Developer tools that respect your privacy
Everything runs locally in your browser. No sign-up, no uploads, no tracking of your data.
Popular tools
JSON Formatter
Format and beautify JSON with proper indentation, instantly in your browser.
JSONJSON Validator
Validate JSON syntax and get precise error messages with line and column.
EncodingBase64 Encoder
Encode text to Base64, including full Unicode support.
GeneratorsUUID Generator
Generate random v4 UUIDs, one or many, with one click.
TestingRegex Tester
Test regular expressions live: matches highlighted, counted and listed.
CryptoJWT Decoder
Decode JWT header and payload locally. Signature is shown but never verified here.
FormattersJavaScript Formatter
Format and beautify JavaScript code with Prettier, in your browser.
GeneratorsCron Expression Generator
Build cron expressions visually and read them in plain English.
All tools
JSON
JSON Formatter
Format and beautify JSON with proper indentation, instantly in your browser.
JSONJSON Validator
Validate JSON syntax and get precise error messages with line and column.
JSONJSON Minifier
Compress JSON by removing whitespace. Ideal before sending payloads or storing data.
Encoding
Base64 Encoder
Encode text to Base64, including full Unicode support.
EncodingBase64 Decoder
Decode Base64 back to readable text with UTF-8 support.
EncodingURL Encoder
Percent-encode text so it is safe to use inside URLs and query strings.
EncodingURL Decoder
Decode percent-encoded URL text back to readable characters.
Generators
UUID Generator
Generate random v4 UUIDs, one or many, with one click.
GeneratorsCron Expression Generator
Build cron expressions visually and read them in plain English.
GeneratorsLorem Ipsum Generator
Generate lorem ipsum placeholder text, by paragraph count.
Crypto
Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text.
CryptoJWT Decoder
Decode JWT header and payload locally. Signature is shown but never verified here.
Testing
Time
Formatters
JavaScript Formatter
Format and beautify JavaScript code with Prettier, in your browser.
FormattersCSS Formatter
Format and beautify CSS with Prettier, locally in your browser.
FormattersHTML Formatter
Format and beautify HTML markup with Prettier, locally in your browser.
FormattersSQL Formatter
Format SQL queries with proper indentation and keyword casing.