All-in-one security toolbox for engineers and researchers
Secutils.dev is an open-source, versatile, yet simple toolbox for handling the most common security
aspects when developing, testing, or conducting reconnaissance of applications.
Programmable
webhooks, arbitrary web content and resources tracking, development certificate templates, CSP, and more - all
in one place.
Quickly deploy and program webhooks
Set up webhooks with dedicated subdomains and arbitrary paths in seconds, leveraging the full capabilities of the next-generation Deno JavaScript runtime to explore and dynamically process HTTP requests on-the-fly.
Track changes in any part of a web application
Craft tailored scripts to extract precisely the data and resources you need from any web application and receive alerts for any detected changes.
Generate development certificates easily
Effortlessly generate development certificates and private keys by replacing a multitude of CLI snippets and custom shell scripts with the user-friendly guided UI.
Humanize web security configuration
Use the Content Security Policy (CSP) builder UI to construct and manage policies of any complexity, or import policies from other web applications for analysis with just a single click.
Free tools, no signup required
Focused tools for everyday developer and security tasks. Every tool ships with a stable shareable URL (drop a
link into a ticket, an MCP agent, or a postmortem) and an AI-agent skill at /<slug>.md so
coding assistants can drive them directly.
- JWT Debugger Decode, verify, and sign HMAC JSON Web Tokens.
- SAML Decoder Inspect SAML responses, requests, and metadata.
- PEM Certificate Decoder Inspect PEM-encoded X.509 certificate chains.
- Markdown to HTML Self-contained HTML and PDF export from Markdown.
- HTTP Echo / Mock Response Build a customizable HTTP response, served as a shareable URL.