah, Archmage Eternal.
The result: the same images, now with their real card behind them.
- Drag cards to reorder them, or use «Mover antes / después / a la posición…» (Move before / after / to position…). Select several with Ctrl or Shift and act on all of them.
- Pin a card to its slot so nothing moves it.
- Mark a card as a design variant (another version of a card that's already in, to pick one later), optional or sideboard. Marked cards are printed but don't count for the deck size, the copy limit or the statistics, so a Commander deck with variants still adds up to 100. Cards in the list's Sideboard section come already marked.
- Auto sort groups the copies, removes the gaps and respects the pinned cards.
- Card info shows the name and edition of each slot; Ver reversos (Show backs) shows the other side of the sheet.
- Undo and redo with Ctrl+Z and Ctrl+Shift+Z (the last hundred changes).
- Zoom with Ctrl + wheel, and the sheets that are out of view don't use up memory: decks of hundreds of cards move smoothly.
Rotation, zoom, framing and eleven image adjustments: brightness, exposure, contrast, saturation, warmth, intensity, sharpness, clarity, noise reduction, vignette and fade. The view updates instantly and what you see is the same render that will go into the PDF.
When you're done, decide where the change goes:
- Apply: only to this card.
- Apply also to its copies: to all the ones that use the same image, with rotation, framing and adjustments. Perfect for the four copies of a card or for all the basic lands with the same art.
- Apply to all cards: the colour adjustments to the whole deck (rotation and framing stay on the card).
- Quality at 300, 600 or 900 DPI, in JPEG (with adjustable quality) or PNG.
- Paper: A3, A4, A5, Letter, Legal, Tabloid and photo paper (4×6″, 5×7″, 8×10″, 8×12″), portrait or landscape.
- Standard Magic card size (63 × 88 mm) or poker size (63.5 × 88.9 mm), with minimal margin and spacing between cards.
- Bleed so there is no white edge when cutting, repeating the border or mirrored, also on the backs.
- Cut guides with the colour, thickness and length you want.
- Darken edges: light borders from old scans (by contrast, solid black or threshold), without touching white-border cards or full-art cards.
- Double-sided: one side or duplex (backs always come out upright,
mirrored left to right, never rotated).
- The duplex calibration sheet and «Alinear filas» (Align rows) correct your printer's offset row by row, measuring with a ruler.
- Split the PDF every N sheets.
- If the file is going to be huge, the app warns you first and suggests lowering the quality.
- Presets: save all your print settings under a name («Brother HL-L2350») and use them in any deck.
- Exporting shows a progress bar and can be cancelled at any moment.
- The ⋮ next to «Exportar PDF» copies the deck list for Moxfield, Arena, MTGO
or as plain text, downloads it for MTGO, or saves the deck with its images
(
.pbdeck).
Double-faced cards are printed with their real back, duplex or, if your printer is single-sided, as interleaved pairs: both faces in consecutive slots, ready to go in the same sleeve. Large cards (planes, schemes, Vanguard) go on their own sheets at the end, at their size.
A full panel with data and prices from Scryfall:
- Summary: cards, recommended lands, average cost, estimated price and the probability of a good opening hand.
- Mana curve by type, colours, colour identity and the tokens the deck uses.
- Functions: ramp, card draw, removal, sweepers, counterspells, tutors, tokens… deduced from each card's rules text, with a button to select them in the deck.
- Probabilities: draw calculator (hypergeometric), lands in the opening hand and the probability of reaching each land drop, going first or second.
- Prices in euros (Cardmarket) or dollars (TCGplayer) for the chosen printing, by type and from most to least expensive.
- Legality by format and estimated Commander bracket. The format is detected automatically or chosen by hand.
All your decks in one place, with their cover. They save automatically while
you work. You can duplicate them, rename them and export them as .pbdeck with
all their images inside to pass them to another computer or a friend. «Liberar
espacio» (Free up space) deletes the images that no deck uses any more.
- Your own tags, with a name and a colour: Commander, To print, Friday night… Put them on one deck or on several at once, and filter by one or by several (decks with any of them, or with all of them).
- Favourites at the top, notes for each deck and the cover you pick from its cards.
- Search by deck name, by the cards it has, by its notes or by its tags. Filters by colour identity (includes, exactly or at most), by class (Commander, constructed, limited), by the formats it's legal in, by the language of its cards, and by whether it has designed cards or custom images. If a deck is really in another language but its cards are linked to English printings, set its language by hand from its menu; for a custom image you can also say which language it is in.
- Sort by modified, opened or created date, name, cards, price, average cost or colours, and group by tag, colours, class or language. Grouped by tag, a deck with several tags shows up under each one.
- Two views: the grid, in three sizes, and the list, with the technical details of each deck: colours, class and bracket, cards and tokens, average cost, estimated price, language, custom images and dates.
- Select several decks (Ctrl + click, Shift + click, Ctrl + A) to tag them, mark them as favourites or delete them together.
The interface in 15 languages: English, Spanish, French, German, Italian, Brazilian Portuguese, Romanian, Polish, Dutch, Russian, Ukrainian, Japanese, Korean and Simplified and Traditional Chinese, picked from a list with each one's flag. The translations were written with care but without native review: corrections are welcome as GitHub issues. Light or dark theme, more than forty colour themes, three surface styles (flat, embossed and glass), materials, effects and interface size. «Más temas…» (More themes…) installs any theme from the tweakcn community by its link, with its fonts.
