Security toolkit online

JWT Security Lab

54 independent crypto, encoding, data, and developer tools — each with its own API.

JWT

JWT EncoderEncode and sign JWTs (HS256/HS384/HS512/RS256) with custom claims.JWT DecoderDecode JWT header and payload without requiring a secret.JWT ValidatorValidate signature, expiry, nbf, iss, aud, and algorithm.JWT GeneratorGenerate production-ready JWTs with TTL, roles, and standard claims.

Encoding

Base64 Encode/DecodeEncode or decode Base64 / Base64URL with UTF-8 safety.URL Encode/DecodePercent-encode or decode URLs and query strings.HTML Encode/DecodeEscape or unescape HTML entities safely.

Hashing

MD5 GeneratorGenerate MD5 digests (hex / base64).SHA-1 GeneratorGenerate SHA-1 digests.SHA-256 GeneratorGenerate SHA-256 digests.SHA-512 GeneratorGenerate SHA-512 digests.BCrypt Password GeneratorHash passwords with bcrypt (configurable cost).BCrypt Verify PasswordVerify a plaintext password against a bcrypt hash.HMAC GeneratorCreate HMAC signatures (SHA-256/512).

Generators

UUID/GUID GeneratorGenerate UUID v1/v4 (and nil) in multiple formats.Random String GeneratorCryptographically strong random strings.Password GeneratorGenerate strong passwords with entropy estimate.

JSON / XML / YAML / CSV

JSON FormatterPretty-print JSON with configurable indent.JSON ValidatorValidate JSON and report precise parse errors.JSON MinifierMinify JSON by removing whitespace.JSON to XMLConvert JSON documents to XML.XML to JSONConvert XML documents to JSON.XML FormatterPretty-print XML.XML ValidatorValidate XML well-formedness.YAML to JSONConvert YAML to JSON.JSON to YAMLConvert JSON to YAML.CSV to JSONConvert CSV tables to JSON arrays.JSON to CSVConvert JSON arrays to CSV.

Images

Image to Base64Convert uploaded images to Base64 data URIs.Base64 to ImageDecode Base64 into an image preview payload.

Numbers & ASCII

Binary to DecimalConvert binary numbers to decimal.Decimal to BinaryConvert decimal numbers to binary.Decimal to HexConvert decimal numbers to hexadecimal.Hex to DecimalConvert hexadecimal to decimal.ASCII ConverterConvert text ↔ ASCII code points.ASCII ↔ HEXConvert ASCII text ↔ hexadecimal bytes.ASCII ↔ BinaryConvert ASCII text ↔ binary bytes.

Time & Cron

Unix Timestamp ConverterConvert between Unix timestamps and ISO dates.Epoch ConverterRich epoch conversion with timezone offsets.Cron Expression GeneratorBuild cron expressions from human-friendly fields.Cron Expression ParserExplain cron expressions in plain English.Unix Time to DateMap Unix time to local/UTC formatted dates.Date Difference CalculatorCompute precise differences between two dates.

Dev Tools

Color PickerInspect colors across HEX, RGB, HSL with contrast hints.HEX ↔ RGB ConverterConvert between HEX and RGB(A).HEX ↔ HSL ConverterConvert between HEX and HSL(A).CSS MinifierMinify CSS safely.CSS BeautifierBeautify CSS with consistent indentation.JavaScript MinifierLightweight JS minifier for snippets.JavaScript BeautifierBeautify JavaScript snippets.HTML MinifierMinify HTML markup.HTML BeautifierBeautify HTML markup.SQL FormatterFormat SQL for readability.SQL BeautifierBeautify SQL with keyword casing.