Free developer tools. Nothing leaves your browser.

Strong random passwords with configurable length and character sets.

Memorable diceware-style passphrases from a 7,776-word list.

Hash and verify passwords with bcrypt, with adjustable cost, in your browser.

Convert text and files to and from Base64, UTF-8 and URL-safe.

Percent-encode and decode URLs and query parameters, live as you type.

Validate, pretty-print and minify JSON, with precise error locations.

SHA-256, SHA-512, SHA-1 and MD5 hashes for text and files.

QR codes for links, text and Wi-Fi, ready to download as PNG or SVG.

Decode JSON Web Tokens and verify signatures, fully in your browser.

Generate UUIDs (v4, v7 & more) in bulk, with export options.

Unix timestamps to human-readable dates and back, live and in ISO 8601.

The current ISO calendar week at a glance, plus every week of any year.

What 99.9% really means: allowed downtime for any SLA target.

What form spam, lost customers, extra traffic and a serious attack cost your website in a month.