24 tools available

Tools for developers

Useful online tools for developers

Data stays local
Instant
Works offline
dev-toolbox
❯ base64 encode "Hello World"
SGVsbG8gV29ybGQ=
❯ hash sha256 "secret"
2bb80d537b1da3e3…c1b273e95a5d136
❯ json format '{{"a":1}}'
{
"a": 1
}
❯
24
Tools
11
Categories
0ms
Задержка
🌐

HTML Formatter

Formatting new

Format, minify and optimize HTML code with template engine support

html formatter minify +2
⚡

JavaScript Formatter

Formatting new

Format, minify and beautify JavaScript code with flexible settings

javascript formatter minify +2
🎨

CSS Formatter

Formatting new

Format, minify and optimize CSS code with flexible settings

css formatter minify +2
📧

Email Alias Tester

Generators new

Generate email aliases and test address normalization across different providers

email alias gmail +2
📁

TreeSnap

Development new

Instant project structure snapshot with .gitignore support. Generate beautiful ASCII tree for README, docs and code review.

tree structure project +3
🚪

Super Logout

Security new

Mass logout from popular web services in one click. Sign out from Google, Amazon, YouTube and 30+ sites instantly.

logout security privacy +3
⭐

Favicon Generator

Generators new

Generate favicons, PWA icons and Web App Manifest. Works entirely in browser.

favicon pwa manifest +2
🔍

Image Upscaler

Images new

Upscale images with high quality. 2x-4x upscaling with Lanczos algorithm for art, photos and more.

upscale images enlarge +2
🛡️

JavaScript Obfuscator

Encoding new

Obfuscate JavaScript code to protect from copying and analysis

javascript obfuscator protection +2
🔄

JSON → TypeScript / Go / Zod

Generators new

Generate TypeScript interfaces, Go structs, Zod schemas and JSON Schema from JSON data

json typescript go +3
🏷️

Meta Tag Generator

Generators new

SEO, Open Graph, Twitter, and favicon meta tag generator with live preview. Free online tool.

meta seo open-graph +4
📱

QR Code Generator

Generators new

Generate QR codes with customizable color, size, logo and export to PNG/SVG

qr qr-code generator +1
🔍

Regex Tester

Development new

Regular expression testing with match highlighting and syntax explanation

regex regexp regular-expressions +5
⏰

Timestamp Converter

Converters new

Unix timestamp to date converter, timezones, duration calculator

timestamp unix date +4
🎲

UUID & Random Generator

Generators new

Online UUID v4, nanoid, random string, and secure password generator. Bulk generation of up to 10,000 values.

uuid nanoid random +3
🔐

Base64 Encoder/Decoder

Encoding new

Encode and decode text, files, and images to Base64 online

base64 encode decode +3
🎨

Color Converter

Design new

Convert colors between HEX, RGB, HSL and other formats

color hex rgb +2
📊

Diff Tool

Comparison new

Compare text, JSON, code with change highlighting

diff comparison text +2
🔐

Hash Generator

Security new

Generate MD5, SHA-1, SHA-256, SHA-512 hashes for text and files

hash md5 sha256 +2
🖼️

Image Compressor

Images new

Compress PNG, JPG, WebP images without quality loss

images compression optimization +3
📋

JSON Formatter

Formatting new

Format, minify and validate JSON online

json formatting validation +1
📄

Lorem Ipsum Generator

Text new

Generate placeholder text for design and layout

lorem ipsum placeholder text +1
📝

Markdown Editor

Editors new

Online Markdown editor with real-time preview and HTML export

markdown editor html +2
🔗

URL Encoder/Decoder

Encoding new

Free online tool for safe URL encoding and decoding. Convert special characters to URL format and back for correct parameter passing and URI component handling. Supports UTF-8, query parameters and full links.

url encode decode +5
Benefits

Why my utilities?

Tools that respect your privacy and save time

Lightning fast

Everything works locally. No delays sending data to servers

Private

Data is processed only in your browser. We don't store anything

Works offline

After loading the page, no internet is required

Free

No subscriptions, registrations or ads. Forever

© 2025 - 2026 0x69.ru

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Readme.md

whoami 👨‍💻

$ cat /etc/profile

Username: Rianvy
Real name: Maksim Alexandrov
Age: 28
Location: Tula, RU
Role: Senior Developer & UI/UX Designer 😎

About

This blog is my personal knowledge base, where I push notes about my tech stack, life experience, and everything that triggers my interest => 🚀

Contact

Open for collaboration 🤝 — ready to merge ideas and work on joint projects.

Stack

💻 Programming Languages

  • C#, PHP, JavaScript/TypeScript, Python

⚛️ Frontend

  • React / Next.js, Vue.js / Nuxt.js
  • Tailwind CSS / SCSS
  • Responsive layout (HTML, CSS, JS) 📱

🔧 Backend

  • Laravel, Node.js / Express / NestJS
  • REST APIs

🗄️ Databases

  • MySQL, PostgreSQL, MongoDB, Redis

🛠️ DevOps

  • Docker, Git, CI/CD, Linux 🐧

🎨 Design & Graphics

  • Figma — UI/UX design and prototyping
  • Photoshop — graphics and image editing
  • After Effects — motion design and animation 🎬
My Open Source Projects 🌟
Name VKify
Description A powerful browser extension for customizing VKontakte with ad blocking, themes, privacy mode, and custom CSS