Developer Tools

Decode and inspect JSON Web Tokens — view header, payload, and verify signature integrity.

Generate MD5, SHA-1, SHA-256, and other hash digests from any text or file input.

Encode and decode Base64 strings instantly — supports text, files, and URL-safe variants.

Write and test regular expressions with real-time matching, capture groups, and explanation.

Parse and validate cron expressions — see the next scheduled runs in a human-readable format.

Write Markdown and see a live-rendered preview — supports GFM, tables, and syntax highlighting.

Format, minify, and validate JSON with configurable indentation, depth stats, and error highlighting.

Compare two texts and see additions, deletions, and changes highlighted — line, word, or character level.

Look up any HTTP status code — meaning, usage, and when to use each response code.

Format, validate, and minify XML data with configurable indentation and error reporting.

Beautify and minify SQL queries with support for MySQL, PostgreSQL, T-SQL, and more.

Beautify and minify HTML, CSS, and JavaScript code instantly with configurable options.

Calculate IPv4 subnet details — network, broadcast, hosts, masks from CIDR notation.

Generate HTML meta tags, Open Graph, and Twitter Card tags with live SERP and social previews.

Compare two JSON objects and see structural differences — added, removed, and changed keys.

Generate time-based one-time passwords from Base32 secrets. Parse otpauth:// URIs with countdown timer.

See your public IP address and detailed browser, screen, and system information instantly.

Search and copy emojis. Unicode code points, HTML entities, and shortcodes included.

Minify CSS code by removing whitespace, comments, and redundant syntax for smaller file sizes.

Minify HTML by removing whitespace, comments, and optional tags to reduce page load times.

Minify JavaScript code with variable mangling, dead code removal, and compression.

Minify JSON by removing all whitespace and formatting for compact data transfer.

Format and validate YAML with configurable indentation, sorting, and error detection.

Check foreground and background color contrast against WCAG 2.1 AA and AAA accessibility standards.

Analyze text readability with Flesch-Kincaid scores, grade levels, and detailed text statistics.

Parse any URL into its components — protocol, host, port, path, query parameters, and hash.

Search and replace text with regex support, case-sensitive matching, and batch processing.

Escape and unescape strings for JSON, HTML, SQL, URL, and more formats.

Strip extra spaces, tabs, line breaks, and trailing whitespace from text.

Repeat any text or string a specified number of times with custom separators.

Remove HTML tags, fix encoding issues, normalize whitespace, and clean up text.

Apply ROT13 cipher to encode or decode text instantly.

Convert between symbolic and numeric Unix file permission formats.

Hash passwords with bcrypt and verify existing hashes online.

Create HMAC signatures using SHA-256, SHA-384, SHA-512, and more.

Validate TOML syntax and format your configuration files.

Create and format Markdown tables with a visual editor.

Evaluate JSONPath expressions against JSON data and see results instantly.

Validate JSON data against a JSON Schema definition.

Create and sign JSON Web Tokens with custom claims and algorithms.

Encode and decode text using Base32 (RFC 4648) with padding toggle and Base32Hex variant.

Parse any user agent string into browser, OS, device, and engine components.

View JSON as a collapsible tree with color-coded types, expand/collapse nodes, and search.

Write HTML, CSS, and JS in an editor and see a live preview in a sandboxed iframe.

Paste Open Graph meta tags and preview how your links appear on social media platforms.

Browse, search, and copy characters from an interactive ASCII and Unicode character table.

Browse curated regex patterns organized by category with one-click copy to clipboard.

Convert between px, rem, em, vw, vh, and % with configurable base font size.

Encrypt and decrypt text using AES-256-GCM with password-based key derivation.

Upload an image with a QR code and decode its content — supports URLs, text, and data.

Paste a regex pattern and get a plain-English explanation of what each part matches.

Generate Apache and Nginx htpasswd entries with bcrypt, SHA-1, or MD5 hashing.

Optimize and minify SVG files — reduce file size while preserving visual quality.

Test XPath expressions against XML documents and see matched nodes instantly.

Sort JSON object keys alphabetically — deep or shallow mode with instant output.

Validate .env files — find syntax errors, duplicate keys, and empty values.

Build CORS response headers for Apache, Nginx, Express, or raw HTTP configuration.

Search and browse common network ports with service names, protocols, and descriptions.

Test your typing speed with random passages — get WPM, accuracy, and error stats.

Count characters, words, sentences, and paragraphs in your text with detailed statistics.

Encode and decode Base58 strings used in Bitcoin and IPFS addresses.

Generate Data URIs from text or files for embedding in HTML and CSS.

Fix broken JSON by automatically correcting common syntax errors.

Run JavaScript code snippets instantly in a sandboxed environment.

Convert docker run commands to docker-compose.yml and back.

Decode and inspect X.509 SSL/TLS certificates.

Generate beautiful code screenshots with syntax highlighting.

Build cron expressions visually with dropdowns and live preview.

Parse, edit, sort, and validate .env files.

Parse and explain HTTP headers with security recommendations.

Interactive regex reference with syntax groups and examples.

Visual side-by-side diff of two text blocks.

Live preview Mermaid.js diagrams with SVG/PNG export.

Validate JSON data against a JSON Schema with detailed errors.