Free Online Tools That Respect Your Privacy

73+ fast, privacy-first tools for developers and everyday tasks. Everything runs client-side in your browser — no sign-up, no tracking, no server-side processing.

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Instant Results

Every tool runs client-side for instant feedback. No waiting for servers, no loading spinners. Your data stays on your device.

100% Private

Your data never leaves your browser. Privacy-first design with no accounts, no cookies, no analytics tracking your usage.

Works Everywhere

Responsive design that works on desktop, tablet, and mobile. No app downloads needed.

Popular Tools

The most-used tools across the collection.

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JSON Formatter

Format, validate, and beautify JSON data.

Password Generator

Generate secure, random passwords instantly.

WiFi QR Code Generator

QR code that connects guests to your WiFi in one tap.

QR Code Generator

Generate QR codes from text or URLs.

Engagement Rate Calculator

Benchmark your social engagement vs. platform averages.

Caption Checker

Check captions against X, Instagram, LinkedIn, TikTok limits.

Mortgage Calculator

Calculate your monthly mortgage payments.

Color Converter

Convert colors between HEX, RGB, HSL.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes.

Browse by Category

Developer Tools

18 tools

JSON, JWT, Base64, Regex, TypeScript, and more

Text Tools

12 tools

Counters, converters, sorters, and analyzers

Converters

8 tools

Colors, units, timestamps, and data formats

Calculators

12 tools

Mortgage, BMI, percentages, dates, and more

QR Codes & Barcodes

5 tools

WiFi, vCard, email QR codes plus 1D barcodes

Social Media

5 tools

Engagement, captions, growth, post timing & sizes

Generators

8 tools

Passwords, palettes, flexbox, contrast, and CSS tools

Productivity

5 tools

Timers, notepad, and emoji picker

From the Blog

All posts

How to Create a WiFi QR Code Anyone Can Scan in 2026

Step-by-step guide to creating a free, static WiFi QR code that connects guests in one tap.

QR Code vs Barcode: When to Use Each in 2026

When to use a QR code (URLs, WiFi, contact info) vs a 1D barcode (retail SKUs, ISBNs).

How to Use QR Codes for Business Cards (vCard QR)

Why a vCard QR code on a business card outperforms paper alone — setup and design tips.