Dev Kit help

The small conversions you reach for a few times a day, in one page that loads offline. Nothing you paste leaves the tab.

The panels

• JSON. Format, minify, and sort keys. Bad input points at the line.
• Regex. Test a pattern against sample text, see every match and group.
• Cron. Read a 5 or 6 field expression in plain words and list the next run times in UTC.
• Encode and decode. Base64, URL, HTML entities, both directions.
• Hash. MD5, SHA-1, SHA-256, SHA-512 of any text.
• Time. Unix timestamp to date and back, in local time and UTC.
• JWT. Decode the header and payload. It does not verify the signature.
• Text. Case changes, sort lines, dedupe, count words and characters.

Notes

• The panel is in the URL, so a bookmark reopens the one you use.
• MD5 and SHA-1 are for checksums and legacy systems, not for security.
• The JWT panel is a decoder. It never checks whether a token is valid.

Every panel runs in your browser. Nothing you type or drop is uploaded.