The Design tab and the «Diseñar proxy» (Design proxy) option in each card's menu let you create your own version of a card, with a new frame and translated text:
- Text in any of the 15 languages taken from the real card's printing in that language (name, type line and rules), chosen per deck; English is always one click away. Romanian, Polish, Dutch and Ukrainian have no printed cards: their rules stay in English and the type line is translated. Japanese, Korean and Chinese fonts are downloaded the first time you pick one of those languages. For cards with no printing in the chosen language there is a suggested translation based on official phrases.
- Art from Scryfall, uploaded, pasted or cropped from another card, with zoom, framing and rotation.
- Frames and styles from a frame pack, with colour, legendary crown and rules box automatic or manual. Besides the house pack there are the original image frames (the Card Conjurer M15s, normal and borderless), which are downloaded the first time they are chosen. The rules box can adapt its height to the text (tokens with little text look less cluttered) or stay fixed, on any frame.
- Free fonts to download from the app: classical, medieval or fantasy style for the title (Cinzel, Almendra, Uncial Antiqua, Grenze Gotisch…) and very legible ones for the rules text, plus a pixel font (Pixelify Sans). In addition, the collection decides how much the title and the type line are condensed, always and at most.
- Downloadable frame packs. The first one is Balatro: pixel-art frames in seven styles (Joker, Planeswalker, Spectral, Tarot, Planet, Voucher and Land), with their mana chips, rarity labels and coloured keywords, plus ready-made backs, tokens and lands to add to the deck.
- Collections with their set symbol and numbering, so the whole deck looks like it's from the same edition.
- Almost all of Magic's layouts: planeswalkers, sagas, classes, cases, levels, adventures, split cards, flip, double-faced, battles, meld, dungeons and large cards.
- Design the whole deck at once (a draft per card, to be reviewed afterwards)
and export PNG images at 300, 600 or 900 DPI, into
es/anden/folders.
Designed cards are printed to the PDF from their design, at the export resolution.
- Native application built with Tauri and Rust: everything heavy (searches, downloads, images, PDF, statistics) runs in Rust and uses all the cores.
- Local and private. Your decks and images stay on your computer. The only connection is to Scryfall, for cards, images and prices, and what has already been downloaded is cached.
- Exact to the millimetre. The preview and the PDF use the same geometry, so what you see on screen is what comes out of the printer.
The installers for each version are on the Releases page of the repository. They are not signed: Windows (SmartScreen) will warn about an «unknown publisher» (More info → Run anyway) and macOS (Gatekeeper) will ask you to open the app with right click → Open the first time.
From then on the app updates itself: when it opens (and every few hours) it
checks for a new version, downloads it quietly and offers to restart. It can be
turned off, or checked by hand, in Settings → Updates. Each update is signed and
the app verifies it before installing; on Linux, the .deb and .rpm ask for
your password to install it. Versions before 2.4.0 don't have this yet: install
2.4.0 by hand once.
The data lives in the app's data folder (com.estigio.proxybuilder): the library
(library.db), the deck images (blobs/) and the log (logs/proxy-builder.log).
The thumbnail cache can be cleared from the app without losing anything.
Tauri 2 + Rust + React/TypeScript.
- Node 22 and pnpm 12 or later.
- Stable Rust (1.92 or later).
- On Linux, the Tauri libraries:
sudo apt install libwebkit2gtk-4.1-dev build-essential curl wget file libxdo-dev libssl-dev libayatana-appindicator3-dev librsvg2-dev
pnpm install
pnpm tauri devThe first Rust build takes several minutes.
pnpm check # TypeScript, tests, Biome, texts and Knip
pnpm check:clippy # Rust warnings (blocking)
pnpm test:rust # Rust testspnpm tauri build produces the installers for the platform it runs on. The
workflow .github/workflows/release.yml produces the ones for Linux, Windows and
macOS (Intel and Apple Silicon) in a release draft. To ship a version:
pnpm release patch (or minor, major, X.Y.Z; with --dry it only checks).
It bumps the version in four places, commits and pushes it, waits for the CI,
starts the workflow by hand (Actions tab → release) and, when it finishes, asks
whether to publish the draft. Publishing creates the tag. It needs gh with an
active session.
The installers are signed for the in-app updater (not for SmartScreen or
Gatekeeper) with the key in the TAURI_SIGNING_PRIVATE_KEY repository secret;
its public half is in tauri.conf.json. The draft gets a latest.json with an
entry per installer, and the installed apps see it once the draft is published.
If the private key is lost, the installed versions won't accept any new update.
The card data and images come from Scryfall. The editor's original frames come from Card Conjurer: the app downloads them when they are used and does not distribute them. The Balatro pack's templates are by the author of the «Balatro Balatrez» deck, who shares them publicly; its font is m6x11plus by Daniel Linssen. Balatro is a game by LocalThunk. Token data not in Scryfall comes from Cockatrice, names in other languages from MTGJSON and magicthegathering.io, the extra colour themes from tweakcn, the emoji and flags from Noto Color Emoji (OFL 1.1 and Apache 2.0; flags in the public domain) and the Japanese, Korean and Chinese fonts from Noto Sans CJK on Google Fonts (OFL 1.1). Magic: The Gathering is a trademark of Wizards of the Coast. This application is not affiliated with or endorsed by either.