Encoders & Utilities tools
The small utilities that fill an engineering day: encoding, hashing, UUIDs, cron expressions, regex testing, diffs and identifier generators.
Base64 Encoder / Decoder
Encode and decode base64 and base64url, with a hex view and the HTTP Basic auth header form built for you.
Cron Expression Parser
Validate a five-field cron expression and calculate its next scheduled run times.
JWT Decoder
Decode a JWT header and payload, check the standard claims and see expiry status - locally, without sending the token anywhere.
MAC Address Formatter & Generator
Convert a MAC address between every vendor notation, decode its address bits, and generate valid locally administered addresses.
Regular Expression Tester
Test a JavaScript regular expression, flags and capture groups entirely in the browser.
Text Diff
Compare two text blocks line by line and produce a compact, copyable diff for careful configuration review.
UUID Generator
Generate v4 random and v7 time-ordered UUIDs in bulk, with the format variants tooling expects and an explanation of when v7 is the better choice.