Developer & Security Tools
JSON formatter, Base64 and URL encoders, hash, UUID and password generators, JWT decoder, regex tester and cron generator. Values you enter are not sent to a server.
17 tools in this category
- Base64 Encoder/DecoderEncode text or files to Base64 or a data URL, and decode Base64 back to text, an image preview or a file. URL-safe supported.
- URL Encoder/DecoderPercent-encode or decode text and URLs with component, whole-URL or form (+) style, and break a URL down into its parts and query values.
- JSON FormatterFormat or minify JSON, pinpoint errors by line and column, auto-fix almost-JSON, and view it as a tree or CSV.
- UUID GeneratorGenerate up to 1000 UUID v4, v7 or ULID values at once, and inspect a UUID's version and creation time.
- Password GeneratorCreate strong random passwords by length and character type, plus easy-to-read passwords, batches and an estimated cracking time.
- Timestamp ConverterConvert Unix timestamps (seconds or milliseconds, auto-detected) to dates and back, with time zones, ISO 8601, RFC 2822 and relative time.
- Hash GeneratorCreate MD5, SHA-1, SHA-256 and SHA-512 hashes (and HMAC) for text or files, and verify downloads against a checksum.
- Regex TesterHighlight where a regex matches, inspect groups and named groups, try replacements, and start from common patterns with a cheat sheet.
- Image Metadata Viewer & RemoverSee GPS location, camera, capture time and AI-generation info hidden in photos, and save copies with it removed without losing quality. Batch friendly.
- JWT Decoder & VerifierDecode JWT headers and payloads, check expiry, and verify HS, RS, PS, ES and EdDSA signatures with a secret or public key, with warnings for risky settings.
- SVG to JSXTurn SVG into a React component with attributes like class fixed for you.
- Cron GeneratorBuild a cron expression from fields or presets, with a plain-language description and the next 5 run times.
- UTM BuilderAdd UTM parameters to ad, newsletter and social links to tell campaigns apart. Build many URLs at once, with cleanup tips and CSV export.
- URL ParserBreak a URL into protocol, host, path, query and hash, edit query parameters to build a new URL, and convert internationalized domains to Punycode.
- Subnet CalculatorWork out network address, broadcast, host range and host count from an IPv4 address and CIDR or mask, split into subnets, and find the CIDR for a host count.
- Number Base ConverterConvert between binary, octal, decimal and hexadecimal, up to base 36, with exact results even for very large numbers.
- CSV ↔ JSON ConverterConvert CSV to JSON and JSON to CSV. Commas and line breaks inside quotes are handled correctly, and everything is processed in your browser.