codegrapple_
100% client-side · no sign-up

Developer tools that never phone home

codegrapple is a growing toolbox of fast utilities that run entirely in your browser. Your data stays on your machine — always.

Open JSON Formatter
Instant, offline-capable Private by design Free forever

$ ls ./tools

JSON Formatter

Format, validate, minify and explore JSON with a collapsible tree view, precise error locations and one-click copy or download.

open tool
coming soon

Base64 Encoder

Encode and decode Base64 strings and files, with URL-safe variants.

coming soon

UUID Generator

Generate v4 UUIDs in bulk, with copy-all and format options.

coming soon

JWT Decoder

Inspect header, payload and signature of JSON Web Tokens locally.