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.

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

JSON Web Tokens decoder

Pocket toolkit for developers

El Sistema Ideal para tu escuela Ideal

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.

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

Chrome DevTools extension for inspecting and decoding JWTs in real time

The offline developer's data workbench — 45 native tools (JSON, regex, JWT, codegen, hashes, crypto, time, network) in one app. Zero network, zero telemetry.

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.

JWT Analyzer is a C# CLI tool that reads, scans, and edits JSON Web Tokens for security analysis. It helps identify common JWT misconfigurations, decode claims, and modify tokens for testing purposes. Designed as an early-stage project for educational and authorized security testing.