Guides & Tutorials
Practical tips and step-by-step guides on using online tools for PDFs, images, text, and development.
How to Merge PDF Files Online — Free, No Install
Learn how to combine multiple PDF files into a single document quickly and safely using browser-based tools, without installing software.
ImageHow to Compress Images to a Specific File Size
Reduce image file size to meet upload limits while keeping quality. Step-by-step guide for compressing images to exact sizes like 500KB or 1MB.
DeveloperWhat is Base64 Encoding? A Practical Guide
Understand Base64 encoding — what it is, why it's used, and how to encode/decode values for APIs, emails, and data URIs.
DeveloperJSON Formatting & Validation — Quick Guide for Developers
How to format, validate, and debug JSON data. Covers common errors, best practices, and tools for working with JSON responses and config files.
MiscellaneousHow to Generate QR Codes — Free Online Generator
Create QR codes for URLs, text, WiFi, and contacts. Learn QR code best practices for print and digital use.
PDFDocument Checklist for Job Applications (PDF + Image)
A practical checklist for preparing resumes, cover letters, and certificates so they pass portal upload rules and look professional.
DeveloperJSON API Debugging Checklist: Fast Root Cause Isolation
Use this API debugging checklist to quickly isolate malformed JSON, encoding issues, and schema mismatches before they hit production.