Free Online Converters: Currencies, Units & Formats
Access our complete collection of free online converters for all your daily conversions: currencies with real-time exchange rates, measurement units (length, weight, volume, temperature), and file formats. Instant bidirectional conversion without registration.
Why Use Our Online Converters?
Online converters save you from manually searching for exchange rates, conversion formulas or multiplication factors. Our collection of free 2026 converters covers all daily professional and personal conversion needs.
Real-Time Currency Converter
Our currency converter supports over 150 world currencies with exchange rates automatically updated every hour via the European Central Bank (ECB) API. Instantly convert: EUR to USD, USD to EUR, GBP to EUR, CHF to EUR, and all possible pairs. Perfect for international travel, online shopping abroad, money transfers, or forex market tracking. The converter displays the real interbank rate (mid-market rate) without commercial margin.
Measurement Unit Converters
Our unit converters cover all physical quantities: length (meters, kilometers, miles, inches, feet), mass/weight (kilograms, pounds, ounces, tons), volume (liters, gallons, milliliters), temperature (Celsius, Fahrenheit, Kelvin), area (m², hectares, acres), speed (km/h, mph, m/s), pressure (bar, psi, pascal). Instant bidirectional conversion with exact mathematical formulas. Ideal for DIY, cooking, USA/UK travel, scientific work.
PDF File Converter
Our online PDF converter converts your documents to and from PDF format: Word to PDF (DOCX → PDF), Excel to PDF (XLSX → PDF), Image to PDF (JPG, PNG → PDF), PDF to Word (editing), PDF to Excel (table extraction), PDF to Image. 100% browser processing, your files remain private. Free version limited to 3 conversions/day, unlimited PRO version at $9.90/month.
Conversion Accuracy and Reliability
All our converters use official conversion formulas and internationally standardized conversion factors. For example: 1 inch = 2.54 cm exactly (international definition), 1 pound = 0.45359237 kg precise, temperatures according to formulas °F = (°C × 9/5) + 32. Exchange rates come from official sources (ECB, central banks) and are continuously refreshed. You get reliable results for your professional calculations.
Security and Privacy
Our secure converters work with local processing (client-side) in your browser. The amounts you convert (currencies, dimensions, quantities) are NEVER transmitted to our servers. Exception: PDF converter temporarily uploads files for server conversion, then automatically deletes them after processing (maximum 1-hour retention). GDPR compliance guaranteed.
Frequently Asked Questions
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