JSON Formatter & Validator
Validate JSON, pretty-print it or minify it for compact transport.
Paste JSON to begin.
Developer & Web Utilities
Useful browser tools for structured data and web work.
Five focused utilities for JSON, Base64, URL components, UUIDs and SHA-256. Processing happens locally in your browser and no account is required.
✓ Local browser processingBase64 Encoder & Decoder
Encode UTF-8 text as Base64 or decode Base64 back to UTF-8 text.
Choose encode or decode.
URL Component Encoder & Decoder
Encode or decode text for use inside a URL component using the browser's standard URI functions.
Enter a value to begin.
This tool uses encodeURIComponent/decodeURIComponent; it is intended for components, not for rewriting an entire already-structured URL.
UUID v4 Generator
Generate cryptographically random version-4 UUID identifiers in your browser.
Choose how many UUIDs to generate.
SHA-256 Hash Generator
Create a SHA-256 digest from text with the browser Web Crypto API.
Enter text to generate a digest.
A cryptographic hash is one-way and is not encryption. Do not treat a plain SHA-256 password hash as a complete password-storage system.
Why keep these tools local?
Developer utilities often handle snippets, identifiers, configuration values or test data. Running the transformation in the browser avoids an unnecessary round-trip to a NexusNova server and makes the behavior easier to inspect.
Important boundaries
JSON validation checks syntax, not whether the data matches a business schema. Base64 is an encoding, not encryption. SHA-256 is a cryptographic digest, but secure password storage requires a purpose-built password hashing approach with salts and appropriate work factors. UUIDs generated here are intended as random identifiers; they are not authentication secrets.
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