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.
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.