Developer
Base Converter
Convert an integer between binary, octal, decimal and hexadecimal as you type. See all four bases, copy any row, and keep 64-bit values exact.
◆ Category
Developer tools
Format, validate and encode the things developers paste all day.
Developer
Base64 Encoder & Decoder
Encode text to Base64 or decode it back, with full Unicode support and an optional URL-safe alphabet. Runs entirely in your browser.
Developer
JSON Formatter
Format, validate and minify JSON in your browser. See the exact line and column of any error. Nothing is uploaded.
Developer
Regex Tester
Test JavaScript regular expressions against your own text. See highlighted matches, capture groups and flags — locally in your browser, with nothing uploaded.
Developer
Timestamp Converter
Convert a Unix timestamp in seconds or milliseconds to ISO 8601, UTC, local time and relative time — or turn a date back into a timestamp. Runs in your browser.
Developer
URL Encoder & Decoder
Percent-encode or decode a URL component or a whole URL, with clear errors for malformed escapes. Everything runs in your browser.