Developer Tools
Free JSON, encoding, URL, data, and developer utilities.
QR Code Generator
Create and download QR codes for URLs and text locally in your browser.
Base64 Encoder / Decoder
Encode plain text to Base64 or decode Base64 text.
CSV to JSON Converter
Convert simple comma-separated values into a JSON array.
Color Contrast Checker
Check the WCAG contrast ratio between two hexadecimal colors.
Color Converter
Convert HEX colors to RGB and RGB colors to HEX.
HTML Entity Encoder
Encode special characters for HTML or decode HTML entities.
Hex / Decimal Converter
Convert between hexadecimal and decimal integers.
JSON Formatter
Format, minify, and validate JSON directly in your browser.
JSON to CSV Converter
Convert a flat JSON array of objects into CSV in your browser.
Timestamp Converter
Convert Unix timestamps to readable dates and back.
URL Encoder / Decoder
Encode or decode URL components safely.
URL Query Parser
Parse a URL into origin, path, query parameters, and fragment.
URL Slug Generator
Convert a title or phrase into a clean lowercase URL slug.
UUID Generator
Generate standards-compatible random UUID version 4 identifiers.
Unix Time Now
View the current Unix timestamp in seconds and milliseconds.