Text tools that run in your browser

The text tools handle the small, constant chores of working with developer text: test a regular expression against real input with live highlighting, diff two versions of a config line by line, translate a cron expression into plain English with its next run times, convert identifiers between camelCase, snake_case and kebab-case, build clean URL slugs, and turn Unix timestamps into readable dates.

Each one gives an answer as you type, with no submit-and-wait round trip — because there is no server involved. Logs, tokens and proprietary snippets you paste here stay in this tab.

All 6 text tools

Case ConvertercamelCase, snake_case, kebab-case, PascalCase and more.Unix Timestamp ConverterConvert Unix time to ISO dates and back, locally.Regex TesterTest regular expressions with live match highlighting.Text DiffCompare two texts line by line and see what changed.Cron Expression ExplainerTurn cron expressions into plain English and next runs.Slug GeneratorTurn any title into a clean, URL-safe slug.

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Guides

How to fix “Unexpected token” in JSONUnexpected token means the parser hit illegal syntax: a trailing comma, single quotes, comments or an HTML error page. Find the exact line locally.
How to decode a JWT (and why that isn't verifying it)Split the token on its two dots and Base64URL-decode the first two segments — no key needed. Decoding shows the claims but never verifies anything.
UUID v4 vs v7: random or time-ordered?v4 is 122 random bits; v7 leads with a 48-bit timestamp so IDs sort by creation time (RFC 9562). v7 suits database keys, v4 hides creation time.
Unix timestamps: seconds vs millisecondsCount the digits: 10 means seconds, 13 means milliseconds. Mixing them lands in January 1970 or the year 56637 — two bug signatures explained.

Looking for something else? Browse thefull tool directoryor readhow the local-only processing works.