DevSensei
Your coding big brother 💜
All tools process data 100% locally — your data never leaves your browser.
Featured Tools
Jump right into the most-loved developer tools
Shrink my images
Compress images without losing quality - 100% local processing
Preview my Markdown
Write and preview Markdown with live rendering
Fix my messy JSON
Format, validate, and beautify JSON with syntax highlighting
Give me unique IDs
Generate unique UUIDs in v1, v4, and v7 formats
Clean up my SVGs
Optimize and clean SVG files for web use
Design my gradients
Create beautiful CSS gradients with live preview
Encode my text to Base64
Encode and decode Base64 strings instantly
Convert my color codes
Convert colors between HEX, RGB, HSL, and more
Test my regex patterns
Test and debug regular expressions with live matching
Hash my strings
Generate MD5, SHA-1, SHA-256, and other hashes
Decode my JWT token
Decode and inspect JWT tokens without external servers
What time is this timestamp?
Convert between Unix timestamps and human-readable dates
All Tools
Browse our complete collection of 54 developer tools
Favicon Generator
Generate all favicon sizes from a single image for web, iOS, Android & PWAs
JSON Path Finder
Interactive JSON explorer - click any value to copy its path instantly
Tailwind Config Generator
Visual builder for Tailwind CSS configuration with live preview
Git Command Generator
Visual Git command builder - select operations and get exact commands
API Tester
Test REST APIs directly in your browser - like a mini Postman
Slug Generator
Create SEO-friendly URL slugs from any text instantly
CSS Snippets
Collection of 50+ modern UI components and CSS snippets
Face Style Analysis
Get personalized beard, hairstyle, and sunglasses recommendations
Image Compressor
Compress images without losing quality - 100% local processing
Image Resizer
Resize images to any dimension with quality control
Code to Image
Create beautiful images of your code for sharing
Background Remover
Remove image backgrounds with AI precision in seconds
JSON Schema Generator
Generate JSON Schema from sample JSON instantly
Color Contrast Checker
Check WCAG contrast ratios for text and UI colors
Markdown Preview
Write and preview Markdown with live rendering
JSON Formatter
Format, validate, and beautify JSON with syntax highlighting
Text to Handwriting
Convert typed text to realistic handwriting images
UUID Generator
Generate unique UUIDs in v1, v4, and v7 formats
SVG Optimizer
Optimize and clean SVG files for web use
Gradient Generator
Create beautiful CSS gradients with live preview
QR Code Generator
Generate QR codes for URLs, text, WiFi, and more
Base64 Encoder
Encode and decode Base64 strings instantly
Color Converter
Convert colors between HEX, RGB, HSL, and more
Regex Tester
Test and debug regular expressions with live matching
Hash Generator
Generate MD5, SHA-1, SHA-256, and other hashes
JWT Decoder
Decode and inspect JWT tokens without external servers
Lorem Ipsum Generator
Generate placeholder text in various styles
CSS Minifier
Minify and compress CSS code for production
Timestamp Converter
Convert between Unix timestamps and human-readable dates
URL Encoder
Encode and decode URL strings safely
Password Generator
Generate secure, random passwords with customizable options
Case Converter
Convert text between camelCase, snake_case, UPPERCASE, and more
Word Counter
Count words, characters, sentences, and reading time
Text Diff
Compare two texts and highlight differences
String Escape
Escape and unescape strings for JSON, HTML, and URLs
JSON to TypeScript
Generate TypeScript interfaces from JSON data
HTML to JSX
Convert HTML markup to React JSX syntax
SQL Formatter
Format and beautify SQL queries for readability
Cron Parser
Parse and explain cron expressions in human readable format
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal
Unit Converter
Convert between units of length, weight, temperature, and more
JSON to CSV
Convert JSON arrays to CSV format for spreadsheets
XML to JSON
Convert XML documents to JSON format
Box Shadow Generator
Design CSS box shadows with live preview
Border Radius Generator
Create custom border radius with visual editor
Meta Tag Generator
Generate SEO meta tags and Open Graph tags
Color Palette Generator
Generate harmonious color palettes from a base color
HTML Entity Encoder
Encode and decode HTML entities and special characters
Image Metadata Stripper
Remove EXIF metadata from images to protect privacy
Password Strength Checker
Analyze password strength with smart suggestions
Markdown Table Generator
Generate Markdown tables with headers and alignment
CSS Clamp Generator
Create fluid typography and spacing with clamp()
HTTP Status Lookup
Search and explain HTTP status codes instantly
UTM Builder
Build tracked URLs with UTM parameters
Browse by Category
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Your Data Never Leaves Your Browser
Every tool on DevSensei processes data locally using WebAssembly and JavaScript. We don't upload, store, or track any of your data. What happens in your browser, stays in your browser.