Developer

JSON, encoding, regex, hashes & IDs

Format, validate and minify JSON in your browser. 2/4/tab indent, sort keys, exact line and column errors, and big-integer safe mode. Nothing is uploaded.

Base64 Encoder & Decoder

Encode and decode Base64 in your browser — text, files, URL-safe, MIME line wrap and data URLs. UTF-8 correct, no uploads, no size limit.

URL Encoder & Decoder

Percent-encode and decode URLs in your browser. Choose encodeURIComponent or encodeURI, handle + as space, and break any URL into its parts.

Regex Tester

Test JavaScript regular expressions live: match highlighting, capture group table, named groups and replace preview — with a catastrophic-backtracking guard.

Hash Generator

Get MD5, SHA-1, SHA-256, SHA-384 and SHA-512 at once for text or a file, with HMAC, hex/Base64 output and checksum verification. All in your browser.

UUID Generator

Generate UUID v4 or time-ordered v7 in bulk, with uppercase, braces and no-hyphen formats. Plus a UUID inspector that decodes version and timestamp.

Unix Timestamp Converter

Convert Unix timestamps to dates and back, in seconds, milliseconds, microseconds or nanoseconds. Any IANA timezone, ISO 8601, RFC 2822 and batch conversion.