Translating data between HTTP-safe formats (like URL percent-encoding) and secure transmission layers (like Base64 and JWTs) is a daily chore for full-stack developers. Our completely offline decoding toolkit allows you to inspect complex tokens and payloads securely on your local machine.
Safely parse Base64Url encoded JSON Web Tokens into their readable header and payload objects. Never paste your production auth tokens into a server-backed tool—our decoder runs entirely isolated in your DOM.
Open ToolManually construct strictly formatted JSON headers and claim payloads to completely customize and sign an HS256 secure JWT token locally.
Open ToolExtract raw Base64 data chunks from JSON configs or compiled CSS files and instantaneously render them back into viewable PNG, JPEG, or SVG image files directly to your screen.
Open ToolProcess massive, heavily percent-encoded tracking URIs and API endpoint addresses back into clear, structured, and tabulated key-value pairs for immediate analysis.
Open ToolSanitize untrusted user inputs to prevent XSS attacks by encoding mathematical symbols into safe HTML entities, or parse heavily encoded source logs back into raw readable HTML structure.
Open ToolInstantly encode arbitrary text or API keys into strict Base64 format, or cleanly decode Base64 strings back into their original Unicode format.
Open ToolSafely percent-encode reserved characters, emojis, and query strings specifically meant for HTTP transmission using the native browser URL conversion utility.
Open Tool