Free developer tools
Developer Tools
Generate IDs, inspect tokens, test patterns, and convert timestamps without leaving the tab. Every developer tool runs locally.
Unix Timestamp Converter
Convert Unix time (epoch seconds or milliseconds) to local date, UTC, and ISO 8601. Free timestamp and epoch converter.
Open tool →JWT Decoder
Decode a JWT header and payload in your browser. Inspect claims without verifying the signature. Free JWT decoder, nothing uploaded.
Open tool →Regex Tester
Test JavaScript regular expressions against sample text. See matches, indexes, and capture groups instantly in your browser.
Open tool →