Developer tools

Quick utilities for everyday work: formatting, encoding, security, colours, text and time. No account, no ads, right in your browser.

Data & encoding

JSON formatter & validator: Pretty-print, minify, sort keys and pinpoint syntax errors.
Base64 encoder / decoder: UTF-8 text or files to Base64, including URL-safe and Data URLs.
URL encoder & parser: encodeURIComponent, decoding and breaking a URL into parts.
JWT decoder: Read a token's header and payload and check its expiry.
HTML entities: Encode or decode special characters for HTML.
Number base converter: Binary, octal, decimal, hex and any base up to 36.

Hash generator (SHA, HMAC): SHA-1, SHA-256, SHA-384, SHA-512 and HMAC for text or files.
Password generator: Strong passwords with entropy and estimated time to crack.
UUID generator (v4, v7): Random or time-ordered unique identifiers.
chmod calculator: Linux permissions in octal and symbolic form.

Colour converter & palettes: HEX, RGB, HSL and a full 50–950 scale generated for you.
Contrast checker (WCAG): Check whether text is readable under AA and AAA.
CSS gradient generator: Linear, radial and conic gradients with a live preview.
Box-shadow generator: Soft, modern shadows with CSS and Tailwind code.
px ↔ rem converter: Turn pixels into rem for accessible typography.
Meta & Open Graph tag generator: SEO and social tags with Google and social card previews.

Unix timestamp converter: Timestamps to dates in local time and UTC, and back.
Cron expression explainer: Understand a cron expression and see its next runs.
Transfer time & data units: How long a download takes, plus KB, MiB, GB conversions.