Auva/Lab

Every tool you need.
All in one place.

Free, fast, client-side developer & productivity tools. No sign-up needed. No data leaves your browser.

QR Code Studio

Generate, customize, and download QR codes for URLs, text, WiFi, vCards, and more. With color, logo, and style options.

GeneratorsOpen

Password Generator

Generate cryptographically secure passwords with customizable length, characters, and real-time strength analysis.

SecurityOpen

JSON Formatter

Format, validate, minify, and compare JSON data with syntax highlighting, tree view, and error detection.

DeveloperOpen

Base64 Encoder

Encode and decode text and files to/from Base64 instantly. Supports UTF-8 and binary data.

DeveloperOpen

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Compare and verify checksums.

SecurityOpen

UUID Generator

Generate UUIDs v4, nanoids, and custom random IDs. Bulk generate, copy, and validate instantly.

DeveloperOpen

Color Converter

Convert colors between HEX, RGB, HSL, and OKLCH. Pick colors, generate harmonies, and check contrast.

DesignOpen

Code Sandbox

Live HTML, CSS, and JavaScript editor with instant preview and syntax highlighting.

DeveloperOpen

JWT Debugger

Decode, verify, and inspect JSON Web Tokens with split header, payload, and signature views.

SecurityOpen

Diff Checker

Professional side-by-side text and code comparison to highlight differences.

DeveloperOpen

Regex Tester

Test and debug regular expressions in real-time with match highlighting, groups, and flags support.

DeveloperOpen

Lorem Ipsum

Generate placeholder text in paragraphs, sentences, or words. Copy with one click for your designs and mockups.

DesignOpen

Data Converter

Convert instantly between JSON, YAML, and CSV structures.

DataOpen

URL Encoder

Encode and decode URLs, text, and parameters with perfectly safe string escaping.

DeveloperOpen

Image Converter

Instantly convert WebP, PNG, and JPEG formats with compression directly in-browser.

MediaOpen

PDF Studio

Combine multiple images and PDF documents into a single file locally.

MediaOpen