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Curated for developers

Built for developers — fast, private, no signup.

JSON, regex, hashes, JWT, Base64, timestamps, UUIDs and the rest of the tools you reach for between commits — all running in your browser, no upload required.

Why this set

These are the converters and inspectors that show up in every code review and bug hunt: pretty-print a payload, decode a token, generate an ID, hash a string. Each tool runs entirely in your browser using native Web APIs (crypto.subtle, JSON.parse, the regex engine), so production payloads never leave your machine — safe to use on customer data without thinking twice.

Data & code

Encoding & crypto

Identifiers & utilities