Free Online Tools & Calculators
Fast, simple, and accurate tools for everyday calculations, PDF editing, image processing, text tools, and developer utilities.
Most Popular Tools
Explore Categories
Free online tools organized by domain
Calculators
Financial, health, GPA, date, and math calculations.
PDF Tools
Merge, split, compress, sign, and convert PDF documents.
Image Tools
Compress, resize, convert formats, and optimize images.
Text Tools
Word counter, diff checker, case converter, and text utilities.
Converters
Unit converters for length, weight, speed, and time zones.
Developer Tools
JSON formatter, base64, hash, UUID generator, and formatters.
SEO Tools
Meta tag analyzer, sitemap generator, and robots.txt builder.
Generators
QR code generator, password generator, and schema tools.
Featured Tools
Everyday online utilities designed for fast results
Merge PDF
Combine multiple PDF files into one document instantly. No file uploads required.
Image Compressor
Reduce image file size without losing visible quality. Batch process up to 50 images.
JSON Formatter
Beautify, validate, and format JSON data with syntax highlighting and error detection.
Password Generator
Generate strong, random, secure passwords with custom length and character options.
QR Code Generator
Create QR codes for URLs, text, or contact info. Batch generate up to 100 QR codes.
Word Counter
Count words, characters, sentences, paragraphs and estimate reading time instantly.
Why Use Numvax Tools?
Numvax provides simple, private, client-side online tools with instant results, step-by-step formulas, and clean mobile responsiveness.