Collection Catalog
A private collection catalog in one HTML file on your machine: no account, no cloud, no server to talk to.
This is not a screenshot. It's the real tool, running right here: go on, put something in it.
Forged into a knife, this tool ages with use: the blades you reach for wear soft, entries you tend keep their bloom, and the years travel with the file through every reforge.
Whatever you collect — stamps, fountain pens, cast-iron pans, improbable teapots — there comes a day when you need to know what you actually have and what it is worth. The Collection Catalog is that reckoning made pleasant: each item, its category, condition from Mint to Poor, its value, and notes. Insurers, heirs, and your own curiosity will all be glad of it.
What it keeps
- Itemshort text
- Categoryshort text
- Conditionchoice · Mint / Very good / Good / Fair / Poor
- Valuenumber
- Notesnotes
Standing facts
- One HTML file. Opens in any modern browser, on any operating system.
- No account. No login, no sign-up, no e-mail wall.
- No cloud. Nothing leaves your browser: no server, no telemetry, no analytics.
- Yours forever. The file keeps working whether or not Offline.Ltd does.
- Ages with use. Entries you tend keep their bloom; the years travel with the file through every reforge.
In ten years
Whatever you put in (Item, Category, Condition and Value) stays inside the file itself. There is no account to lapse, no plan to be sunset, no migration e-mail with a deadline in it. A decade of collection catalog entries is a decade of your own handwriting, kept in a document you can back up like any other.
If Offline.Ltd closes tomorrow, nothing on your machine notices. That isn't a marketing promise; it's simply what a file is.
Getting your data out
Export to CSV from inside the tool and open it in anything: a spreadsheet, another app, a text editor. Or keep the HTML file: it is plain, readable, and inspectable; you can open it in a text editor and see your own rows sitting there. No export queue, no "we'll e-mail you a link within 48 hours", no format that only one vendor can read.
Copy the file to a USB stick, a NAS, a folder your devices already sync. It runs on Windows, macOS, Linux, Android and iOS, online or off, because a browser is the only thing it ever needed.
Who else sees this
Nobody. Your Item, Category, Condition and Value never leave the file on your own disk. There is no account, no telemetry, no analytics, and no code in the file that opens a network connection, pull the cable and watch it carry on working. How privacy works across the Hobby tools →
Questions people ask
How do I catalog a collection for insurance purposes?
List each item with its condition and your best value estimate, and use the notes for provenance — where you got it, what you paid, any documentation. An itemised list is exactly what an insurer asks for after the worst has happened.
Can one catalog hold different kinds of collections?
Yes — the category field keeps the stamps away from the teapots while everything lives in a single list. One file, the whole hoard.
Who can see what my collection is worth?
Only you. The catalog runs offline in your browser with no account and no server; the values you record never leave the page. It is one HTML file you own — appropriately enough, part of the collection.
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Fits your knife at weight 1. Nothing here is final, Knife follows Life. Reforging within your tier is free, forever. Add it, drop it, reforge it later; the file stays yours either way.