About Robince Studio

Who we are

Robince Studio is an independent software studio. We publish Android apps on Google Play, including DollarWise (a currency converter), Listino (shopping lists), Day to Day English (language learning), NearSend (nearby file sharing), SpaceScope, Tasbih Counter and the games Tic Tac Toe and Ludora.

Why we built the tools

We kept needing small utilities: merging a few PDFs, formatting an API response, turning a spreadsheet into JSON, shrinking a photo to fit an upload limit. Most websites that offer them ask you to upload your files to a server, show heavy ads or push you towards a subscription.

So we built our own versions that run entirely in your browser. Your files and data stay on your device, there is no sign-up and there are no watermarks.

What we care about

• Privacy first. The tools process your files locally. We do not receive them.
• Simplicity. Each tool has one purpose and a clear, uncluttered interface.
• Accuracy. We test the tools against real files, and we explain their limits honestly on each page.
• Continuous improvement. We keep maintaining the site and adding guides and tools based on feedback.

Explore

Browse the free online tools, see our Android apps, or read the developer revision notes. Questions or suggestions? Contact us.