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Developer Tools — Free Online Tools

38 free developer tools — format, encode, hash and generate. No signup, no payment, no watermark.

All Developer Tools (38)

• JWT Decoder
  Decode and inspect JWT header, payload and claims.
• JWT Encoder
  Create and sign HS256/384/512 JWT tokens in-browser.
• HMAC Generator
  Generate HMAC-SHA1/256/512 and MD5 signatures.
• AES Text Encryptor
  Encrypt and decrypt text with AES-256-GCM passwords.
• TOTP 2FA Code Generator
  Generate time-based 2FA one-time codes from a secret.
• Content Security Policy Generator
  Build a secure Content-Security-Policy header.
• Base32 Encoder & Decoder
  Encode and decode text with RFC 4648 Base32.
• Credit Card Validator
  Validate card numbers with the Luhn algorithm.
• JSON Formatter
  Format, beautify and minify JSON.
• JSON Validator
  Validate JSON and pinpoint syntax errors.
• HTML Formatter
  Beautify or minify HTML markup.
• CSS Minifier
  Minify CSS and strip comments.
• JavaScript Minifier
  Minify JavaScript and remove comments.
• Base64 Encoder / Decoder
  Encode and decode Base64 text and files.
• Hash Generator
  Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
• UUID Generator
  Generate UUID v1 and v4 identifiers in bulk.
• Password Generator
  Create strong random passwords with options.
• URL Encoder / Decoder
  Encode and decode URLs and components.
• Password Strength Checker
  Test password strength with a live meter and tips.
• HTML Minifier
  Minify HTML to reduce file size instantly.
• Markdown to HTML
  Convert Markdown into clean HTML with live output.
• YAML to JSON
  Convert YAML into formatted JSON instantly.
• XML to JSON
  Convert XML documents into structured JSON.
• JSON Minifier
  Minify JSON by removing all whitespace.
• CSS Formatter
  Beautify and indent minified CSS.
• Regex Tester
  Test regular expressions against sample text with live matches.
• CSV to JSON
  Convert CSV data into a structured JSON array.
• JSON to CSV
  Convert a JSON array of objects into CSV.
• YAML Validator
  Validate YAML and convert it to JSON.
• JSON to XML
  Convert JSON data into XML markup.
• Unix Timestamp Converter
  Convert Unix timestamps to dates and back.
• SQL Formatter
  Beautify and indent SQL queries.
• XML Formatter
  Pretty-print and indent XML documents.
• Cron Expression Generator
  Build cron schedule expressions field by field.
• CSS Gradient Generator
  Create linear CSS gradients with a live preview.
• CSS Box Shadow Generator
  Design CSS box shadows visually and copy the code.
• CSS Border Radius Generator
  Generate custom border-radius CSS with a preview.
• Text to ASCII Code
  Convert text into ASCII character codes.

Explore other categories

• QR Code Tools
  Generate customizable QR codes
• PDF Tools
  Convert and combine documents
• Image Tools
  Compress, resize and convert
• Text Tools
  Analyze and transform text
• SEO Tools
  Generate meta, schema and sitemaps
• Calculators
  Calculate and convert units
• Converters
  Convert temperature and colors
• Password Tools
  Generate, hash and validate passwords
• Security Tools
  Encrypt, generate keys and validate securely
• Website Tools
  DNS, IP and WHOIS lookups
• File Tools
  Inspect, encrypt and secure files
• Video Tools
  Inspect video and extract frames
• Audio Tools
  Speech, voice and audio metadata