# About Tamperbox

Tamperbox provides free developer tools with local browser processing and clearly labelled server lookups. Learn how examples, reviews and limits are documented.

Canonical: https://tamperbox.dev/about

Updated: 2026-10-25

Reviewed: 2026-10-25

Tamperbox is a collection of free tools for inspecting tokens, requests, dates, public DNS, email configuration and network behavior. The tools require no sign-up. Advertising helps support the site.

## Know what a result means

Every tool documents its inputs, supported checks and limits. A DNS record is publication evidence, a network probe is an observation from its measurement location, and a synthetic example demonstrates behavior rather than a live result.

## Know where input goes

JWT, timestamp and collection-conversion web tools work locally. Domain, website and network lookups send the requested public target to our server. Other tools offer local paste modes or explicit optional lookups. REST and MCP calls transmit their inputs to our server. Read the specific tool's processing section and the [privacy policy](https://tamperbox.dev/privacy) before using it.

## Review and corrections

Tool explanations are maintained with the implementation. The updated date records the page’s latest content or metadata update. A separate reviewed date records an editorial review, not a live-check timestamp or a claim that the tool covers every possible case. Standards references and examples are included so that the behavior can be checked. Never treat a passing grade as a guarantee of security, delivery or availability.

For corrections or questions, email [developers@tamperbox.dev](mailto:developers@tamperbox.dev). For a suspected problem, include a synthetic input, the exact finding and the expected behavior from the linked standard. Do not share production credentials, private keys or private message contents.

## Reading and automation

Browse the [tool directory](https://tamperbox.dev/) and [troubleshooting guides](https://tamperbox.dev/guides). Public pages also have Markdown reading versions linked from the page. To run the same checks from Claude, ChatGPT, Codex or another assistant, see [Tamperbox for AI assistants](https://tamperbox.dev/developers).