jwt-decoder

A collection of developer utilities in a single desktop application

Web app that can hash/hmac, encrypt/decrypt, and sign/verify the data, debug JWT tokens, parse and edit ASN1 structures, compute diffs, and more

85 free browser-based developer tools — AES, SHA, JWT, Base64, JSON, Regex, Diff, QR and more. 100% client-side. No login. No tracking.

Plain toolbelt for developers

A simple JWT decoder extension for VS Code

Privacy-first URL analyzer. Parse, decode & inspect URLs in the browser — JWT, timestamps, Base64, JSON. No data sent to servers.

Web application to track and analyze workout data.

Free, open-source developer utilities that run entirely in your browser. 700+ tools across 34 categories.

9-in-1 browser-based developer toolkit. Single HTML file. No dependencies.

BLACKSURFACE is an offensive security reconnaissance and attack-surface mapping platform designed for bug bounty hunters, red teamers, and Penetration Testers. It centralizes reconnaissance workflows, tools, and intelligence into a single, high-impact command interface.

Developer-focused cookie manager for security learning and backend testing.

A self-hosted, privacy-first developer toolkit. JSON formatter, diff checker, Base64 codec, code beautifier, regex tester, URL codec, JWT decoder, and color converter. All running 100% client-side. No tracking, no cookies, no server calls, no logging

JSON Web Tokens decoder

Free browser-based developer tools — JSON formatter, JWT decoder, regex tester, UUID generator, and more. No signup, no tracking, no server.

Privacy-first Chrome extension to decode, inspect & verify JSON Web Tokens - 100% offline.

Pocket toolkit for developers

El Sistema Ideal para tu escuela Ideal

Decode and verify JWTs fully offline — one HTML file, CSP-provable no network

32 developer tools in a single HTML file. Zero dependencies, zero build, zero network calls. Works on your locked-down work laptop.

Free privacy-first developer tools that run entirely in your browser — JSON formatter, JWT decoder, regex tester, cron generator, diff checker & smart checklist. No login, no uploads.