Developers

OpenToolLab Toolkit

A tiny, dependency-free utility bundle backed by the same in-browser code that powers our tools. No network calls, no tracking — everything runs on the client.

Install with one script tag

Add the script anywhere on your page, then use the global OpenToolLab object.

<script src="https://opentoollab.com/toolkit.min.js" defer></script>

<script>
  OpenToolLab.formatJson('{"a": 1}');
  // '{
  "a": 1
}'

  OpenToolLab.generateUuid();
  // '5f2a...-4d81-9c2b-...'
</script>

~2 KB minified, zero dependencies, works in every modern browser. Served from the same privacy-first CDN as OpenToolLab.

API reference

OpenToolLab.formatJson(input, indent = 2) → string | null

Pretty-prints a JSON string. Returns null if the input is not valid JSON.

OpenToolLab.minifyJson(input) → string | null

Removes all insignificant whitespace from a JSON string.

OpenToolLab.generateUuid() → string

Generates a cryptographically random RFC 4122 v4 UUID.

OpenToolLab.hashText(input, algorithm = "SHA-256") → Promise<string>

Returns a lowercase hex digest of the input via the Web Crypto API.

OpenToolLab.base64Encode(input) → string

Encodes a UTF-8 string to base64.

OpenToolLab.base64Decode(input) → string

Decodes a base64 string back to UTF-8.

OpenToolLab.slugify(input) → string

Converts any text into a URL-safe slug.

License & source

The toolkit is MIT-licensed and open source. It is built from the same modules that run OpenToolLab's tools, so you get exactly the behavior you can test on this site — with the same privacy guarantees.