Tools

Create appointments and deadlines, export .ics or add to Google Calendar, Outlook and Yahoo. All in the browser.

Format and validate JSON with configurable indentation. Highlights syntax errors.

Encode and decode strings in Base64 format. Supports URL-safe Base64.

Compress and decompress text to Base64 with Pako (deflate). Valid JSON is auto-formatted.

Encode and decode strings for safe use in URLs (percent-encoding).

Convert Unix timestamp to human-readable date and vice versa. Seconds and milliseconds.

Browse the Fibonacci sequence in rows of 10, with one-click copy. BigInt precision in the browser.