UtilWave

UtilWave

Online tools for developers

This hub gathers tools for debugging, converting, encoding and validating small pieces of data during development.

22 tools

Developer

JSON FormatterFormat, validate and minify JSON online. Spot syntax errors and adjust indentation. Free and right in your browser.UUID GeneratorGenerate universally unique identifiers (UUID v4 / GUID) in bulk. Free, instant and securely generated in your browser.Base64 Encode/DecodeEncode and decode text to and from Base64 with full UTF-8 support. Free, fast and right in your browser.Hash GeneratorGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text. Free, instant and processed in your browser.URL Encode/DecodeEncode and decode URLs (percent-encoding) with accent support. Free and right in your browser.Unix Timestamp ConverterConvert Unix timestamp (epoch) to readable date and time in local, UTC and ISO. Free and instant.Text to BinaryConvert text to binary code and binary back to text (UTF-8). Free and in real time.JWT DecoderDecode JWT tokens and view the header and payload as JSON, with expiration check. All in the browser.HTML EntitiesEncode special characters into HTML entities (< & etc.) and decode them back. Free and in the browser.Slug GeneratorTurn titles into URL-friendly slugs: no accents, no symbols, hyphen-separated. Free.Regex TesterTest regular expressions (regex) in real time: see highlighted matches and captured groups. Free.JSON ↔ CSV ConverterConvert JSON to CSV and CSV to JSON both ways. Free and right in your browser.Cron GeneratorBuild cron expressions with fields and ready presets, and see the schedule description. Free.XML FormatterFormat (indent), minify and validate XML online. Free and right in your browser.JSON to TypeScriptPaste JSON and generate the matching TypeScript interfaces automatically. Free.Speed TestMeasure download, upload, latency, jitter and bufferbloat with Cloudflare's official speed test engine. Free.My IPSee your public IP address, city, country, ASN and internet provider in a quick lookup. Free.YAML JSON ConverterConvert between YAML and JSON both ways, with validation and formatting. Free and in your browser.SQL FormatterFormat and indent SQL queries for several dialects (MySQL, PostgreSQL, SQLite and more). Free and in your browser.Markdown PreviewWrite Markdown and see the rendered result in real time. Copy the generated HTML. Free and in your browser.Minify CSSShrink your CSS by removing whitespace and comments, with savings stats. Free and in your browser.Minify JavaScriptMinify your JavaScript with Terser, with size savings stats. Free and in your browser.

Common workflows

  • Generate UUIDs and hashes for tests.
  • Encode and decode data with Base64 or URL encoding.
  • Inspect JWT payloads and test regular expressions.

Good practice

Use test data whenever possible. For real tokens, passwords or keys, prefer internal and controlled environments.