18 working tools
Developer tools
Format, encode, inspect and debug code and web data.
- Encode and decode common formats
- Inspect tokens, queries and timestamps
- Format and compare code-related text
18browser-based toolsNo account required
Base64 EncoderEncode UTF-8 text as Base64.Base64 DecoderDecode Base64 into readable UTF-8 text.URL EncoderPercent-encode text for use in a URL.URL DecoderDecode percent-encoded URL text.HTML EncoderEscape HTML special characters safely.HTML DecoderConvert HTML entities back into text.HTML MinifierRemove unnecessary whitespace from HTML.CSS MinifierReduce CSS whitespace and comments.JavaScript MinifierSafely reduce common JavaScript whitespace.SQL FormatterFormat common SQL statements for readability.Regex TesterTest a regular expression and inspect every match.JWT DecoderInspect JWT header and payload data without sending it away.Unix Timestamp ConverterConvert Unix timestamps to ISO dates and back.Query String ParserConvert URL query parameters into structured JSON.Query String BuilderBuild a URL query string from JSON data.Text Diff CheckerCompare two texts line by line.Cron Expression ExplainerExplain the five parts of a standard cron expression.UUID ValidatorCheck whether a value is a valid UUID and identify its version.
About this collection
Practical developer tools, without the clutter.
Development work is full of tiny transformations: decoding a value from a log, checking a token, formatting a query or turning parameters into JSON. Opening a large application for each one breaks concentration.
These focused utilities keep those jobs close at hand. Inputs are handled in the browser, results are easy to copy, and each page explains what the tool does—and what it does not verify.
Worth checking: Decoded data is not automatically trusted data. Validate signatures, origins and permissions in the system that will actually use the result.