78 free tools · no account needed
Free online tools for numbers, code and text
Calculate, convert and format. Pick a tool below or search straight away.
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Code
20 tools All code toolsFormat and minify
Encoding and escaping
Testing
Math
58 tools All math toolsEveryday calculators
Complex numbers
Matrices
Trigonometry and geometry
- Angle calculator
- Arc length calculator
- Arccos calculator
- Arcsin calculator
- Arctan calculator
- Cartesian to polar
- Circle sector calculator
- Cosine calculator
- Hyperbolic cosine (cosh)
- Hyperbolic sine (sinh)
- Hyperbolic tangent (tanh)
- Polar to Cartesian
- Right triangle calculator
- Tangent calculator
- Trigonometry calculator
Calculus and analysis
More tools in Dutch: 256 tools →
About online-tool.ing
online-tool.ing collects small, fast tools for everyday work: working out a percentage or VAT, rounding numbers, formatting JSON or decoding a JWT. Every tool has its own page and needs no account. The tools run entirely in your browser, so your data stays on your own device.
Frequently asked questions
Are the tools free?
Yes. All tools are free to use, with no account, sign-up or usage limit.
Are my files stored?
No. The tools run in your browser: numbers, text and files are processed on your own device and are not sent to a server or stored.
Does it work on my phone?
Yes. Every page works in modern browsers on phones, tablets and computers. For large files a computer is faster.