Developer Tools
JSON, Base64, encoders, formatters and more
Developer tools for coding and debugging. Format JSON, encode/decode Base64 and URLs, generate UUIDs, test regex patterns, decode JWT tokens, and more. Essential tools for web developers and programmers.
43 tools available
JSON Formatter
Format, validate, and minify JSON data online. Syntax highlighting, error detection, and tree view.
Base64 Encoder / Decoder
Encode and decode Base64 strings online. Also supports file to Base64 encoding for data URIs.
URL Encoder / Decoder
Encode and decode URLs and query strings. Escape special characters for safe URL usage.
HTML Formatter
Format and beautify HTML code online. Indent, clean, and minify HTML instantly.
CSS Minifier
Minify and compress CSS code online. Remove comments, whitespace, and redundancy for faster load.
JavaScript Minifier
Minify JavaScript code online. Remove whitespace and comments to reduce bundle size.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text or files. Browser-based, private.
Regex Tester
Test and debug regular expressions online. Highlight matches, test flags, and view capture groups.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature without verification.
UUID Generator
Generate random UUIDs (v4) and NIL UUIDs. Generate up to 100 UUIDs at once.
Color Code Converter
Convert color codes between HEX, RGB, HSL, HSV, CMYK and named CSS colors. Live color preview.
HTML Encoder / Decoder
Encode and decode HTML entities online.
CSS Formatter / Beautifier
Format and beautify CSS code online.
Markdown to HTML
Convert Markdown text to HTML with live preview.
HTML to Markdown
Convert HTML code to clean Markdown text.
CSS Gradient Generator
Generate linear and radial CSS gradients visually.
Box Shadow Generator
Generate CSS box-shadow with live visual preview.
Border Radius Generator
Generate CSS border-radius visually.
Flexbox Generator
Generate CSS Flexbox layout code visually.
CSS Grid Generator
Generate CSS Grid layout code visually.
Meta Tag Generator
Generate HTML meta tags for SEO and social media.
Open Graph Preview
Preview how your page looks when shared on Facebook.
Twitter Card Preview
Preview how your page looks when shared on Twitter/X.
Robots.txt Generator
Generate a robots.txt file with a visual builder.
.htaccess Generator
Generate Apache .htaccess rules for redirects and security.
chmod Calculator
Calculate Unix file permissions in octal notation.
Cron Expression Parser
Parse cron expressions with plain English explanations.
HTTP Status Codes
Reference guide for all HTTP status codes.
MIME Type Checker
Look up MIME types by file extension.
IP Address Validator
Validate IPv4 and IPv6 addresses and get network info.
User Agent Parser
Parse any browser user agent string.
JSON to CSV Converter
Convert JSON data to CSV format online for free. Download as spreadsheet.
CSV to JSON Converter
Convert CSV files to JSON format online for free.
JSON to XML Converter
Convert JSON data to XML format online for free.
XML to JSON Converter
Convert XML data to JSON format online for free.
CSV to Excel Converter
Convert CSV files to Excel (XLSX) format online for free.
Excel to CSV Converter
Convert Excel (XLSX, XLS) files to CSV format online for free.
YAML to JSON Converter
Convert YAML data to JSON format online for free.
JSON to YAML Converter
Convert JSON data to YAML format online for free.
Text to Binary Converter
Convert text to binary code online for free.
Text to Hex Converter
Convert text to hexadecimal code online for free.
Archive Converter
Convert between ZIP, RAR, 7Z and other archive formats online for free.
Ebook Converter
Convert between EPUB, MOBI, PDF and other ebook formats online for free.