Your Coding
Big Brother
DevSensei fixes your mistakes, guides your code, and provides instant solutions. All processed locally — your data never leaves your browser.
Popular Tools
Jump right into the most-used developer tools
Fix my messy JSON
Format, validate, and beautify JSON with syntax highlighting
Shrink my images
Compress images without losing quality - 100% local processing
Encode my text to Base64
Encode and decode Base64 strings instantly
Give me unique IDs
Generate unique UUIDs in v1, v4, and v7 formats
Convert my color codes
Convert colors between HEX, RGB, HSL, and more
Test my regex patterns
Test and debug regular expressions with live matching
Preview my Markdown
Write and preview Markdown with live rendering
Hash my strings
Generate MD5, SHA-1, SHA-256, and other hashes
Decode my JWT token
Decode and inspect JWT tokens without external servers
Clean up my SVGs
Optimize and clean SVG files for web use
What time is this timestamp?
Convert between Unix timestamps and human-readable dates
Design my gradients
Create beautiful CSS gradients with live preview
Browse by Category
Find the perfect tool for your task
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.