All tools

Free, no sign-up, and local-only: your input never leaves this page.

Data formats

JSON Formatter & Validator

Format, validate and inspect JSON in your browser, with precise error locations and a collapsible tree view.

Encoding & tokens

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text — UTF-8 safe, with a URL-safe variant, entirely in your browser.

Network & time

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates (and back) in UTC and your local time zone, seconds or milliseconds.

More tools on the way

This toolbox grows one tool at a time, and every tool ships with a full written guide explaining how the underlying format or protocol works — no empty shells. If a tool you need is missing, tell us: reader requests decide what gets built next.