Dev Toolkit

Format, encode, decode and convert everyday developer data in one popup, offline and with no permissions

Dev Toolkit puts the small converters developers reach for every day in one popup, and runs every one of them offline in your browser. Tools - JSON: format with 2 spaces, 4 spaces or tabs, minify, and see where invalid JSON breaks - Base64: encode and decode any text as UTF-8, standard or URL-safe - JWT: decode a token into its header, payload and signature, see exp, iat and nbf as dates with expiry flagged, check an HS256 signature, or sign a payload with HMAC-SHA256 - URL: percent-encode and decode - Timestamp: Unix seconds or milliseconds to UTC and local time, and any date, or "now", back to a timestamp - Hash: SHA-1, SHA-256, SHA-384 and SHA-512 at once - UUID: one v4 UUID, or up to 100 at once - Color: HEX, RGB or HSL in, all three out - Diff: two texts aligned line by line, the way git diff does, with a summary Made for quick work - Ctrl+Enter runs, Ctrl+Shift+C copies the result, Alt+1 to Alt+9 switch tools - Open the tools in a tab for inputs too big for the popup - Use as input sends a result on to the next tool, such as a decoded Base64 string into the JSON formatter - Reopens on the tool, mode and options you used last - The last five inputs of each tool are kept: the latest comes back when you return to it, and any of them is one pick away - A light and a dark theme, following the system unless you pick one - English and Korean, following the browser language Privacy - No permissions, no network requests, no analytics, no server - Only your recent inputs, your theme and the tool you used last are kept, in the popup's local storage on this browser - Open source: https://github.com/somaz94/dev-toolkit-google-extension