About & Contact

What is Devstackkit?

Devstackkit is a free collection of browser-based developer utilities, built for the small, repetitive tasks that come up constantly in day-to-day development: validating a JSON payload, decoding a byte array, comparing two versions of a file, generating a UUID, or converting a number between bases. Every tool runs entirely client-side — nothing you paste in is uploaded to a server — so it's fast, works without an account, and keeps your data on your own machine.

The tools

  • JSON Parser & Formatter — validate, pretty-print, tree-view, and save JSON entries for later.
  • Byte Parser — parse comma-separated byte arrays, extract ranges with custom rules, and convert between hex, binary, and string.
  • JSON Beautifier — a lighter, no-save version of the parser for quick format/minify.
  • JSON Compare and Text Compare — line-by-line diffs between two JSON documents or two blocks of plain text.
  • GUID Generator — generate one or many random UUIDs with formatting options.
  • Base Converter — convert numbers between binary, octal, decimal, hexadecimal, and any base from 2–36.
  • XML Formatter — format, minify, and validate XML documents.
  • Encode / Decode — instant Base64 and URL encoding/decoding.

Frequently asked questions

Is Devstackkit free to use?

Yes. Every tool is free, with no account, sign-up, or usage limits.

Does any of my data get uploaded to a server?

No. Every tool — the JSON parser, byte parser, comparisons, GUID generator, base converter, XML formatter, and encoder/decoder — runs entirely in your browser using JavaScript. Nothing you paste or type is sent anywhere. "Saved" entries are written only to your own browser's local storage.

Can I use Devstackkit offline or without an internet connection?

You need an internet connection to initially load the page, but the actual parsing/conversion logic runs locally in your browser rather than calling a remote API.

I found a bug or have a feature request — how do I report it?

Use the contact form below and describe what you were trying to do, including the tool name and, if possible, the input that caused the issue.

Will you add more tools?

Yes — Devstackkit started with a JSON parser and byte parser, and has since grown to include GUID generation, JSON/text comparison, a JSON beautifier, a number base converter, an XML formatter, and Base64/URL encoding. More utilities are added over time based on what developers ask for.

Contact us

Questions, bug reports, or feature requests — send a message below.