Free Online Tools, Instantly
32+ free tools that run entirely in your browser. No sign-up, no tracking, no data leaves your device.
Popular Tools
JSON Formatter & Validator
Format, validate, and minify JSON data instantly.
Open tool →Base64 Encoder & Decoder
Encode text to Base64, or decode Base64 back to plain text. Supports full UTF-8.
Open tool →UUID v4 Generator
Generate random UUIDs (v4) in bulk with one click.
Open tool →Password Generator
Generate secure passwords with crypto.getRandomValues(). Length slider, character sets, entropy meter.
Open tool →JSON to CSV Converter
Convert JSON arrays to CSV format with one click. Supports nested objects.
Open tool →Regex Tester
Test regular expressions in real-time with match highlighting and capture group display.
Open tool →Color Picker
Pick colors and convert between HEX, RGB, HSL, CMYK. Check WCAG contrast ratios.
Open tool →Life Progress Bar — 4000 Weeks
Visualize how much of your life has passed with the 4000 Weeks grid. Enter your age and see your weeks.
Open tool →✨ New Tools
View all →HTML Entity Encoder & Decoder
Encode special characters to HTML entities or decode entities back to text.
Open tool →JWT Decoder
Decode and inspect JSON Web Tokens (JWT) — view header, payload, and expiration.
Open tool →Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal bases instantly.
Open tool →CSS Unit Converter
Convert between px, rem, em, pt, and other CSS units with a configurable base font size.
Open tool →Image to Base64 Converter
Convert images to Base64 data URLs for embedding directly in HTML or CSS.
Open tool →Word Counter & Text Analyzer
Count words, characters, sentences, and paragraphs. Estimate reading and speaking time.
Open tool →Browse by Category
Formatters
Format and beautify code and data · 1 tool
Encoders & Decoders
Encode and decode data formats · 4 tools
Generators
Generate random data and identifiers · 4 tools
Converters
Convert between data formats · 5 tools
Text Tools
Analyze, clean, and transform text · 6 tools
Calculators
Calculate numbers, dates, and more · 5 tools
Time & Date
Work with timestamps, dates, and time · 3 tools
Finance & Business
Financial calculators and business tools · 1 tool
Image, Color & Design
Color pickers, image tools, and design · 3 tools
From the Blog
All posts →What Is Base64 Encoding and When Should You Use It?
Learn what Base64 encoding is, how it works, and the most common use cases for encoding binary data as text — including data URLs, email attachments, and API payloads.
How to Generate Strong Passwords: A Complete Guide
Learn why strong passwords matter, what makes a password secure, and how to generate unbreakable passwords using cryptographically secure methods.
Understanding UUID v4: When and Why to Use Random Identifiers
Everything you need to know about UUID v4 — how they work, why they are practically unique, and best practices for using them in databases and APIs.
Why QuickNib?
QuickNib provides free, fast, and private online tools for developers, designers, and everyone who works with data. Every tool runs entirely in your browser — your data never leaves your device. No account required, no cookies, no tracking.
Whether you need to format JSON, generate a UUID, encode Base64, convert timestamps, calculate loan payments, or pick the perfect CSS gradient — QuickNib has you covered with 32+ tools and growing.