Playground
Try it here.
Nothing leaves this tab.
Type a prompt or drop a file. Names, account numbers and IDs are swapped for realistic stand-ins, right here in your browser. You see exactly what an AI tool would receive.
Runs in your browser
Nothing is sent
The app's own detectors
A prompt
Pick a sample or write your own. The right side updates as you type.
Messages you send appear here, as the AI tool would receive them.
What the AI receives
Loading the detectors…
What stays on your computer 0
The real values and their stand-ins. The app keeps this list on your computer so you can read the AI's answer with the real names.
| Original | Stand-in | Type |
|---|
A file
Drop a Word, text, CSV or JSON file, up to 5 MB. You get a safe copy to download, made the way the app makes it.
Drop a file here
.docx .txt .md .csv .tsv .json
Safe copy
No file yet. The file is read and changed in this tab, and never uploaded.
What this playground is.
And what it is not.
- It runs entirely in your browser. Nothing you type or drop is sent anywhere, not to us and not to any AI tool.
- It uses the app's own pattern detectors. The patterns, scores and rules are exported from the app's engine, not retyped: Ghana Card, Ghana account numbers, +233 and 0xx mobiles, sort codes, SWIFT codes, customer IDs, TIN, API keys and addresses, plus the built-in checks for emails, card numbers, IBANs, IP addresses, links and dates.
- Names are found with the app's name rules. Name lists, an English word list and capitalisation rules, exported from the app's engine like the patterns. On our test set of 570 banking prompts, this page swapped 98 percent of the words in people's names, and took a word for a name in 3 of the 145 prompts that had none. The app runs the same rules alongside a language model: on the same test set it swapped every name this page swapped, and a few more.
- The app catches more of some things. It spots places it has never seen, and it checks foreign phone numbers against each country's numbering plan. Here, only listed places and Ghanaian numbers are checked.
- Same value, same stand-in. While this tab is open, a value always gets the same stand-in, in prompts and in files.
- Check it yourself. Open your browser's developer tools and the Network tab, then type or drop a file. You will only see this page's own files load. The page's security policy also tells your browser not to connect to any other site.