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Sync settings

Choose what your account keeps in step on every device where you are signed in.

  • My tools

    Always synced: the tools on your board, their order and size.

  • The windows open on your start page, including what you typed in them.

  • Every note in the notepad – on the notepad page, on your board and in windows.

  • Every list of website shortcuts – on the shortcuts page, on your board and in windows.

  • Every grid in the cover grid maker – on its page, on your board and in windows.

  • Every list of bookmarked organisations in the OIN lookup – on its page, on your board and in windows.

  • Keeps your pipeline and saved recipes on all your devices. Your files are never synced – only the steps and settings.

Turning something off removes it from your account straight away. Your devices keep their own copy.

Notifications

Tools that can tell you about something new while a Synsi tab is open, even when you are in another tab or app. Choose them for this browser.

This browser cannot show notifications from websites.
Notifications are blocked for this site. Allow them in your browser’s site settings (the icon left of the address), then switch them on here.

  • Says “New message” while a Synsi tab is open – never who wrote it or what.

Your choice is stored in this browser only. Notifications never show personal content such as a message or a number. They work while a Synsi tab is open; closed tabs get none.

Browse all tools →

About Synsi

Synsi is a collection of free online tools for everyday tasks: counting words, formatting JSON, converting units, calculating VAT and much more. Each tool does one job, does it well and gives you the answer immediately.

Why we built Synsi

Many online tools are slow, cluttered with ads, ask you to sign up or quietly upload your data to a server. We think simple tasks deserve simple tools. Synsi pages load fast, work on any device and get straight to the point.

How our tools work

Most tools run entirely in your browser. The text, numbers and data you enter are processed on your own device and never sent to us. That makes them fast and safe to use with confidential information.

Tools that need a server – for example to convert files – process your file only to produce the result and delete it automatically shortly afterwards.

Accuracy you can check

Every calculator explains its formula on the page, and the browser version and our API are tested against the same set of reference cases to make sure they always return identical results. Rates such as VAT percentages show the date they were last checked and their source.

Free API

Developers can use the same tools in their own applications through our free REST API. See the API documentation for details.

Contact

Found a bug, have an idea for a new tool or a question about our API? We’d love to hear from you.