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LumoMart

A collection of free online tools to help you work more efficiently every day.

Tools

  • Text
  • Converters
  • Developer
  • Image
  • Run Code

Popular

  • Character & Word Counter
  • JSON Formatter
  • QR Code Generator
  • BMI Calculator

Other

  • Tips & Tricks

© 2026 LumoMart. All rights reserved.

All tools process data in your browser. No data is sent to any server.

All Tools

19 free online tools to help you process text, convert data, code and much more.

Text ToolsConvertersDeveloper ToolsImage & FileRun Code

Text Tools

5

Character & Word Counter

Count characters, words, sentences, and paragraphs in your text

Case Converter

Convert text to uppercase, lowercase, title case and more

Remove Vietnamese Diacritics

Remove Vietnamese accent marks and convert to plain text

Lorem Ipsum Generator

Generate placeholder Lorem Ipsum text for design mockups

Slug Generator

Convert text and Vietnamese titles into SEO-friendly URL slugs

Converters

4

Unit Converter

Convert units of length, weight, temperature and more

Time Zone Converter

Convert time between time zones around the world

BMI Calculator

Calculate your BMI and assess your body condition

Age Calculator

Calculate your exact age from your date of birth

Developer Tools

5

JSON Formatter

Format, validate, and beautify JSON data

Base64 Encode / Decode

Encode and decode Base64 strings online

URL Encode / Decode

Encode and decode URLs online

Markdown Preview

Preview and convert Markdown to HTML in real time

Color Picker

Pick colors and convert between HEX, RGB, and HSL

Image & File

4

QR Code Generator

Generate QR codes from text, URLs, or phone numbers

Image Resizer

Resize images online without installing any software

Image Compressor

Reduce image file size while preserving quality

Image Converter

Convert image formats between PNG, JPG, and WebP

Run Code

1

Online Code Runner

Write and run code online: Python, JavaScript, C++, Java, Go, Rust, PHP and 10+ more languages