About DevKDP

Free, instant developer utilities.

What this is

DevKDP (dev.kdp.cool) is the developer-utilities family in the Kdp.Cool tool portal. Each tool is a single-purpose, browser-side utility: paste your input, see results instantly, copy or share — nothing is sent to a server.

The lineup

• JSON Formatter (live) — Format, minify, and validate JSON in real time. Indent with 2 spaces, 4 spaces, or tabs. Line-level error reporting plus depth and key-count statistics.
• Base64 Encoder / Decoder (live) — UTF-8-safe text encode/decode plus binary file upload via FileReader. URL-safe variant supported for JWT-style tokens.
• Regex Tester (planned) — Live JavaScript regex matcher with capture-group highlighting and flag toggles.
• JWT Decoder (planned) — Decode and inspect JSON Web Tokens, with header / payload / signature breakdown.

Why it exists

Most online developer tools are wrapped in autoplay videos, popups, and email-walls for "premium" features that should be free. We built DevKDP because we wanted the opposite: instant results, no signup, no tracking of inputs, no nonsense.

How we keep it free

The site is supported by Google AdSense. We aim to keep ads non-intrusive — fixed layout positions, no auto-playing video, no popups. If you'd like to support us further, simply share a link.

Our methodology

• Browser-side only: every tool runs in your browser. The JSON you paste, the file you upload, the Base64 you decode — none of it touches our servers.
• Standards first: parsing uses the browser's native JSON.parse; Base64 uses btoa / atob with UTF-8 wrapping; URL-safe Base64 follows RFC 4648 §5.
• Open source: the site's code is on GitHub at github.com/kedoupi/kdp-tools. Found a bug? Open an issue.

What's next

Active work is on expanding the tool set: a regex tester, JWT decoder, URL encoder, hash generator, and color picker. Suggestions welcome — see Contact.

Contact

See Contact.