Free Developer Tools — JSON Formatter, Base64, Hash & Regex Utilities

Available In-Browser Tools (13)

• JSON Formatter & Validator

  Format, beautify, minify, and validate JSON data with syntax error detection.

• URL Encode & Decode

  Encode and decode URLs, query parameters, and special characters safely.

• Base64 Encode & Decode

  Encode and decode UTF-8 text strings to and from Base64 representations.

• HTML Entity Encoder & Decoder

  Escape and unescape HTML special characters like <, >, &, and quotes.

• JWT Token Decoder

  Decode JSON Web Token headers and payloads with expiration status.

• Unix Timestamp Converter

  Convert Unix epoch timestamps to human dates and format dates to epoch seconds.

• Hash Generator (Web Crypto)

  Compute SHA-256, SHA-384, SHA-512, and SHA-1 cryptographic hashes.

• Regex Tester & Debugger

  Test regular expressions in real time with interactive flags and match highlights.

• CSS Gradient Generator

  Design smooth linear and radial CSS gradients with visual previews and copyable CSS.

• CSS Box Shadow Generator

  Create layered CSS box shadows with interactive blur, spread, and inset controls.

• HTML Meta Tag Generator

  Generate SEO title, description, Open Graph, and Twitter Card HTML meta tags.

• Robots.txt Generator

  Build customized robots.txt files with crawler directives and sitemap links.

• Unix Epoch Converter

  Convert between Unix timestamps (seconds & milliseconds) and human-readable dates.