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A fast, privacy-first collection of everyday developer utilities - encoders, generators, decoders and converters.
Generate cryptographically random v4 and time-ordered v7 UUIDs in bulk.
Create compact, URL-safe Nano IDs with a custom size and alphabet.
Encode text or files to Base64, with an optional URL-safe variant.
Decode Base64 back to readable text, including URL-safe input.
Decode a JWT to inspect its header, payload, and claims instantly.
Percent-encode text for safe use in URLs and query strings.
Decode percent-encoded URL strings back to plain, readable text.
Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes of text or files.
Generate strong, random passwords with a live strength estimate.
Convert between Unix timestamps and human-readable dates, both ways.
Generate placeholder lorem ipsum text by paragraphs, sentences, or words.
Write, preview and export PlantUML diagrams in your browser - rendered 100% locally.
Every tool in this category runs entirely inside your browser. Your data is never uploaded to a server, so you can safely work with API keys, tokens, customer records and other sensitive payloads. There is no sign-up, nothing to install, and the whole toolkit keeps working offline once loaded.