The launcher

Developer utilities

Every small dev tool in one field, answering as you type, offline: JSON, Base64, JWT, UUIDs, timestamps, regex, passwords, text cases, diffs, colors and QR codes.

FreeMac

Jevie’s palette, as the app draws it. Press a sentence on this page to see it, and to copy it.

Use it How it works Limits Where it's kept

Use it

Data

format the json in my clipboardvalidate json my clipboardJSON formatted, minified or checked
base64 decode my clipboardurl decode hello%20worldEncode and decode
decode jwt eyJ…eyJhbGciOi…Header, claims and expiry of a pasted token
uuid5 uuidsuuid v7Random or time-ordered
unix timecurrent unix timestamp2026-10-02 14:00 to unixTimes both ways
regex testertest datagive me fake test dataPatterns tested live; synthetic JSON or CSV records

Text

snake case myVariableNameslugify My Post TitleEvery code and title case
sort lines in my clipboarddedupe lines in my clipboardTidy text line by line
word count of thislorem ipsum 3 paragraphsCounts, and placeholder text
compare textdiff checkerOriginal and revised side by side
tone checkvirality check: just shipped our new appA draft judged before you post

Passwords, colors and codes

32 character password without symbolspassphraseMade fresh, never kept
color pickerhex for coralconvert #ff6600 to rgbPick any pixel, convert HEX/RGB/HSL, keep named colors
qr code of my clipboardwifi Home password hunter2A QR code, even one that joins Wi-Fi

How it works

Each tool answers on your Mac as you type, with no network, from the sentence or else the clipboard; ↵ copies the result. Type a tool's name and press Tab to keep typing straight into it.

Passwords and decoded tokens are never kept in Jevie's history.

Limits

A JWT is read, never verified.
Text tools read the sentence or the clipboard, not a selection in another app.
The tone and virality checks send the draft to Jevie's model once to score it; everything else works offline.
The regex tester, test data, compare text and color tools are drawn only on the Mac.

Where it's kept

Nothing is stored except saved and picked colors (in the app's own preferences) and QR pictures (~/.jevie/media).

In Jevie, help json answers from this page as you type.

Updated 7 November 2026 · Something wrong or missing? Tell us