Online tools
Quick utilities for web, code, colors, electronics and TTS
This collection brings together six focused tools for everyday technical tasks: checking a public URL, creating a new password, cleaning up JSON, converting color values, estimating a resistor for an LED and turning text into a robotic voice.
Each utility has one clear purpose and a straightforward interface, so you can get a result quickly without installing software or working through a complicated dashboard.
Choose a tool
Open the utility that matches the job. The short descriptions below explain what each tool accepts and when it is most useful.
Check if a Website Is Online
Enter a public web address to check whether it can be reached and whether the server returns a usable response. It is handy for testing a page, domain or shared link before publishing it.
Password generator
Start from a keyword and receive a more complex password that can be copied directly. Use a fresh, non-sensitive keyword and never enter a password that already protects one of your accounts.
JSON formatter
Paste JSON data to validate its syntax, format it with readable indentation, minify the output or sort object keys. Useful when an API response or configuration file is difficult to inspect.
HEX, RGB and HSL Color Converter
Pick a color or enter a value and convert it between HEX, RGB and HSL formats. This is useful for CSS, design systems and quick comparisons between different color notations.
LED resistor calculator
Choose the LED color and supply voltage to estimate a suitable series resistor. It is a quick starting point for breadboard prototypes; always check the LED specifications and component tolerances before wiring the circuit.
Robotic voice TTS
Turn text into a robotic voice: choose the language, male or female voice and speed, preview the audio and download a temporary MP3.