Developer & Data Tools
Encode, decode, validate, hash and transform local text, CSV, JSON and XML.
Tools in this collection
JSON FormatterParse supplied JSON and output readable indentation.Use tool →JSON ValidatorValidate JSON syntax and show the parser error when malformed.Use tool →JSON to CSV ConverterConvert a JSON array of flat objects into CSV output.Use tool →CSV to JSON ConverterConvert a CSV table into JSON objects using header names.Use tool →JSON Object FlattenerFlatten nested JSON objects into dotted paths.Use tool →XML Pretty PrinterIndent an XML document using a non-networked parser.Use tool →XML Syntax ValidatorCheck XML parsing errors without resolving external entities.Use tool →Base64 EncoderEncode pasted text to standard Base64 locally on the server.Use tool →Base64 DecoderDecode well-formed Base64 strings; invalid input is rejected.Use tool →URL Percent EncoderEncode a full text value using RFC3986 percent-encoding.Use tool →URL Percent DecoderDecode URL percent-encoding to human-readable text.Use tool →HTML Entity EncoderEncode HTML-sensitive characters into safe entities.Use tool →HTML Entity DecoderDecode named and numeric HTML entities in your input.Use tool →SHA-256 Hash GeneratorCalculate the SHA-256 digest of supplied input bytes.Use tool →SHA-512 Hash GeneratorCalculate the SHA-512 digest of supplied input bytes.Use tool →UUID v4 GeneratorGenerate cryptographically randomized standard UUID v4 values.Use tool →Secure Password GeneratorGenerate a random password using cryptographic randomness.Use tool →Password Strength HeuristicsInspect password length and character variation without sending it to third parties.Use tool →JWT Payload DecoderDecode a JWT header and payload without claiming signature verification.Use tool →Regular Expression TesterTry a bounded user-supplied PCRE pattern against provided test text.Use tool →Cron Expression Syntax CheckerCheck five-field cron syntax without promising all vendor-specific semantics.Use tool →Secure Random TokenGenerate URL-safe random tokens with cryptographic random_bytes.Use tool →HTML Whitespace CompressorConservatively remove spaces between HTML tags; test scripts and preformatted text afterward.Use tool →CSS Comment and Whitespace CleanerConservatively remove CSS comments and redundant whitespace; not a full optimizer.Use tool →
How to choose a tool
Start with the task you can validate from real public responses or source data. Use the relevant primary evidence and then compare related checks. These tools do not invent live keyword rankings, backlink counts, AI citations, or search volume.