Useful online tools that get the job done.
Fast calculators, developer utilities and everyday text tools. Open a tool, finish the task and move on.
Popular tools
A focused first set of everyday utilities. More are added as they are useful—not just to inflate the tool count.
Percentage Calculator
Calculate percentages, increases and decreases instantly.
CalculatorsAge Calculator
Calculate age in years, months and days from any date.
CalculatorsEMI Calculator
Estimate monthly loan EMI, total interest and repayment amount.
CalculatorsGST Calculator
Add or remove GST and see the tax amount instantly.
CalculatorsWord Counter
Count words, characters, lines, sentences and reading time.
Text ToolsCharacter Counter
Count characters with and without spaces while you type.
Text ToolsJSON Formatter & Validator
Format, minify and validate JSON directly in your browser.
Developer ToolsBase64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text.
Developer ToolsUUID Generator
Generate secure UUID v4 values locally in your browser.
Developer ToolsPassword Generator
Generate strong random passwords locally without sending them anywhere.
Security ToolsCase Converter
Convert text to uppercase, lowercase, title, sentence or camel case.
Text ToolsUnix Timestamp Converter
Convert Unix timestamps and human-readable dates.
Developer ToolsURL Encoder & Decoder
Encode or decode URL components safely in your browser.
Developer ToolsBrowse by category
ToolHyv starts with lightweight utilities that can run reliably without forcing an account.
Why ToolHyv?
ToolHyv is built around a simple rule: a utility page should solve the visitor's task quickly. Core tools are designed to be lightweight, mobile-friendly and understandable without instructions longer than the task itself.
Where a tool can run entirely in the browser, ToolHyv keeps the work on the device rather than requiring an upload or account.