MetoolzyFree Online Tools
Popular
Image Tools
Image Compressor
Compress JPG, PNG, WebP images.
Image Resizer
Resize and crop images.
Format Converter
Convert between JPG, PNG, WebP, AVIF.
Barcode Generator
Generate barcodes in Code128, EAN, UPC and more.
Image to Base64
Convert images to Base64 strings and Base64 to images. Client-side only.
Image Color Picker
Upload an image and pick colors by clicking. Auto-extract dominant color palette.
SVG Optimizer
Optimize SVG files by removing unnecessary metadata, comments, and simplifying markup.
Text & Code
JSON Formatter
Format, validate and minify JSON data.
JSON Visualizer
Visualize JSON as an interactive tree with search and path copy.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings. Client-side only — no data sent to server.
Markdown Viewer
Write and preview Markdown in real-time.
Markdown to HTML
Convert Markdown to HTML with live preview.
HTML to Markdown
Convert HTML code to clean Markdown syntax.
Lorem Ipsum Generator
Generate placeholder text for your designs and mockups.
Password Generator
Create strong, secure passwords instantly. No data stored.
Case Converter
Transform text between different cases instantly.
Word Counter
Count words, characters, sentences, paragraphs and estimate reading time.
Slugify
Convert text to clean, URL-friendly slugs. Handles Vietnamese diacritics.
URL Encoder / Decoder
Encode or decode URL components and full URIs. Client-side only.
HTML Formatter
Beautify and minify HTML code instantly.
CSS Formatter
Beautify and minify CSS code instantly.
JavaScript Formatter
Beautify and minify JavaScript code instantly.
SQL Formatter
Format and beautify SQL queries with keyword uppercasing.
Text Diff
Compare two pieces of text and see the differences highlighted.
Lorem Ipsum Tiếng Việt
Tạo văn bản mẫu tiếng Việt cho thiết kế và phát triển web.
XML Formatter
Beautify, minify and validate XML data.
HTML Entity Encoder / Decoder
Encode text to HTML entities or decode them back. Client-side only.
Text Line Tools
Sort, deduplicate, reverse, trim, shuffle and number text lines.
Morse Code Translator
Translate between text and Morse code with audio playback.
Markdown Table Generator
Create Markdown tables visually with alignment control.
Developer Tools
JWT Decoder
Decode and inspect JSON Web Tokens. Does NOT verify signatures.
UUID Generator
Generate UUID v4 identifiers using crypto.randomUUID.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Regex Tester
Test and debug regular expressions with live match highlighting.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes.
Cron Expression Parser
Parse cron expressions with human-readable descriptions.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal.
Code Playground
Write HTML, CSS and JavaScript with live preview. Powered by Monaco Editor (VS Code).
Algorithm Visualizer
Visualize sorting, graph, tree algorithms and data structures step by step.
Big O Cheat Sheet
Interactive time and space complexity reference for algorithms and data structures.
Code Snippet Manager
Save, organize, and share code snippets with syntax highlighting.
.gitignore Generator
Generate .gitignore files for any project type or framework.
README Generator
Build professional GitHub README.md files with a visual editor.
Converters
PDF Tools
PDF Merge
Combine multiple PDF files into one document. All processing happens in your browser.
PDF Split
Extract specific pages or split a PDF. All processing happens in your browser.
Images to PDF
Convert multiple images into a single PDF document. All processing in your browser.
PDF to Images
Convert each page of a PDF to high-quality PNG images. All processing in your browser.
Design & Color
Color Palette
Generate harmonious color palettes.
Gradient Generator
Create CSS gradients visually.
Contrast Checker
Check WCAG color contrast ratios.
Color Converter
Convert colors between HEX, RGB, HSL and CMYK formats.
CSS Unit Converter
Convert between CSS units: px, rem, em, %, pt, vw.
Box Shadow Generator
Design CSS box-shadow visually with live preview and code output.
SEO & Web
Meta Tag Generator
Generate OG and Twitter meta tags.
Favicon Generator
Create favicons from any image.
robots.txt Generator
Build robots.txt for your site.
Sitemap Generator
Generate XML sitemaps from URLs.
JSON-LD Checker
Validate JSON-LD structured data for SEO. Check schema.org compliance and Google Rich Results.
Open Graph Preview
Preview how your link appears when shared on Facebook, Twitter, and LinkedIn.
Why Metoolzy?
65+ free online tools built for developers, designers, and content creators.
100% Client-side
Your files and data never leave your browser. No uploads, no server processing, no tracking.
Instant & Free
No signup, no limits, no ads. Every tool loads instantly and works without an account.
6 Languages
Full interface in English, Vietnamese, Japanese, Indonesian, Chinese, and Thai.
Developer First
Monaco Editor, JSON-LD validation, regex testing, code formatters, and more for devs.
About Metoolzy Tools
Metoolzy is a comprehensive collection of 65+ free online tools designed for everyday productivity. From image compression and PDF manipulation to code formatting, barcode generation, and color design — every tool runs entirely in your browser with zero data uploaded to external servers. Our tools support batch processing, multiple export formats (PNG, SVG, PDF, ZIP), and are fully translated into 6 languages. Whether you are a developer debugging JSON, a designer picking colors, or a marketer generating QR codes and shortened links — Metoolzy has you covered. All tools are free, require no signup, and are optimized for both desktop and mobile devices.