Inspect developer primitives without uploading them.

JSON Formatter

Paste JSON to pretty-print it, check whether it parses, or minify it. The work stays on this device.

Base64 Encoder and Decoder

Convert text to Base64 or back again, with a URL-safe option. Base64 hides nothing; anyone can decode it.

URL Encoder and Decoder

Percent-encode or decode a string the way query parameters need. Full URL parsing is a different job.

UUID Generator

Create random UUID v4 values or time-ordered UUID v7 values. This is an identifier tool, not a generic random-number toy.

Hash Generator

Create a digest of text. Hashing is one-way and is not encryption. MD5 is legacy only.

JWT Decoder

Read the header and payload of a compact JWT. Decoding is not verification. A decoded token is not proven authentic.

Unix Timestamp Converter

Move between Unix epoch values and readable UTC or local dates. Seconds versus milliseconds are detected when possible.

Regex Tester

Run a JavaScript RegExp against sample text and inspect matches and groups. It is not a multi-engine debugger.

Cron Parser

Paste a standard 5-field cron string to get an English explanation and the next run times. This is Unix cron, not Quartz.