Free Online Web Tools
Free web utilities. No ads, no sign-up, everything runs in the browser.
QR Code Generator
Generate QR for URLs, text and contacts. Add your logo. Download as PNG. No sign-up.
Word Counter
Count words, characters, sentences and paragraphs in real time. Reading time and keyword density.
Password Generator
Generate secure passwords and passphrases. Real entropy, no servers, no history.
Color Converter
Convert between HEX, RGB, HSL and HSV. Shades, related colours and WCAG contrast.
Complete Calculator
Scientific, programmer and financial. Binary/hex/octal, bitwise ops, mortgages and compound interest.
Image Converter
Convert PNG, JPG, WebP, AVIF, BMP and ICO. Generate favicons with multiple resolutions. No sign-up.
Photo Editor
Filters, adjustments, crop and rotation. B&W, Sepia, Vintage and more. No sign-up.
JSON Formatter
Format, validate and minify JSON. Errors with exact line, tree view, sort keys. No sign-up.
Markdown Converter
Markdown editor with preview. Convert to Word (.docx) or import a .docx to Markdown. No sign-up.
PDF Tools
Convert images to PDF and remove pages from a PDF. Drag & drop, image fit, no sign-up.
Base64 Encoder
Encode and decode Base64 instantly. Full Unicode support, URL-safe mode. No sign-up.
URL Encoder
Encode and decode URLs with encodeURIComponent or encodeURI. Percent-encoding instantly. No sign-up.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes in real time. Integrity verification. No sign-up.
Timestamp Converter
Convert Unix timestamps to readable dates. Live current timestamp. ISO 8601, UTC, relative. No sign-up.
Video Editor
Trim, compress, convert and edit videos. Rotate, GIF, watermark, subtitles. No sign-up.
Text Case Converter
Convert text to camelCase, snake_case, kebab-case, PascalCase, UPPERCASE and more. Real time.
UUID Generator
Generate unique UUID v4 with crypto.randomUUID(). Bulk generation, history, copy. No sign-up.
Number Base Converter
Convert between binary, octal, decimal and hex in real time. All fields update simultaneously.
JWT Decoder
Decode JWT instantly. Header, payload, standard claims and expiry verification. No sign-up.
CSS Unit Converter
Convert px, rem, em, vw, vh, pt in real time. Configurable base font-size and viewport.
Diff Checker
Compare two texts and highlight line-by-line differences. Green added, red removed. Download the diff.
HTTP Status Codes
Complete reference for 60+ HTTP 1xx-5xx status codes with bilingual descriptions and real-time search.
AES Text Encryptor
Encrypt text and files with AES-256-GCM and PBKDF2. 100% in browser. Data never leaves your device.
Regex Tester
Test regular expressions in real time. Match highlighting, capture groups and quick pattern reference.
Cron Builder
Build cron expressions visually. Natural language description and next 5 executions calculated.
Metadata Analyzer
Analyze, remove and edit EXIF, GPS, IPTC and XMP metadata. Lossless for JPEG. Privacy risk indicator. No sign-up.
MACMCleaner
Windows system cleaner. Temp files, browser cache, Prefetch and Recycle Bin. 100% offline, open source.
More tools coming soon.
What are these tools?
This section brings together free web utilities developed by Miguel Ángel Colorado Marin (MACM) to simplify everyday tasks for developers, designers and anyone working in digital environments. All tools run directly in the browser, with no installation or account required.
The code for each tool is available on GitHub under the MIT licence. If you find a bug or have a suggestion, you can open an issue or contact directly through the portfolio.
Full privacy
Everything happens in your browser. No data is sent to external servers.
No sign-up
Access any tool directly without creating an account or providing an email.
Open source
Public repositories on GitHub. You can inspect, modify and reuse the code.