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

Web application to track and analyze workout data.

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

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.

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

JSON Web Tokens decoder

Pocket toolkit for developers

El Sistema Ideal para tu escuela Ideal

🔍 Analyze and edit JSON Web Tokens with JwtAnalyzer, a C# CLI tool for security assessments and educational purposes.

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

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.

Chrome DevTools extension for inspecting and decoding JWTs in real time

30 free browser-based developer tools. JSON formatter, regex tester, JWT decoder, UUID generator, QR code generator and more. No login, no ads.

Free, fast, and private developer tools. No ads, no tracking. 12 tools: JSON Formatter, Regex Tester, Color Converter, and more.

JWT-Sem is an educational repository for exploring JSON Web Tokens (JWT) and software security concepts. It includes practical examples and challenges, covering JWT encoding, decoding, signature verification, and simplified RSA operations. The repository also features a web tool with JWT and RSA functionalities to help illustrate these concepts.