DartShell Dev Tools

Six offline dev tools in one popup: Base64, URL, JSON, JWT, hash and timestamp. From the maker of DartShell for Mac.

Six tools you reach for a dozen times a day, in one popup. No tab switching, no ads, no uploads. WHAT IS INSIDE Base64 — encode and decode text with correct UTF-8 handling, so Chinese, emoji and accented characters survive the round trip. Most online Base64 tools break on non-ASCII input. URL — encode a full URL while keeping : / ? & = # intact, encode a single component, or decode either one back to readable text. JSON — pretty-print with 2 spaces, 4 spaces or tabs, minify in one click, and when a document is broken you get the exact line and column instead of a vague "unexpected token". JWT — paste a token and read the header and payload side by side, with a clear expired / still valid indicator. The signature is never verified, so it is always obvious that the token is only being inspected. Hash — SHA-1, SHA-256, SHA-384 and SHA-512 through the browser's own Web Crypto API. Timestamp — paste seconds or milliseconds, the format is detected for you, and you get ISO 8601, local time, UTC and how long ago that was. PRIVACY Everything runs locally inside the popup. The extension requests no permissions at all: it has no network access, no analytics, no accounts and no storage. Nothing you paste is ever sent anywhere, and there is no server to send it to. WHO MAKES IT DartShell Dev Tools comes from the maker of DartShell, a native macOS app for SSH, SFTP, RDP, VNC and serial sessions. Each tab links to the matching free web tool, and the footer links to the Mac app.