eTips Tools

Available Tools

Full catalog of web utilities for developers, designers, entrepreneurs and the general public.

Full catalog

Finance

VAT / IVA calculator

Calculate VAT or IVA instantly with a configurable rate. Works for any country — convert net to gross or extract tax from an inclusive price.
Finance

Margin calculator

Calculate margin, markup and selling price from cost. Understand the difference between margin-on-price and markup-on-cost to set prices correctly.
Finance

Percentage calculator

Four percentage calculators in one page: find X% of Y, what percent X is of Y, percentage change, and apply an increase or discount to any value.
Diagnostics

Screen size

Get the exact dimensions of your viewport, document and physical screen resolution. Perfect for diagnosing CSS or rendering issues on your clients' devices.
Utility

Chilean RUT generator

Generate fake RUTs for testing and development, or validate RUTs using the SII Modulo 11 algorithm. Look up public taxpayer data directly from the SII portal.
Utility

QR generator

Generate QR codes from any text or URL. Customize size, colors and error correction level. Download as PNG with no watermarks.
Utility

UTM link builder

Build UTM-tagged campaign URLs for Google Analytics. Set source, medium, campaign, term and content. Generates a QR code of the final link.
Utility

Sitemap validator

Check your XML sitemap structure: detect errors, invalid URLs, incorrect date formats and duplicates. Supports both urlset and sitemapindex.
Utility

Password generator

Generate random, secure passwords in your browser. Choose length, character types and security level. Shows entropy and estimated crack time. No data sent to the server.
Utility

URL encoder / decoder

Encode and decode text for URLs using the encodeURIComponent standard. Real-time or manual conversion, with one-click clipboard copy.
Utility

Date difference calculator

Calculate the exact number of days, weeks, months and years between two dates. Ideal for contracts, deadlines, anniversaries and project planning.
Utility

Age calculator

Find your exact age in years, months and days from your date of birth. Shows total days lived, day of the week you were born, and days until your next birthday.
Design

Color converter

Convert between HEX, RGB and HSL instantly with a visual color picker. Get the CSS-ready code in any of the three formats.
Design

px → rem / em converter

Convert pixels to rem and em with a configurable base size. Includes a quick reference table and reverse conversion for responsive design and fluid typography.
Writing

Word counter

Count words, characters, sentences and paragraphs in real time. Calculate reading time and compare against SEO, Twitter and other limits.
Raffles

Raffle wheel

Add names, decisions or any options, spin the wheel and get a completely random winner. Perfect for raffles, draws and group dynamics.