Security

DevUtilKit applies practical safeguards for query execution, rate limiting, and exposure minimization in operational logs.

1. SQL Runner Security

SQL Runner accepts only SELECT statements. Before any query reaches the database, a parser validates the statement type in the application layer, and that validation is completed before any database connection is opened for execution. Queries beginning with INSERT, UPDATE, DELETE, DROP, CREATE, ALTER, TRUNCATE, or any other non-SELECT keyword are rejected immediately with a clear error response. This design removes ambiguity around what operations are allowed and ensures that mutation-oriented SQL does not reach the database execution path at all. In other words, statement validation is not a best-effort convention; it is a strict gate in request processing.

Every query executed through SQL Runner is subject to a hard 5-second timeout enforced at the database connection level. If a query does not complete within 5 seconds, the active database connection is terminated and an execution error is returned to the user interface. This timeout control exists to prevent resource exhaustion caused by expensive joins, missing filters, accidental full-table scans, or other unbounded query patterns. The timeout policy protects both system stability and user experience by ensuring one long-running request cannot monopolize backend resources needed by other users.

SQL Runner enforces a rate limit of 30 queries per minute per IP address. Requests that exceed this threshold receive an HTTP 429 response and are not forwarded for execution. This policy is implemented to reduce automated abuse, dampen burst traffic, and protect fair access for normal interactive usage. Rate limiting also helps preserve predictable latency by preventing a single client from saturating shared capacity. In operational terms, this limit is part of the service abuse-prevention model and is continuously monitored alongside backend health and error rates.

The database user account used by SQL Runner has SELECT-only grants at the database engine level. Even if application-layer validation were bypassed, write operations would still fail because the SQL Runner account has no INSERT, UPDATE, DELETE, or DDL permissions. This is intentional defense in depth: both application logic and database permissions must allow execution before a statement can run. In addition, each query runs on a fresh connection, and there is no shared session state between different users or between sequential requests from the same user, which prevents cross-request leakage through session-level settings or temporary state.

2. Browser-side Tool Security

The following tools process all data locally in the browser: JSON Formatter, JWT Decoder, Base64 Converter, URL Encoder/Decoder, UUID Generator, Timestamp Converter, Cron Interpreter, Regex Tester, and CSV to JSON. None of these tools send user input data to DevUtilKit servers during normal operation. Processing happens entirely in JavaScript running in the active browser tab. Users who want to verify this behavior can open browser DevTools with F12, switch to the Network tab, and then use these tools while observing network activity; they should not see outbound requests carrying their input data to devutilkit.com. This local-first architecture was selected deliberately because these utilities often handle sensitive information such as JWT tokens with identity claims, API payloads containing business records, and encoded strings that may include credentials or internal identifiers.

3. HTTPS and Transport Security

All traffic to devutilkit.com is served over TLS 1.2 or higher. The platform sets an HTTP Strict Transport Security (HSTS) header so compatible browsers are instructed to use HTTPS for future visits, reducing protocol downgrade risk. Requests that arrive over plain HTTP are redirected to HTTPS automatically. Together, these controls protect data in transit between users and the service and help prevent interception scenarios caused by insecure transport.

Transport protection is only one layer of the model. We also encourage users to verify route behavior directly in browser developer tools when handling sensitive values, especially for browser-side utilities. Confirming whether a route triggers outbound traffic helps teams choose the safest workflow for each task. This is particularly relevant during incident response, where speed pressure can otherwise lead to unnecessary exposure of payloads, tokens, or internal identifiers.

4. No User Account Database

DevUtilKit has no login system, no user registration workflow, and no user account database. There are no stored passwords, no persistent session tokens tied to user identities, and no profile records to maintain. This materially reduces one of the most common breach categories in web products: credential theft and account takeover datasets. In practical security terms, if the credential store does not exist, it cannot be exfiltrated from the platform.

This design choice also simplifies security operations: fewer identity surfaces means fewer reset flows, fewer account-recovery vectors, and fewer opportunities for privilege escalation bugs tied to user state. The tradeoff is intentional. DevUtilKit is built as a focused utility platform where most value comes from fast, bounded tooling and clear documentation rather than persistent personalized accounts.

5. Responsible Disclosure

If you discover a security vulnerability in DevUtilKit, please report it responsibly before any public disclosure. Send your report to security@devutilkit.com with a clear vulnerability description, reproducible steps, and an impact summary so triage can begin quickly. We aim to respond within 72 hours of receiving a report. We also request a reasonable remediation window to investigate, patch, test, and deploy a fix before details are shared publicly. For broader handling context, see Data Handling.