All tools

20 tools, grouped by what they operate on. Each one is a single page with no sign-in and no account. Most do their work in your browser; the ones that have to reach the network are marked, and say what they send.

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JSON

Read, repair and convert JSON documents.

Encoding

Move text between wire formats.

Security

Inspect tokens, headers and secrets.

Development

Everyday utilities for building software.

HTTP

Send, receive and compare real HTTP traffic.

Web

The files and tags that sit in front of a site.

Time

Timestamps, schedules and conversions.

Unix Timestamp ConverterConvert timestamps and dates.

HTTP API

The server-backed tools run on a small public API — header checks, page metadata, URL comparison, request forwarding, webhook capture and mock servers. It needs no key and every endpoint is documented, with its limits, in the API reference.

How these work

Fourteen of these tools do their work in your browser: you can open the network panel and watch nothing leave the page. The six marked server cannot — you cannot read another site's response headers, receive a webhook, or serve an API from a tab — so they run on R3X infrastructure and say on the page exactly what is sent, what is kept, and for how long.