Developer Utilities
Base64, JSON, UUIDs, timestamps, regex, and more — all free and running in your browser
Base64/URL encoding, JSON formatting and validation, UUID and random number generation, Unix timestamp conversion, hash generation, a regex tester, and a URL parser/query string builder — all run locally in your browser with no data leaving your machine.
Learn more →Base64 / URL Encoder-Decoder
Encode or decode text as Base64 or a URL component.
JSON Formatter & Validator
Format, validate, and minify JSON with instant error messages.
UUID / Random Number Generator
Generate UUIDs or random numbers within a range.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Regex Tester
Test a regular expression against sample text with live match highlighting.
URL Parser / Query String Builder
Break a URL into its parts, or build a query string from key-value pairs.
What is it?
This collection of developer utilities covers common everyday tasks: encoding/decoding Base64 and URL components, formatting and validating JSON, generating UUIDs and random numbers, converting Unix timestamps, generating cryptographic hashes, testing regular expressions, and parsing or building URLs.
FAQs
Are these tools free to use?
Yes, every tool here is completely free, with no sign-up required.
Do these tools send my data anywhere?
No, all processing happens locally in your browser — nothing is uploaded or stored on a server.
Can I use these on my phone?
Yes, all tools are fully responsive and work well on mobile devices.