[ 21 tools · 100% client-side ]
Developer tools, right in your browser
Format JSON, decode JWTs, generate hashes, test regex and calculate subnets without installing anything. Your data never leaves your machine.
Data & Encoders
Format, validate and convert data and text.
- JSON FormatterFormat, validate, minify and browse JSON as a tree.
- Base64 Encoder/DecoderEncode and decode text and files as Base64 and Data URLs.
- URL Encoder/DecoderURL encode/decode and query string parser.
- JWT DecoderDecode JWT header, payload and expiration.
- CSV ↔ JSONConvert CSV to JSON and JSON to CSV.
- Case ConvertercamelCase, snake_case, kebab-case, PascalCase and more.
Crypto & Security
Hashes, signatures, passwords and unique identifiers.
Web & Network
Cron, regex, HTTP, user agents and subnets.
- Cron ExpressionBuild, explain and preview cron schedules.
- Regex TesterTest regular expressions with group highlighting.
- HTTP Status CodesQuick reference for HTTP status codes 1xx to 5xx.
- User-Agent ParserIdentify browser, OS, engine and device.
- What Is My IPSee your public IP, ISP, ASN and approximate location.
- Port CheckerCheck whether a TCP port is open on an IP or domain.
- Subnet CalculatorCalculate IPv4 subnets, masks and CIDR ranges.
Code Generators
Formatters, converters and command builders.