Dev & Tech

What are dev & tech tools?

Dev & tech tools are free online utilities that automate small, fiddly tasks in coding and design, such as converting color and CSS unit formats, formatting JSON, encoding text or URLs, generating unique identifiers, and converting number bases. Developers, designers, students, and hobbyists use them to skip manual lookups and avoid copy-paste mistakes.

Dev & Tech tools on Toolzent

Pick the tool that matches the job you are doing right now.

Tool	What it does
Hex to RGB Converter	Converts a hex color code to RGB and HSL values with a live swatch, and works in reverse too.
Base64 Encode and Decode	Encodes text to Base64 or decodes Base64 back to text, UTF-8 safe, in one click.
UUID Generator	Generates random version 4 UUIDs in bulk, with an optional uppercase format and copy-all button.
Aspect Ratio Calculator	Solves a missing width or height to keep an image or video at the same aspect ratio.
Binary Translator	Translates plain text into 8-bit binary and converts space-separated binary back to readable text.
JSON Formatter	Pretty-prints, indents, and validates JSON, flagging syntax errors so payloads stay readable.
URL Encoder / Decoder	Percent-encodes text for safe use in query strings and decodes encoded URLs back to plain text.
Color Contrast Checker	Calculates the contrast ratio between two colors and checks it against WCAG AA and AAA levels.
Number Base Converter	Converts a number between binary, octal, decimal, and hexadecimal in one step.
Morse Code Translator	Converts text to Morse code dots and dashes, and decodes Morse back into readable letters.
CSS Unit Converter	Converts between px, rem, em, and percent based on a chosen root font size.

Common dev & tech formats and examples

These reference values show what each tool produces, so you know what to expect.

Task	Example input	Example output
Hex to RGB	#8b5cf6	rgb(139, 92, 246)
Base64 encode	Man	TWFu
Binary encode	Hi	01001000 01101001
URL encode	a b&c	a%20b%26c
Decimal to hex	255	ff
px to rem at 16px root	24px	1.5rem

A three-digit hex like #abc expands to #aabbcc before conversion. Base64 and binary are reversible, so decoding TWFu returns Man. URL encoding swaps unsafe characters for percent codes, so a space becomes %20, and CSS unit math is anchored to a root font size, so at a 16px root, 24px equals 1.5rem.

How do I choose the right tool?

Match the tool to what you are working on:

• Picking a UI color? Use the Hex to RGB Converter to move between hex, RGB, and HSL, then confirm legibility with the Color Contrast Checker.
• Moving text through a JSON field, header, or email body? Reach for Base64 Encode and Decode, and use the URL Encoder / Decoder for query strings.
• Debugging an API response? The JSON Formatter pretty-prints and validates the payload so errors stand out.
• Need unique keys for a database or test data? Generate them with the UUID Generator.
• Working with bits and bases? The Binary Translator maps characters to bits, and the Number Base Converter switches between binary, octal, decimal, and hex.
• Sizing layouts or media? Use the CSS Unit Converter for px, rem, and em, and the Aspect Ratio Calculator to scale images and video without distortion.
• Encoding a message for fun? The Morse Code Translator converts text to dots and dashes and back.

If you are unsure, start from your input format: a color code points to the hex converter, a string of zeros and ones to the binary translator, and a width needing a matching height to the aspect ratio tool.

Why use Toolzent’s dev & tech tools?

Toolzent’s dev & tech tools are 100% free with no sign-up and nothing to install. They run privately in your browser, so the text, colors, JSON, and IDs you work with stay on your device and are never uploaded. Results appear instantly, and each tool follows the same standards used everywhere else, so a hex code, a Base64 string, or a UUID produced here behaves exactly like one from your code editor.

For related work, explore our Unit Converters, Math & Algebra, and Text & Writing category hubs.