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Tools, Tips & Tutorials

Practical guides for developers, writers, and creators. Every article is free, ad-light, and written to actually be useful.

PDF Tools
PDF Tools10 min read

How to Merge PDFs Into One File (5 Free Methods for 2026)

Need to combine multiple PDFs into one document? Learn 5 free ways to merge PDFs on any device. No software install, no signup, no quality loss.

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PDF Tools
PDF Tools7 min read

How to Compress PDF Files Without Losing Quality (2026 Guide)

PDFs too big for email or upload? Learn 5 free ways to compress PDF files while keeping them readable. Step-by-step guide for Windows, Mac, and online.

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Image Tools
Image Tools6 min read

How to Convert HEIC to JPG (Free, No Download Required) - 2026 Guide

Stuck with iPhone HEIC photos that won't open on Windows or share online? Learn 5 free ways to convert HEIC to JPG in seconds. No software install needed.

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Updates
Updates1 min read

Welcome to the ConvertDox Blog

Tutorials, tips, and deep-dives on PDFs, images, AI tools, calculators, and developer utilities. New guides every week.

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Developer Tools
Developer Tools2 min read

How to Convert Images to Base64: Complete Guide for Developers

When Base64-encoded images speed up your site and when they slow it down — plus copy-paste examples for HTML, CSS, JS, and Python.

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Security
Security2 min read

10 Best Free Password Generators in 2026 (Security Expert Picks)

Browser-based, client-side, open source — we rank the most trustworthy free password generators and explain what really matters.

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Calculators
Calculators2 min read

How to Calculate BMI Accurately: Formula, Categories & Limitations

The metric and imperial BMI formulas, a worked example, the category table doctors actually use, and where BMI falls short.

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Developer Tools
Developer Tools2 min read

What Is a JSON Formatter and Why Every Developer Needs One

A practical guide to reading messy API payloads, fixing validation errors, and turning minified JSON into something readable.

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Text Tools
Text Tools2 min read

How to Count Words Online: 5 Methods Compared (2026 Guide)

From dedicated tools to command-line tricks, here are the five fastest ways to count words online — with a side-by-side comparison.

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