Tessalor is a Telarsa product: a collection of practical tools for calculations, conversions and everyday tasks.
Use a tool without an account. Your input stays on your device.
Work in your browser
The tools process your input locally. Files and values entered into a tool are not uploaded for processing. Once a tool has loaded, it can keep working without a connection.
You can inspect this in your browser’s network tab. Our automated browser checks test tool behaviour and requests leaving the page.
Understand the result
Tool pages explain their methods, assumptions and sources. Read those alongside the result, and check the stated limitations before relying on an estimate.
Free to use
The current public catalogue is free and has no advertising. No paid tier is offered for sale.
Built by Telarsa
Telarsa develops and maintains Tessalor. Browse the tool catalogue or learn about Telarsa’s other products.
Report a problem or suggest an improvement: hello@tessalor.com.