Calcbin
184 free online tools — calculators, converters & generators
Free
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About
Calcbin developer-tools 184 free online tools — calculators, converters & generators Every site that comes up in search for free developer tool is buried in ads and cookie banners. CalcBin is the tool I wanted to exist. 184 tools, all free, all client-side
Problem & solution
Problem
Every site that comes up in search for free developer tool is buried in ads and cookie banners.
Solution
CalcBin is the tool I wanted to exist. 184 tools, all free, all client-side
Comments
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- harpoonshining5104Mar 1, 2026
I built CalcBin after hitting the same wall every developer hits: you need to quickly convert a unit, check a JSON payload — and every site that comes up in search is buried in ads. CalcBin is the tool I wanted to exist. Happy to answer any questions. What tools should I build next?