Developer Tools
90 Free Browser Tools - No Install - No Signup
90 free developer utilities that run entirely in your browser. JSON, Regex, Base64, UUID, Color, JWT, Hash, SQL, CSS and more. No install, no login, nothing sent to any server.
⭐ Most Popular
JSON Formatter
Format, validate and beautify JSON
SQL Formatter
Format SQL queries with indentation
Base64 Encoder
Encode and decode Base64 strings
UUID Generator
Generate v4 UUID and ULID
Password Generator
Secure random passwords
Hash Generator
MD5, SHA-256, SHA-512 hashes
JWT Decoder
Decode and verify JWT tokens
Color Converter
Convert HEX, RGB, HSL, CMYK
Unix Timestamp
Epoch to date and back
CSS Gradient
Linear, radial and conic gradients
Color Contrast
WCAG AA/AAA contrast ratio checker
CSS Specificity
Calculate selector specificity
Meta Tag Generator
SEO, Open Graph and Twitter cards
Regex Tester
Live regex tester with match highlight
Formatters10 tools
JSON Formatter
Format, validate and beautify JSON
SQL Formatter
Format SQL queries with indentation
YAML Formatter
Format YAML and convert to JSON
XML Formatter
Beautify and validate XML
HTML Formatter
Indent and beautify HTML
XML to JSON
Convert XML to JSON and back
JSONPath Tester
Query JSON with JSONPath expressions
JSON Schema Gen
Auto-generate JSON Schema from JSON
Diff Checker
Compare two texts side by side
Markdown Table Gen
GitHub markdown table builder
Encoders6 tools
Generators7 tools
UUID Generator
Generate v4 UUID and ULID
Password Generator
Secure random passwords
Hash Generator
MD5, SHA-256, SHA-512 hashes
JWT Decoder
Decode and verify JWT tokens
Lorem Ipsum
Generate placeholder text
Fake Data Generator
Generate realistic test data
QR Code Generator
Generate QR codes from text or URL
Converters6 tools
CSS10 tools
CSS Gradient
Linear, radial and conic gradients
Box Shadow Generator
Visual shadow builder - copy CSS
Color Contrast
WCAG AA/AAA contrast ratio checker
CSS Specificity
Calculate selector specificity
Flexbox Generator
Visual Flexbox layout builder
CSS Grid Generator
Visual Grid layout builder
Border Radius Gen
Visual rounded corners builder
CSS Animation
Keyframe animation with preview
CSS clip-path
Clip-path shape generator
CSS Filter Gen
Blur, brightness, contrast filters
SEO4 tools
Network4 tools
Text5 tools
All tools run entirely in your browser. No data is sent to any server. 100% private.