PrismKit

PrismKit is a developer's Swiss Army knife: a collection of fast tools that run entirely on your iPhone and iPad — offline, with nothing ever sent to a server.

Paste a production token, a private config, or any sensitive data with confidence. Everything is processed locally on your device.

TOOLS INCLUDED

• JSON ↔ YAML — Convert between both formats in either direction.
• JSON ↔ TOON — Convert to and from TOON, the compact format that saves tokens when working with AI models.
• JSON Format — Format, validate, and minify with error detection.
• Base64 — Encode and decode text.
• URL Encode — Encode and decode URL strings.
• JWT Decoder — Inspect the header and payload, see the expiry, and verify the HMAC signature (HS256, HS384, and HS512).
• Hash — Generate SHA-256, SHA-512, and MD5.
• QR Code — Generate and customize QR codes with colors, a logo, and PNG export.
• UUID — Generate unique identifiers in batches.
• Regex Tester — Test regular expressions and see matches and their groups.
• Diff — Compare two versions of text line by line and spot the differences.

BUILT TO BE FAST

• Command palette (⌘K) to jump to any tool in seconds.
• Mark your favorite tools to keep them within reach.
• Copy any result with a tap.
• Optimized for iPhone and iPad, with a two-column layout on larger screens.
• Light, dark, and automatic themes.

PRIVACY FIRST

• 100% offline: no tool needs an internet connection.
• No accounts, no analytics, no ads, no tracking.
• We collect absolutely no data.

Made by developers, for developers.