Free Developer Tools

Fast, private, open-source tools that run entirely in your browser. No uploads, no tracking, no accounts.

FI

Favicon Generator

Generate favicons from text, emoji, or images. Download as ICO, PNG, SVG with all required sizes.

{}

JSON Formatter

Format, validate, and minify JSON. Syntax highlighting, error detection, and tree view.

<>

Meta Tag Generator

Generate SEO meta tags, Open Graph, and Twitter Cards. Live preview of Google and social media results.

B64

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and URL-safe variants.

CLR

Color Converter

Convert colors between HEX, RGB, and HSL. Visual color picker with live preview and CSS output.

CSS

CSS Unit Converter

Convert between px, rem, em, %, vh, and vw. Customizable base font size and viewport dimensions.

#

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text. Instant, private, and browser-based.

%

URL Encoder & Decoder

Encode special characters for URLs or decode percent-encoded strings. Supports encodeURIComponent and encodeURI modes.

.*

Regex Tester

Test regular expressions with real-time match highlighting, capture groups, flags, and a quick reference cheat sheet.

Aa

Lorem Ipsum Generator

Generate customizable placeholder text — paragraphs, sentences, or words. Copy as plain text or HTML.

Why NexusTools?

100% Browser-Based

Your data never leaves your device. All processing happens locally in your browser.

No Account Required

Just open and use. No sign-ups, no email harvesting, no paywalls.

Fast & Free

Lightweight tools that load instantly. Free forever, supported by minimal ads.