Free online tools
for your everyday
Convert PDF to Word, generate Spanish lease contracts, calculate your net salary or VAT and create QR codes. All free, no sign-up, right in your browser.
All tools
Online calculators and simulators
11Work out Spanish VAT, net salary, self-employed (autónomo) contributions, redundancy pay or rental yield, updated for 2026.
VAT Calculator Spain
Calculate Spanish VAT at 4%, 10% and 21% instantly. Add or remove VAT from any price.
TikTok Earnings Calculator
Estimate how much you can earn on TikTok from the Creator Rewards Program and sponsored posts.
Calorie Calculator
Calculate your daily calories, BMI and macros for your goal. Instantly in your browser.
Self-Employed Tax Simulator (Spain)
Calculate your Spanish autonomo quota, income tax and withholding based on annual income.
Net Salary Simulator
Find out your take-home pay from your gross annual salary.
Rental Yield Calculator
Calculate the gross and net return on a buy-to-let property investment.
Dropshipping Simulator
Calculate net profit, margin and monthly projection for your store.
Redundancy Pay Simulator
Calculate your redundancy entitlement based on dismissal type and seniority.
Currency Converter
Convert between 30+ currencies with daily ECB reference rates.
Crypto Converter
Convert Bitcoin, Ethereum and 20+ cryptocurrencies to EUR, USD and other currencies instantly.
Weight Converter
Convert between 12 units of mass: kg, lb, oz, g, tonnes, stones, carats and more. Instant results.
Contract and receipt templates
6Generate lease, loan or freelance contracts adapted to Spanish law and download them in Word or PDF.
Residential Lease Contract
LAU residential tenancy agreement with customisable clauses for deposit, CPI and utilities.
Tourist Rental Contract
Short-term tourist or holiday rental agreement with deposit, check-in times and house rules.
Commercial Lease Contract
Business premises or office lease (LAU Title III) with fit-out and IBI clauses.
Simple Freelance Contract (Spain)
Service agreement for freelancers adapted to Spanish legislation.
Private Loan Agreement
Loan contract between private individuals with customisable terms and repayment schedule.
Simple Receipt Generator
Create personalised payment receipts in seconds and download them as PDF. With or without VAT.
Online utilities
9QR code generator, strong passwords, word counter, JSON validator and other everyday utilities.
What Is My IP?
Find your public IP address, country, city and internet provider instantly.
QR Code Generator
Create free QR codes for links, WiFi networks and contacts, and download them as PNG.
AI Background Remover
Remove the background from any photo with AI, in your browser, no upload. Transparent PNG.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text in paragraphs, sentences or words. With HTML format.
Text Comparator
Compare two texts and detect differences line by line and word by word. No sign-up.
JSON Validator
Validate, format and minify JSON instantly. Detect syntax errors without sign-up.
Secure Password Generator
Create strong, random passwords with the parameters you choose.
EAN-13 Barcode Generator
Generate EAN-13 barcodes from 12 or 13 digits. Download as SVG or PNG, print-ready.
Word Counter
Count words, characters and paragraphs instantly in any text.
PDF tools and file conversion
4Convert PDF to Word and Word to PDF, merge, split or compress PDFs without uploading your files to any server.
PDF to Word
Convert your PDFs into editable .docx documents.
Word to PDF
Turn Word documents into PDF in seconds.
Merge & Split PDF
Merge several PDFs into one or extract the pages you need. In your browser.
Compress PDF
Reduce the size of a PDF without uploading the file. Choose the compression level.
No tools match your search.
Latest blog articles
See all articles →How to merge PDF files into one for free
How to combine several PDFs into one file for free: online without uploading, on Windows, with Preview on Mac and with the Files app on iPhone.
Read article →How to split a PDF: extract or separate pages for free
Split a PDF and extract exactly the pages you need — free, no watermark, no upload. How page ranges work, use cases and a private browser-based tool.
Read article →Kg to lbs: how to convert kilograms to pounds
Convert kilograms to pounds: the exact formula (kg × 2.20462), a quick table from 1 to 100 kg, the reverse lbs-to-kg conversion and common examples.
Read article →Free online tools: no sign-up, private by design
Herramientapp brings together the tools people search for most for work, paperwork and personal finances, with a focus on Spain: from a PDF to Word converter or a Spanish VAT calculator to residential lease contract templates ready to download.
Free, no sign-up
No accounts, no free trials and no usage limits. Open a tool and use it.
Your files stay on your device
The PDF, Word and image tools run inside your browser: we never upload your documents to a server.
Built for Spain
Contracts based on the Spanish LAU, net salary and self-employed simulators updated for 2026, and blog guides that cite official sources.
Frequently asked questions
Are the Herramientapp tools free?
Yes. Every tool is free, with no usage limits and no paid tiers. You don't need to create an account or leave your email.
Are my files uploaded to a server?
No. The PDF, Word and image tools process files directly in your browser, so your documents never leave your device.
Are the contracts valid in Spain?
The contract templates are drafted according to Spanish law (for example, the Urban Leases Act, LAU). They are a starting point: always review the document and, if your case is complex, consult a professional.
Are the salary, VAT and self-employed calculators up to date?
Yes. The simulators are updated for 2026 (VAT rates, the income-based self-employed contribution system and income tax brackets), and our blog guides cite the official sources they rely on, such as the BOE and the Spanish Tax Agency. Results are estimates.
Do the tools work on mobile?
Yes. All tools are optimised for phones and tablets and work in any modern browser, with nothing to install.