Toolium

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Tips, guides, and tutorials to help you get the most out of your tools.

3 min read

How to Merge PDFs Online for Free

Learn how to combine multiple PDF files into a single document without installing any software. Fast, free, and completely private.

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3 min read

How to Extract Pages from a PDF Online

Split a PDF into individual pages or extract a specific range. No software needed - works right in your browser.

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3 min read

How to Reduce PDF File Size for Free

Compress bloated PDFs to make them easier to share via email and faster to upload. No quality loss on text-based documents.

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4 min read

How to Compress Images Without Losing Quality

Reduce image file sizes for faster websites and smaller email attachments while keeping your photos looking great.

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3 min read

How to Resize Images Online Without Losing Quality

Resize images to exact pixel dimensions for social media, websites, or printing. Maintain aspect ratio and sharpness.

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4 min read

PNG vs JPG vs WebP: Which Image Format Should You Use?

Understand the differences between image formats and when to use each one for the best balance of quality and file size.

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3 min read

How to Convert Excel Files to CSV Format

Convert Excel spreadsheets (.xlsx, .xls) to CSV for data import, analysis, or compatibility with any application.

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3 min read

How to Convert CSV Data to Excel Spreadsheets

Turn CSV text into a formatted Excel (.xlsx) file you can open in Excel, Google Sheets, or any spreadsheet app.

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4 min read

How to Convert CSV to JSON - A Complete Guide

Everything you need to know about converting CSV data to JSON format, including handling headers, nested data, and edge cases.

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3 min read

How to Extract Text from Word Documents Online

Pull plain text or HTML from .docx files without Microsoft Office. See word count, copy to clipboard, or download.

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5 min read

Best Free Online Developer Tools in 2026

A curated list of free browser-based tools every developer needs - from JSON formatting to Base64 encoding.

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4 min read

What is Base64 Encoding and When Should You Use It?

A practical explanation of Base64 encoding - what it is, why it exists, and common use cases for developers.

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3 min read

URL Encoding Explained: When and Why to Encode URLs

Understand percent-encoding, reserved characters, and how to properly encode URLs for web applications and APIs.

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4 min read

camelCase vs snake_case: A Developer's Guide to Naming Conventions

Understand the different naming conventions used in programming and when to use each one in your projects.

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3 min read

Why Word Count Matters: A Guide for Writers and Students

How to use word count effectively for essays, blog posts, and professional writing. Plus tips for hitting your target.

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4 min read

How to Create Strong Passwords That Are Actually Secure

Learn what makes a password truly strong and how to generate passwords that protect your accounts from attacks.

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3 min read

Color Codes Explained: HEX, RGB, and HSL

Understand the differences between HEX, RGB, and HSL color formats and when to use each one in your projects.

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3 min read

The History and Purpose of Lorem Ipsum Placeholder Text

Why designers have used Lorem Ipsum for over 500 years, and how to generate the right amount for your layouts.

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4 min read

Markdown Cheat Sheet: A Quick Reference for Developers

All the Markdown syntax you need - headings, lists, links, code blocks, tables, and more. With live preview tips.

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3 min read

How to Compare Text Files and Find Differences

Find what changed between two versions of text, code, or configuration files. Line-by-line comparison with highlights.

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3 min read

What is a UUID and How to Generate One

Understand UUID v4 format, when to use UUIDs vs auto-increment IDs, and how to generate them in your projects.

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4 min read

SHA Hashing Explained: SHA-256, SHA-512, and When to Use Each

Learn what cryptographic hash functions are, how SHA algorithms work, and practical use cases for developers.

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3 min read

Unix Timestamps Explained: The Developer's Time Format

What Unix timestamps are, why they matter, and how to convert between epoch time and human-readable dates.

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3 min read

Unit Conversion Made Easy: A Quick Reference Guide

Common unit conversions for length, weight, temperature, and data size with formulas and tips.

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3 min read

How to Create QR Codes for Free - A Complete Guide

Generate QR codes for URLs, text, WiFi, and more. Learn best practices for size, error correction, and printing.

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5 min read

Regular Expressions for Beginners: A Practical Guide

Learn regex patterns for common tasks like email validation, phone numbers, and text extraction with live examples.

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4 min read

How to Decode JWT Tokens - Understanding JSON Web Tokens

Learn what JWTs are, how they work, and how to decode and inspect their header and payload.

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3 min read

How to Combine Images into a PDF Document

Convert JPG, PNG, or WebP images into a single PDF file. Reorder pages and download instantly.

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3 min read

How to Crop Images Online - Quick and Precise

Crop images to exact dimensions or aspect ratios for social media, websites, and documents.

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3 min read

How to Convert SVG to PNG - A Designer's Guide

Convert scalable vector graphics to raster PNG images at any resolution for use in presentations and documents.

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4 min read

JSON vs YAML: Differences, Pros, and When to Use Each

Compare JSON and YAML formats - syntax differences, readability, use cases, and how to convert between them.

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3 min read

How to Convert HTML to Markdown for Clean Content

Turn HTML markup into clean Markdown text for documentation, README files, and content migration.

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3 min read

How to Convert PDF Pages to Images Online

Extract individual pages from a PDF as high-quality PNG or JPG images for presentations and documents.

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4 min read

CSS Gradients: A Complete Guide to Beautiful Backgrounds

Master linear and radial CSS gradients with examples, color stops, and tips for stunning web design.

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3 min read

CSS Box Shadow: From Subtle to Dramatic Effects

Learn the box-shadow property with visual examples - offsets, blur, spread, color, and inset shadows.

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3 min read

How to Create Professional Invoices for Free

Generate clean, professional invoices with line items, tax calculations, and PDF download - no signup needed.

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3 min read

The Pomodoro Technique: Focus Better with Timed Work Sessions

How the Pomodoro method works, why it's effective, and how to use a timer to boost your productivity.

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