KHTHON
/
khthon.co.uk

A field kit for daily work

Everything you reach for between commits, kept in one strata.

Khthon bundles the seven tools you open a dozen times a day — formatting, testing, converting — into one page that starts fast and remembers nothing you don't ask it to.

JSON Formatter

Validate, beautify, minify and explore JSON without leaving the tab.

Empty
Input
Output

Regex Tester

Live matching, capture groups and a quick-reference cheat sheet.

/ /
No pattern
Test string
Matches

Matches will appear here.

Replace
Quick reference

API Tester

Send a request straight from your browser and inspect the response. Subject to the target server's CORS policy.

Snippet Manager

Keep the code you copy-paste on repeat, tagged and searchable, saved to this browser.

    Colour Palette Generator

    Generate, lock and export palettes. Press Space to reshuffle unlocked swatches.

    Markdown Previewer

    Write on the left, read on the right. Rendered with sanitised HTML.

    Markdown
    Preview

    Image Converter

    Convert between PNG, JPEG and WebP, and resize, entirely on-device.

    Drop an image or

    PNG, JPEG, WebP, GIF, BMP — converted locally, never uploaded.