Tools that run inside your browser tab.

Whatever you put in stays exactly where it is. The work happens on your own machine, in the tab you already have open. Nothing you open is ever uploaded. There is no server to upload it to. No account, no queue, no upload bar.

• Brick mosaic makerCreativeTurn any photo into a brick mosaic you can actually build, matched only to colours still in production. Runs in your browser; nothing is uploaded.

Why an otter, and why in the browser

The otter is for the name: tab plus otter, a small creature that lives in your browser tab and does the fiddly jobs. Otters are also one of the few animals that use tools without being asked to, which felt about right.

The browser part is the serious half. Almost every converter you find asks you to upload the file first, which means handing a stranger your passport scan, your bank statement or your photographs, and then trusting a paragraph of legal text about what happens to them next.

None of that is necessary any more. Browsers have been able to decode images, read PDFs, crunch spreadsheets and generate proper cryptographic randomness on their own for years, and these tools simply use that. Nothing you open leaves the tab, and the work happens on your own hardware.

Which is the bit worth holding on to: that is not a promise about my conduct, and you have no particular reason to take one of those on trust. It is a property of how the tools are built, and you can watch it happen in your browser's network tab.