Free Developer Tools
Fast, private, no sign-up required. Every tool runs entirely in your browser - no data is sent to any server.
JSON Formatter & Validator
Format, validate, and minify JSON with syntax error detection. Supports 2-space and 4-space indentation.
Password Generator
Generate strong, random passwords with customizable length and character options. Uses Web Crypto API.
Meta Tag Generator
Generate SEO meta tags with live Google and social media previews. Open Graph and Twitter Cards included.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text. Full UTF-8 support for international characters.
Word & Character Counter
Count words, characters, sentences, paragraphs, and reading time. Includes case conversion tools.
llms.txt Generator & Validator
Create and validate llms.txt files. Check format compliance, detect issues, and help AI models understand your site.
Regex Tester
Test regular expressions with live highlighting, match details, replace mode, and a quick reference cheat sheet.
JWT Decoder
Decode JSON Web Tokens instantly. View header, payload, signature, expiration status, and registered claims.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes using the Web Crypto API. Compare and verify hashes.
UUID Generator
Generate UUID v4 (random) and v1-like (time-based) identifiers. Bulk generation and UUID validation included.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds.
URL Encoder & Decoder
Encode or decode URLs with component and full URI modes. Includes a URL parser to break down any URL.
Diff Checker
Compare two texts side by side with line-by-line diff. See additions, deletions, and unchanged lines.
Open Graph Preview
Preview how your links appear on Google, Facebook, LinkedIn, and Twitter/X. Generate Open Graph and Twitter Card meta tags.
robots.txt Generator
Build robots.txt files visually with user-agent groups, allow/disallow rules, sitemaps, and crawl delays.
Schema Markup Generator
Generate JSON-LD structured data for Article, FAQ, HowTo, Product, LocalBusiness, Breadcrumb, and more.
Slug Generator
Convert any text into a clean, URL-friendly slug. Handles accented characters, special symbols, and unicode.
CSS Gradient Generator
Create beautiful linear and radial CSS gradients with multiple color stops, angle controls, and presets.
Color Converter
Convert colors between HEX, RGB, and HSL formats. Visual color picker with sliders and live preview.
Box Shadow Generator
Build CSS box-shadow effects visually. Stack multiple layers, adjust blur, spread, color, and opacity.
AI Content Detector
Detect AI-generated text using 8 linguistic signals. Check if content was written by ChatGPT, Claude, or other AI models.
Plagiarism Checker
Check text uniqueness and compare documents for plagiarism. Uses n-gram analysis, cosine similarity, and sentence matching.
Live HTML Editor
Write HTML, CSS, and JavaScript with instant live preview. 7 templates, split layouts, mobile preview, and fullscreen mode.
HTML Tag Generator & Remover
Add HTML tags to plain text or strip all tags from HTML. Supports paragraphs, headings, lists, links, bold, and custom tags.
Plagiarism Remover & AI Humanizer
Rewrite text to remove plagiarism and humanize AI-generated content. Replaces AI phrases, swaps synonyms, and adds contractions.
Code Formatter & Beautifier
Format, beautify, and minify code instantly. Supports JSON, HTML, CSS, JavaScript, SQL, and XML.