Developer Tools
JSON, Base64, UUID, hashing, URL encoding and regular expressions.
Small utilities that save developers time. Format and validate JSON, encode and decode Base64, generate UUIDs, compute hashes, URL-encode strings, and test regular expressions with a live matcher.
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How these tools work
Small utilities that save developers time. Format and validate JSON, encode and decode Base64, generate UUIDs, compute hashes, URL-encode strings, and test regular expressions with a live matcher. Every tool in this category publishes its formula, worked example and assumptions so you can verify the result yourself.
Frequently asked questions
Does Base64 encoding run in my browser?
Yes. Every developer tool runs entirely client-side. Your strings, JSON and data never leave your device.
Which hash algorithms are supported?
Hashing uses the Web Crypto API with SHA-1, SHA-256 and SHA-512, depending on the tool, and the digest is shown as a lowercase hex string.
Is the JSON formatter safe for large files?
The formatter handles typical API responses comfortably. For very large documents, consider running it in a terminal instead of a browser tab.