drag. drop. discover.
put the information you want to organize into cards (tasks, contacts, ideas, inventory).
add tags that describe each card (status, priority, category, date, owner).
drag and drop tags to filter, group, and reorganize your cards any way you want.
discover patterns, uncover insights, or communicate your plan with less work.
How does it compare?
See how multicardz stacks up against other ways to organize your work
the fastest way to see what multicardz does. drop your work in as cards, then drag tags to build columns and rows, and watch everything reorganize into a live grid. no schemas, no formulas, no setup. it's a spreadsheet pivot you operate with your hands, for anything.
start with nothing and build it up. make a few tags for status, priority, owner, whatever matters, then drop in cards and drag tags onto them. every card you tag is instantly ready to filter, group, and pivot.
a flat list hides patterns. drag a tag into the columns and another into the rows, and your cards snap into a matrix you can read at a glance. change your mind? drag the tags somewhere else and the whole grid rebuilds instantly. pivot tables without the menus.
three drop zones, three ways to cut through the noise. drop a tag in show to see only those cards, stack tags in narrow to find an exact intersection, or drop one in hide to push it out of the way. filtering becomes a gesture, not a query.
a card that belongs in two places shows up in both, at the same time. no copies, no syncing, no duplicates to keep in step. built on real set theory, so a single card can appear in every row and column it actually touches.
click any card and its full story slides open on the side, roomy and calm, with space for a title, description, and checklists. the grid card stays read-only and clean, so editing never clutters the board.
some tags belong together. drop one tag onto another to make a group, name it, and now several tags act as one. drag the group onto an axis and it organizes your whole board at a higher level.
the grid is the controls. drag a card from one cell to another and it re-tags itself to match its new row and column. no menus, no editing. move things where they belong and the data follows.
your work is scattered across tools. multicardz pulls it together: import from Gmail, Outlook, and Trello, and everything that shares a tag finally sits side by side. one surface for data that used to live in silos.
point multicardz at a trello board and every card comes across, already tagged by its list and labels. the moment it lands, you can filter, group, and pivot it like any other board. your boards, but with set theory underneath.
turn your outlook inbox into something you can actually sort. pick your folders, and multicardz reads each message, pulling out the people, companies, and topics inside and turning them into tags. now your mail pivots like a spreadsheet.
every gmail message becomes a card, automatically tagged by what's inside it. entity extraction reads the body and surfaces the names, companies, and topics as tags, so you can finally organize your inbox by meaning, not just date and sender.
the full free version includes card and tag creation, and moving cards around, saved views, and collaboration features. for just a few dollars a month you can add importing, advanced filtering, ai tag creation and more. explore all features →
try it: 1 million cards
query our live dataset and see actual performance
Full confession: one million cards is a ridiculous benchmark, the browser itself cannot really hold more than 10,000 cards at a time. I built it as a personal challenge, and I'll admit I'm proud of it. But here's what it actually means for you: the few hundred or few thousand cards you'll really use stay completely instant. Every search, every filter, every pivot lands in under a second, with a thousand times the headroom to spare. The million was never the point. The point is you'll never wait.
verify it yourself: browse the github repo to copy any guid tag from the dataset. or try searching for a tag that doesn't exist (like "test-xyz") to confirm zero results.
select a result size and click search to see live results
Everything you need to organize anything
Built for speed, designed for simplicity
Sub-millisecond Queries
Filter 1 million cards in under 3ms. No loading spinners, no waiting.
Unlimited Tags
Tag cards with as many labels as you need. No limits, no extra cost.
Drag & Drop Filtering
Drag tags to filter zones. Combine tags with AND, OR, NOT operations.
Row & Column Grouping
Group cards by any tag. Create dynamic matrices and pivot tables.
Import & Export
CSV, JSON, Trello, Jira. Bring your data in, take it out anytime.
Privacy Mode
Run entirely in your browser. Your data never leaves your device.