Text & String
Word Counter Case Converter String Reverse Duplicate Line Remover Sort Lines Text Diff Checker Lorem Ipsum Generator Slug Generator Text Repeater
Web / HTML
HTML Encoder/Decoder URL Encoder/Decoder HTML Formatter HTML Minifier HTML to Markdown Markdown to HTML Meta Tag Generator OG Tag Generator Robots.txt Generator .htaccess Generator Favicon Generator
CSS Tools
CSS Formatter CSS Minifier Box Shadow Generator Border Radius Generator Gradient Generator Flexbox Visualizer Grid Generator px ↔ rem Converter CSS Specificity Calc
JS & JSON
JS Formatter JS Minifier JSON Formatter JSON to CSV JSON to XML JSON Path Tester
Encode & Hash
Base64 Encoder/Decoder URL-Safe Base64 MD5 Hash Generator SHA Hash Generator HMAC Generator BCrypt Hash Generator JWT Decoder Password Generator Password Strength File Hash Generator
Generators
UUID Generator Nano ID Generator Random String Generator QR Code Generator Barcode Generator
Date & Time
Unix Timestamp Date Difference Timezone Converter Cron Builder
Color Tools
Color Picker Palette Generator Contrast Checker Tint & Shade Image Color Extractor
Regex & Testing
Regex Tester Diff Checker cURL Generator HTTP Status Codes MIME Type Lookup
Number & Math
Number Base Converter Roman Numeral Converter Random Number Generator Percentage Calculator Ratio Calculator
Miscellaneous
IP Lookup DNS Lookup SSL Checker Word Frequency CSV Table Viewer CSV to JSON XML Formatter YAML to JSON JSON to YAML SVG Optimizer
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79 essential tools for web developers & programmers to help improve code with less effort. Format, validate, encode, generate, convert & more — Everything runs in your browser. Nothing stored, nothing sent.

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11 Categories · 79 Tools

Text & String
9 tools
Web / HTML
11 tools
CSS Tools
9 tools
JS & JSON
6 tools
Encode & Hash
10 tools
Generators
5 tools
Date & Time
4 tools
Color Tools
5 tools
Regex & Testing
5 tools
Number & Math
5 tools
Miscellaneous
10 tools
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Top Tools This Week

JSON Formatter
Validate & pretty-print JSON
Base64 Encoder/Decoder
Encode & decode Base64 strings
Regex Tester
Live regex match highlighting
UUID Generator
v1, v4, bulk generation
Password Generator
Secure, customizable passwords
Color Picker
HEX ↔ RGB ↔ HSL ↔ HSV
Nothing Stored
Everything runs client-side. Nothing is sent to our servers.
Instant Results
Pure JavaScript — no waiting for server round-trips.
Any Device
Desktop, tablet & mobile. No app install required.
Always Free
No limits, no tiers, no hidden fees. Ever.